In the 1990s, several major earthquakes occurred throughout the world, with a common observation that near fault ground motion （NFGM） characteristics had a distinct impact on causing damage to civil engineering stru...In the 1990s, several major earthquakes occurred throughout the world, with a common observation that near fault ground motion （NFGM） characteristics had a distinct impact on causing damage to civil engineering structures that could not be predicted by using far field ground motions. Since then, seismic responses of structures under NFGMs have been extensively examined, with most of the studies focusing on structures with relatively short fundamental periods, where the traveling wave effect does not need to be considered. However, for long span bridges, especially arch bridges, the traveling wave （only time delay considered） effect may be very distinct and is therefore important. In this paper, the results from a case study on the seismic response of a steel arch bridge under selected NFGMs is presented by considering the traveling wave effect with variable apparent velocities. The effects of fling step and long period pulses of NFGMs on the seismic responses of the arch bridge are also discussed.展开更多
To investigate the seismic performance of hollow reinforced concrete （RC） bridge columns of rectangular cross section under constant axial load and cyclically biaxial bending, five specimens were tested. A parametri...To investigate the seismic performance of hollow reinforced concrete （RC） bridge columns of rectangular cross section under constant axial load and cyclically biaxial bending, five specimens were tested. A parametric study is carried out for different axial load ratios, longitudinal reinforcement ratios and lateral reinforcement ratios. The experimental results showed that all tested specimens failed in the flexural failure mode and their ultimate performance was dominated by flexural capacity, which is represented by the rupture/buckling of tensile longitudinal rebars at the bottom of the bridge columns. Biaxial force and displacement hysteresis loops showed significant stiffness and strength degradations, and the pinching effect and coupling interaction effect of both directions severely decrease the structural seismic resistance. However, the measured ductility coefficient varying from 3.5 to 5.7 and the equivalent viscous damping ratio varying from 0.19 and 0.26 can meet the requirements of the seismic design. The hollow RC rectangular bridge columns with configurations of lateral reinforcement in this study have excellent performance under bidirectional earthquake excitations, and may be considered as a substitute for current hollow RC rectangular section configurations described in the Guideline for Seismic Design of Highway Bridges （JTG/T B02-01-2008）. The length of the plastic hinge region was found to approach one sixth of the hollow RC rectangular bridge column height for all specimen columns, and it was much less than those specified in the current JTG/T. Thus, the length of the plastic hinge region is more concentrated for RC rectangular hollow bridge columns.展开更多
Major earthquakes of last 15 years （e.g., Northridge 1994, Kobe 1995 and Chi-Chi 1999） have shown that many near-fault ground motions possess prominent acceleration pulses. Some of the prominent ground acceleration ...Major earthquakes of last 15 years （e.g., Northridge 1994, Kobe 1995 and Chi-Chi 1999） have shown that many near-fault ground motions possess prominent acceleration pulses. Some of the prominent ground acceleration pulses are related to large ground velocity pulses, others are caused by mechanisms that are totally different from those causing the velocity pulses or fling steps. Various efforts to model acceleration pulses have been reported in the literature. In this paper, research results from a recent study of acceleration pulse prominent ground motions and an analysis of structural damage induced by acceleration pulses are summarized. The main results of the study include： （1） temporal characteristics of acceleration pulses; （2） ductility demand spectrum of simple acceleration pulses with respect to equivalent classes of dynamic systems and pulse characteristic parameters; and （3） estimation of fundamental period change under the excitation of strong acceleration pulses. By using the acceleration pulse induced linear acceleration spectrum and the ductility demand spectrum, a simple procedure has been developed to estimate the ductility demand and the fundamental period change of a reinforced concrete （RC） structure under the impact of a strong acceleration pulse.展开更多
Use of stainless reinforcing steel （SRS） in reinforced concrete （RC） structures is a promising solution to corrosion issues. However, for SRS to be used in seismic applications, several mechanical properties need ...Use of stainless reinforcing steel （SRS） in reinforced concrete （RC） structures is a promising solution to corrosion issues. However, for SRS to be used in seismic applications, several mechanical properties need to be investigated. These include specified and actual yield strengths, tensile strengths, uniform elongations and low-cycle fatigue behavior. Three types of SRSs （Talley S24100, Talley 316LN and Talley 2205） were tested and the results are reported in this paper. They were compared with the properties of A706 carbon reinforcing steel （RS）, which is typical for seismic applications, and MMFX II, which is a high strength, corrosion resistant RS. Low-cycle fatigue tests of the RS coupons were conducted under strain control with constant amplitude to obtain strain life models of the steels. Test results show that the SRSs have slightly lower moduli of elasticity, higher uniform elongations before necking, and better low-cycle fatigue performance than A706 and MMFX II. All five types of RSs tested satisfy the requirements of the ACI 318 code on the lower limit of the tensile to yield strength ratio. Except Talley 2205, the other four types of RSs investigated meet the ACI 318 requirement that the actual yield strength does not exceed the specified yield strength by more than 18 ksi （124 MPa）. Among the three types of SRSs tested, Talley S24100 possesses the highest uniform elongation before necking, and the best low-cycle fatigue performance.展开更多
As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believethe first six issues are on the right track toward promoting scientific exchange between China, the U...As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believethe first six issues are on the right track toward promoting scientific exchange between China, the United States and theinternational community. Our contributors have hailed from many countries throughout the world including Canada,China, Greece, Italy, India, Japan, Korea, New Zealand, Turkey and the United States.展开更多
Dear Members of the Editorial Board,Contributors and Friends of the journal,This issue of Earthquake Engineering and Engineering Vibration(Vol.22,No.1)includes five papers in a special section entitled“Computer Visio...Dear Members of the Editorial Board,Contributors and Friends of the journal,This issue of Earthquake Engineering and Engineering Vibration(Vol.22,No.1)includes five papers in a special section entitled“Computer Vision Empowering Earthquake Engineering and Engineering Vibration”.The special section aims to promote recent advances and generate discussions in computer vision as applied to earthquake engineering and engineering vibration.We thank vip editors,Prof.Jian Li of The University of Kansas,USA,Prof.Vedhus Hoskere of University of Houston,USA and Prof.Yasutaka Narazaki,Zhejiang University/University of Illinois at Urbana-Champaign Institute,Zhejiang University,China,for their hard work and dedication.We also want to thank the managing executive editor,Prof.Billie F.Spencer of University of Illinois at Urbana-Champaign,for his invaluable guidance.展开更多
Dear Members of the Editorial Board,Contributors and Friends of the journal,This issue of Earthquake Engineering and Engineering Vibration(Vol.22,No.2)includes seven papers in a special section entitled“Computer Visi...Dear Members of the Editorial Board,Contributors and Friends of the journal,This issue of Earthquake Engineering and Engineering Vibration(Vol.22,No.2)includes seven papers in a special section entitled“Computer Vision Empowering Earthquake Engineering and Engineering Vibration”.The special section aims to promote recent advances and generate discussions in computer vision as applied to earthquake engineering and engineering vibration.We thank vip editors,Prof.Jian Li of The University of Kansas,USA,Prof.Vedhus Hoskere of University of Houston,USA and Prof.Yasutaka Narazaki,Zhejiang University/University of Illinois at UrbanaChampaign Institute,Zhejiang University,China,for their hard work and dedication.展开更多
During the past several months, we have been considering "Special Issues" on a variety of topics for the journal of Earthquake Engineering and Engineering Vibration. We are pleased to announce that the Decem...During the past several months, we have been considering "Special Issues" on a variety of topics for the journal of Earthquake Engineering and Engineering Vibration. We are pleased to announce that the December 2008 issue will be展开更多
In this paper, analytical results from 3D temporal characteristics of the responses of an RC frame building subjected to both a large aflershock and the main shock of Wenchuan M8.0 earthquake are presented. The ground...In this paper, analytical results from 3D temporal characteristics of the responses of an RC frame building subjected to both a large aflershock and the main shock of Wenchuan M8.0 earthquake are presented. The ground motion records from the main shock were obtained from three nearby stations. The acceleration records were analyzed in terms of instantaneous tangential acceleration αv normal acceleration αN, Euclidean norm of acceleration vector lal, velocity vector ｜v｜, displacement vector ｜d｜, temporal curvature κ,κt, and temporal torsion γ and γt.Results of the kinematic relationship between the above factors and some additional in depth information obtained from extensive analyses are provided and discussed.展开更多
The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly
As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believe the first six issues are on the right track toward promoting scientific exchange between China, the ...As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believe the first six issues are on the right track toward promoting scientific exchange between China, the United States and the international community. Our contributors have hailed from many countries throughout the world including Canada, China, Greece, Italy, India, Japan, Korea, New Zealand, Turkey and the United States.展开更多
As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believe the first six issues are on the right track toward promoting scientific exchange between China, the ...As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believe the first six issues are on the right track toward promoting scientific exchange between China, the United States and the international community. Our contributors have hailed from many countries throughout the world including Canada, China, Greece, Italy, India, Japan, Korea, New Zealand, Turkey and the United States.展开更多
This issue is devoted to the subject of earthquake response control of structures in recognition of the significant contribution to this field by Professor Tsu-Teh Soong. Professor Soong recently retired from the Univ...This issue is devoted to the subject of earthquake response control of structures in recognition of the significant contribution to this field by Professor Tsu-Teh Soong. Professor Soong recently retired from the University at Buffalo, State University of New York, where he has taught and conducted research for over 40 years.展开更多
Last year was a transformational one for us as Earthquake Engineering and Engineering Vibration changed from a semi-annual to a quarterly schedule and began publication as part of the Springer Verlag organization. We ...Last year was a transformational one for us as Earthquake Engineering and Engineering Vibration changed from a semi-annual to a quarterly schedule and began publication as part of the Springer Verlag organization. We believe展开更多
The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly schedule and is published by
The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly schedule and is published by Springer Verlag. Beginning with ...The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly schedule and is published by Springer Verlag. Beginning with Vol. 6, No. 1, four issues of about 100 pages each will be published each year. The journal will continue to be available in print format, and a new electronic offering will be accessible through SpringerLink, Springer’s Internet portal. We believe展开更多
Dear Members of Editorial Board.Contributors and Friends of the journal of EEHV,This special issue on the"State-of-the-art and Future Challenges of Earthquake Engineering"is dedicated to today’s young earth...Dear Members of Editorial Board.Contributors and Friends of the journal of EEHV,This special issue on the"State-of-the-art and Future Challenges of Earthquake Engineering"is dedicated to today’s young earthquake engineering researchers by describing certain insight of research opportunities in earthquake engineering.We express our sincere appreciation to the following individuals:Professor Gian Michele CALVI,Professor Kuo-Chun展开更多
We wish to sincerely thank Professor Li Jianzhong of Tongji University and Professor Ian Buckle of the University of Nevada at Reno, for acting as vip editors of our first special issue on the ＂Seismic Design and R...We wish to sincerely thank Professor Li Jianzhong of Tongji University and Professor Ian Buckle of the University of Nevada at Reno, for acting as vip editors of our first special issue on the ＂Seismic Design and Retrofit of Highway Bridges.＂ These two well-known experts in the field have helped to provide ten papers on a variety of topics important in bridge engineering today.展开更多
基金Federal Highway Administration(FHWA) Under Grant No.DTFH41-98900094
文摘In the 1990s, several major earthquakes occurred throughout the world, with a common observation that near fault ground motion （NFGM） characteristics had a distinct impact on causing damage to civil engineering structures that could not be predicted by using far field ground motions. Since then, seismic responses of structures under NFGMs have been extensively examined, with most of the studies focusing on structures with relatively short fundamental periods, where the traveling wave effect does not need to be considered. However, for long span bridges, especially arch bridges, the traveling wave （only time delay considered） effect may be very distinct and is therefore important. In this paper, the results from a case study on the seismic response of a steel arch bridge under selected NFGMs is presented by considering the traveling wave effect with variable apparent velocities. The effects of fling step and long period pulses of NFGMs on the seismic responses of the arch bridge are also discussed.
基金National Natural Science Foundation of China under Grant No.51178008,No.50908005National Basic Research Program of China under Grant No.2011CB013600+1 种基金the International Cooperative Project of NSFC-JST under Grant No.51021140003a Joint Research Project between the Beijing University of Technology and the University at Buffalo with Partial Support from the U.S.Federal Highway Administration under Contract No.DTFH61-07-C-00020
文摘To investigate the seismic performance of hollow reinforced concrete （RC） bridge columns of rectangular cross section under constant axial load and cyclically biaxial bending, five specimens were tested. A parametric study is carried out for different axial load ratios, longitudinal reinforcement ratios and lateral reinforcement ratios. The experimental results showed that all tested specimens failed in the flexural failure mode and their ultimate performance was dominated by flexural capacity, which is represented by the rupture/buckling of tensile longitudinal rebars at the bottom of the bridge columns. Biaxial force and displacement hysteresis loops showed significant stiffness and strength degradations, and the pinching effect and coupling interaction effect of both directions severely decrease the structural seismic resistance. However, the measured ductility coefficient varying from 3.5 to 5.7 and the equivalent viscous damping ratio varying from 0.19 and 0.26 can meet the requirements of the seismic design. The hollow RC rectangular bridge columns with configurations of lateral reinforcement in this study have excellent performance under bidirectional earthquake excitations, and may be considered as a substitute for current hollow RC rectangular section configurations described in the Guideline for Seismic Design of Highway Bridges （JTG/T B02-01-2008）. The length of the plastic hinge region was found to approach one sixth of the hollow RC rectangular bridge column height for all specimen columns, and it was much less than those specified in the current JTG/T. Thus, the length of the plastic hinge region is more concentrated for RC rectangular hollow bridge columns.
基金U.S. National Science Foundation Under Grant CMS-0202846
文摘Major earthquakes of last 15 years （e.g., Northridge 1994, Kobe 1995 and Chi-Chi 1999） have shown that many near-fault ground motions possess prominent acceleration pulses. Some of the prominent ground acceleration pulses are related to large ground velocity pulses, others are caused by mechanisms that are totally different from those causing the velocity pulses or fling steps. Various efforts to model acceleration pulses have been reported in the literature. In this paper, research results from a recent study of acceleration pulse prominent ground motions and an analysis of structural damage induced by acceleration pulses are summarized. The main results of the study include： （1） temporal characteristics of acceleration pulses; （2） ductility demand spectrum of simple acceleration pulses with respect to equivalent classes of dynamic systems and pulse characteristic parameters; and （3） estimation of fundamental period change under the excitation of strong acceleration pulses. By using the acceleration pulse induced linear acceleration spectrum and the ductility demand spectrum, a simple procedure has been developed to estimate the ductility demand and the fundamental period change of a reinforced concrete （RC） structure under the impact of a strong acceleration pulse.
基金Federal Highway Administration Under Contract No.DTFH61-07-R-00121International Molybdenum Association,Nickel Institute,Talley Metals-A Carpenter Company,North American Stainless and Salit Specialty Steel Through MCEER,University at Buffalo
文摘Use of stainless reinforcing steel （SRS） in reinforced concrete （RC） structures is a promising solution to corrosion issues. However, for SRS to be used in seismic applications, several mechanical properties need to be investigated. These include specified and actual yield strengths, tensile strengths, uniform elongations and low-cycle fatigue behavior. Three types of SRSs （Talley S24100, Talley 316LN and Talley 2205） were tested and the results are reported in this paper. They were compared with the properties of A706 carbon reinforcing steel （RS）, which is typical for seismic applications, and MMFX II, which is a high strength, corrosion resistant RS. Low-cycle fatigue tests of the RS coupons were conducted under strain control with constant amplitude to obtain strain life models of the steels. Test results show that the SRSs have slightly lower moduli of elasticity, higher uniform elongations before necking, and better low-cycle fatigue performance than A706 and MMFX II. All five types of RSs tested satisfy the requirements of the ACI 318 code on the lower limit of the tensile to yield strength ratio. Except Talley 2205, the other four types of RSs investigated meet the ACI 318 requirement that the actual yield strength does not exceed the specified yield strength by more than 18 ksi （124 MPa）. Among the three types of SRSs tested, Talley S24100 possesses the highest uniform elongation before necking, and the best low-cycle fatigue performance.
文摘As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believethe first six issues are on the right track toward promoting scientific exchange between China, the United States and theinternational community. Our contributors have hailed from many countries throughout the world including Canada,China, Greece, Italy, India, Japan, Korea, New Zealand, Turkey and the United States.
文摘Dear Members of the Editorial Board,Contributors and Friends of the journal,This issue of Earthquake Engineering and Engineering Vibration(Vol.22,No.1)includes five papers in a special section entitled“Computer Vision Empowering Earthquake Engineering and Engineering Vibration”.The special section aims to promote recent advances and generate discussions in computer vision as applied to earthquake engineering and engineering vibration.We thank vip editors,Prof.Jian Li of The University of Kansas,USA,Prof.Vedhus Hoskere of University of Houston,USA and Prof.Yasutaka Narazaki,Zhejiang University/University of Illinois at Urbana-Champaign Institute,Zhejiang University,China,for their hard work and dedication.We also want to thank the managing executive editor,Prof.Billie F.Spencer of University of Illinois at Urbana-Champaign,for his invaluable guidance.
文摘Dear Members of the Editorial Board,Contributors and Friends of the journal,This issue of Earthquake Engineering and Engineering Vibration(Vol.22,No.2)includes seven papers in a special section entitled“Computer Vision Empowering Earthquake Engineering and Engineering Vibration”.The special section aims to promote recent advances and generate discussions in computer vision as applied to earthquake engineering and engineering vibration.We thank vip editors,Prof.Jian Li of The University of Kansas,USA,Prof.Vedhus Hoskere of University of Houston,USA and Prof.Yasutaka Narazaki,Zhejiang University/University of Illinois at UrbanaChampaign Institute,Zhejiang University,China,for their hard work and dedication.
文摘During the past several months, we have been considering "Special Issues" on a variety of topics for the journal of Earthquake Engineering and Engineering Vibration. We are pleased to announce that the December 2008 issue will be
基金NSFC program (No. 50678161)the National Major Basic Research 973 Program Under Grant No. 2007CB714205+1 种基金the Science and Technology Support Program Under Grant No. 2006BAC13B02-0301 of the Ministry of Science and Technology of Chinathe Basic Science Research Foundation Program through Institute of Engineering Mechanics, CEA
文摘In this paper, analytical results from 3D temporal characteristics of the responses of an RC frame building subjected to both a large aflershock and the main shock of Wenchuan M8.0 earthquake are presented. The ground motion records from the main shock were obtained from three nearby stations. The acceleration records were analyzed in terms of instantaneous tangential acceleration αv normal acceleration αN, Euclidean norm of acceleration vector lal, velocity vector ｜v｜, displacement vector ｜d｜, temporal curvature κ,κt, and temporal torsion γ and γt.Results of the kinematic relationship between the above factors and some additional in depth information obtained from extensive analyses are provided and discussed.
文摘The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly
文摘As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believe the first six issues are on the right track toward promoting scientific exchange between China, the United States and the international community. Our contributors have hailed from many countries throughout the world including Canada, China, Greece, Italy, India, Japan, Korea, New Zealand, Turkey and the United States.
文摘As the Journal of Earthquake Engineering and Engineering Vibration enters its fourth year of publication, we believe the first six issues are on the right track toward promoting scientific exchange between China, the United States and the international community. Our contributors have hailed from many countries throughout the world including Canada, China, Greece, Italy, India, Japan, Korea, New Zealand, Turkey and the United States.
文摘This issue is devoted to the subject of earthquake response control of structures in recognition of the significant contribution to this field by Professor Tsu-Teh Soong. Professor Soong recently retired from the University at Buffalo, State University of New York, where he has taught and conducted research for over 40 years.
文摘Last year was a transformational one for us as Earthquake Engineering and Engineering Vibration changed from a semi-annual to a quarterly schedule and began publication as part of the Springer Verlag organization. We believe
文摘The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly schedule and is published by
文摘The year 2007 is a transformational one for us as the Journal of Earthquake Engineering and Engineering Vibration changes from a semi-annual to a quarterly schedule and is published by Springer Verlag. Beginning with Vol. 6, No. 1, four issues of about 100 pages each will be published each year. The journal will continue to be available in print format, and a new electronic offering will be accessible through SpringerLink, Springer’s Internet portal. We believe
文摘Dear Members of Editorial Board.Contributors and Friends of the journal of EEHV,This special issue on the"State-of-the-art and Future Challenges of Earthquake Engineering"is dedicated to today’s young earthquake engineering researchers by describing certain insight of research opportunities in earthquake engineering.We express our sincere appreciation to the following individuals:Professor Gian Michele CALVI,Professor Kuo-Chun
文摘We wish to sincerely thank Professor Li Jianzhong of Tongji University and Professor Ian Buckle of the University of Nevada at Reno, for acting as vip editors of our first special issue on the ＂Seismic Design and Retrofit of Highway Bridges.＂ These two well-known experts in the field have helped to provide ten papers on a variety of topics important in bridge engineering today.
