Spectrum characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground ...Spectrum characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground response wave （named LS-R wave） of a soft soil site with deep deposit, taking long-period bedrock seismic record as input, was calculated by wave propagation method. After that, a TOMAKOMAI station long-period seismic record from the Tokachi-Oki earthquake and conventional E1-Centro wave were also chosen. Spectrum characteristics of these waves were analyzed and compared. Then, a series of shaking table tests were performed on a 1：50 scale super high-rise structural model under these seismic waves. Furthermore, numerical simulation of the prototype structure under these excitations was conducted, and structure damages under different intensive ground motions were discussed. The results show that： 1） Spectrum characteristics of ground response wave are significantly influenced by soft soil site with deep deposit, and the predominant period has an increasing trend. 2） The maximum acceleration amplification factor of the structure under the TOM wave is two times that under the E1-Centro wave; while the maximum displacement response of the structure under the TOM wave is 4.4 times that under the E1-Centro wave. Long-period ground motions show greater influences on displacement responses than acceleration responses for super high-rise building structures. 3） Most inelastic damage occurs at the upper 1/3 part of the super high-rise building when subjected to long-period ground motions.展开更多
For super high-rise buildings, the vibration period of the basic mode is several seconds, and it is very close to the period of the fluctuating wind. The damping of super high-rise buildings is low, so super high-rise...For super high-rise buildings, the vibration period of the basic mode is several seconds, and it is very close to the period of the fluctuating wind. The damping of super high-rise buildings is low, so super high-rise buildings are very sensitive to fluctuating wind. The wind load is one of the key loads in the design of super high-rise buildings. It is known that only the basic mode is needed in the wind-response analysis of tall buildings. However, for super high-rise buildings, especially for the acceleration response, because of the frequency amplification of the high modes, the high modes and the mode coupling may need to be considered. Three typical super high-rise projects with the SMPSS in wind tunnel tests and the random vibration theory method were used to analyze the effect of high modes on the wind-induced response. The conclusions can be drawn as follows. First, for the displacement response, the basic mode is dominant, and the high modes can be neglected. Second, for the acceleration response, the high modes and the mode coupling should be considered. Lastly, the strain energy of modes can only give the vibration energy distribution of the high-rise building, and it cannot describe the local wind-induced vibration of high-rise buildings, especially for the top acceleration response.展开更多
In recent years with the increasing number of super high-rise buildings and the ever-expanding scale the anti-smoke construction technology has attracted more and more attention.Based on this situation,this paper anal...In recent years with the increasing number of super high-rise buildings and the ever-expanding scale the anti-smoke construction technology has attracted more and more attention.Based on this situation,this paper analyzes the smoke control technology of super high-rise buildings.The paper analyzes the importance of the application of anti-smoke construction technology in super high-rise buildings,analyzes the problems in the construction of smoke control and super high-rise buildings.The anti-smoke construction technology was studied and I hope that it can benefit the application of anti-smoke construction technology in high-rise buildings.展开更多
Integrated wiring system is an important infrastructure in ultra-high-rise buildings. Only by ensuring the rationality of the design of integrated wiring system can the use function of ultra-high-rise buildings be ens...Integrated wiring system is an important infrastructure in ultra-high-rise buildings. Only by ensuring the rationality of the design of integrated wiring system can the use function of ultra-high-rise buildings be ensured. In this paper, the concept of ultra-high-rise building and integrated wiring system is briefly introduced at first, then the importance of integrated wiring system to ultra-high-rise building is clarified, then the design points of integrated wiring system of ultra-high-rise building are analyzed combined with actual projects, and finally the management optimization scheme of integrated wiring system of ultra-high-rise building is discussed.展开更多
Deep foundation pit engineering actually refers to the earthwork excavation, support or precipitation engineering of the foundation pit with an excavation depth greater than 5m, where BIM technology can achieve twice ...Deep foundation pit engineering actually refers to the earthwork excavation, support or precipitation engineering of the foundation pit with an excavation depth greater than 5m, where BIM technology can achieve twice the result with half the effort. In addition, the depth of the foundation pit is insufficient, but the surrounding geological environment and the more complex earthwork excavation of underground pipelines can also be used. In recent years, in the process of urban development in China, the utilization rate of underground space has been significantly improved. In the common subway, underground shopping malls and tunnels and other large-scale engineering excavation, using BIM technology is also a very reasonable choice. Based on this, this article studies the application of BIM technology in the construction of deep foundation pit of super high-rise buildings for reference.展开更多
This paper introduces the installation technology of horizontal embedded glass curtain wall in super high-rise building from aspects of construction technology and key technology, etc. The technology has the advantage...This paper introduces the installation technology of horizontal embedded glass curtain wall in super high-rise building from aspects of construction technology and key technology, etc. The technology has the advantages of simple installation, high construction precision, high speed, low labor intensity, material saving, low construction cost, good construction quality, saving construction period, good fire-proof and impermeability, etc. It can effectively overcome the difficulties encountered in the construction of traditional glass curtain walls, meet the construction requirements of super-high-rise buildings, and has a wider application range. The application of this technology in the construction of super-high-rise buildings has remarkable technical and economic benefits, and it is worth spreading.展开更多
The main concern of this paper is to provide an extensive study for the structural behavior of low/medium/high rise office buildings aiming to deepen structure and architect designers understanding for such type of bu...The main concern of this paper is to provide an extensive study for the structural behavior of low/medium/high rise office buildings aiming to deepen structure and architect designers understanding for such type of buildings. The study is performed on reinforced concrete and emphasized only on Kuwait city conditions for wind. Regular layout plan building with different heights ranging from five to fifty typical office stories are investigated in this study. Three dimensional finite element techniques through ETABS software are used in conducting analysis for structures presented here-in. A serviceability study is performed to ensure that buildings have sufficient stability to limit lateral drift and peak acceleration within the acceptable range of occupancy comfort. In addition, an ultimate strength study is carried out to design and verify that all the structural elements are designed to withstand factored gravity and lateral loadings in a safe manner according to the international building codes. The building slenderness ratio and the building core size and location are the studied parameters since they are the key drivers for the efficient structural design. Analysis results are presented and discussed and finally conclusions are summarized as guidelines for designers of concrete office buildings in Kuwait.展开更多
Buildings with more than 40 storeies or more than the height of 100 are super high-rise buildings. The construction scale of super high-rise buildings is larger, and the construction difficulty is higher, and the fire...Buildings with more than 40 storeies or more than the height of 100 are super high-rise buildings. The construction scale of super high-rise buildings is larger, and the construction difficulty is higher, and the fire danger is more serious. Therefore, it is necessary for us to strengthen the research on the fire safety of super high-rise building construction, effectively do a good job in the fire safety of super high-rise building construction, ensure the smooth development of the project and avoid the loss caused by fire.展开更多
The raft construction of mass concrete foundation is a very important part in the process of engineering construction. Once the volume of concrete increases, the temperature difference between the inside and outside o...The raft construction of mass concrete foundation is a very important part in the process of engineering construction. Once the volume of concrete increases, the temperature difference between the inside and outside of the concrete will occur, which will cause cracks in the concrete, which will have a significant impact on the engineering. Therefore, this paper is based on the temperature principle of the engineering mass concrete foundation raft.展开更多
Super high-rise buildings are typically located in bustling urban areas.Due to their considerable height and limited construction space,numerous challenges arise during the construction process.To enhance the safety a...Super high-rise buildings are typically located in bustling urban areas.Due to their considerable height and limited construction space,numerous challenges arise during the construction process.To enhance the safety and efficiency of super highrise building construction,this paper designs an intelligent construction machine steel truss platform suitable for the core tube structure of such buildings.Numerical analyses of the designed steel truss platform were conducted during the construction,jacking,and self-climbing phases.The analysis results indicate that the strength and stiffness of the intelligent construction machine steel truss platform meet the design standards for steel structures,ensuring the overall safety and reliability of the structure.However,stress and deformation are relatively high at the connections between primary and secondary trusses,particularly in the chords and webs,as well as at the joints between truss beams and columns.To facilitate construction and improve structural safety reserves,technical and structural optimization suggestions are proposed based on the analysis results.This study provides valuable insights for the design of similar intelligent construction machine steel truss platforms in engineering projects.展开更多
In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civil engineering. The collapse resistance of super high-rise buildings subjected to extremely str...In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civil engineering. The collapse resistance of super high-rise buildings subjected to extremely strong earthquake is a critical problem that must be intensively studied. This paper builds up a nonlinear finite element model of the tallest building in China, Shang- hai Tower (632 m), and proposes the modeling method and failure criteria for different structural elements. The dynamic char- acters of this building are then analyzed, and the possible failure modes and collapse processes due to earthquakes are pre- dicted, as well as the corresponding collapse mechanism. This work will be helpful in collapse prevention and the seismic design of super high-rise buildings.展开更多
Ground motion intensity measure (IM) is an important part in performance-based seismic design. A reasonable and efficient IM can make the prediction of the structural seismic responses more accurate. Therefore, a more...Ground motion intensity measure (IM) is an important part in performance-based seismic design. A reasonable and efficient IM can make the prediction of the structural seismic responses more accurate. Therefore, a more reasonable IM for super high-rise buildings is proposed in this paper. This IM takes into account the significant characteristic that higher-order vibration modes play important roles in the seismic response of super high-rise buildings, as well as the advantages of some existing IMs. The key parameter of the proposed IM is calibrated using a series of time-history analyses. The collapse simulations of two super high-rise buildings are used to discuss the suitability of the proposed IM and some other existing IMs. The results indicate that the proposed IM yields a smaller coefficient of variation for the critical collapse status than other existing IMs and performs well in reflecting the contribution of higher-order vibration modes to the structural response. Hence, the proposed IM is more applicable to seismic design for super high-rise buildings than other IMs.展开更多
基金Project(50978198) supported by the National Natural Science Foundation of ChinaProject(SLDRCE08-B-03) supported by the Ministry of Science and Technology of China
文摘Spectrum characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground response wave （named LS-R wave） of a soft soil site with deep deposit, taking long-period bedrock seismic record as input, was calculated by wave propagation method. After that, a TOMAKOMAI station long-period seismic record from the Tokachi-Oki earthquake and conventional E1-Centro wave were also chosen. Spectrum characteristics of these waves were analyzed and compared. Then, a series of shaking table tests were performed on a 1：50 scale super high-rise structural model under these seismic waves. Furthermore, numerical simulation of the prototype structure under these excitations was conducted, and structure damages under different intensive ground motions were discussed. The results show that： 1） Spectrum characteristics of ground response wave are significantly influenced by soft soil site with deep deposit, and the predominant period has an increasing trend. 2） The maximum acceleration amplification factor of the structure under the TOM wave is two times that under the E1-Centro wave; while the maximum displacement response of the structure under the TOM wave is 4.4 times that under the E1-Centro wave. Long-period ground motions show greater influences on displacement responses than acceleration responses for super high-rise building structures. 3） Most inelastic damage occurs at the upper 1/3 part of the super high-rise building when subjected to long-period ground motions.
基金National Natural Science Foundation of China Under Grant No.50908044 Jiangsu Provincial Natural Science Foundation of China Under Grant No.SBK201123270 a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and StateKey Lab of Subtropical Building Science,South China University of Technology Under Grant No.2011KA05
文摘For super high-rise buildings, the vibration period of the basic mode is several seconds, and it is very close to the period of the fluctuating wind. The damping of super high-rise buildings is low, so super high-rise buildings are very sensitive to fluctuating wind. The wind load is one of the key loads in the design of super high-rise buildings. It is known that only the basic mode is needed in the wind-response analysis of tall buildings. However, for super high-rise buildings, especially for the acceleration response, because of the frequency amplification of the high modes, the high modes and the mode coupling may need to be considered. Three typical super high-rise projects with the SMPSS in wind tunnel tests and the random vibration theory method were used to analyze the effect of high modes on the wind-induced response. The conclusions can be drawn as follows. First, for the displacement response, the basic mode is dominant, and the high modes can be neglected. Second, for the acceleration response, the high modes and the mode coupling should be considered. Lastly, the strain energy of modes can only give the vibration energy distribution of the high-rise building, and it cannot describe the local wind-induced vibration of high-rise buildings, especially for the top acceleration response.
文摘In recent years with the increasing number of super high-rise buildings and the ever-expanding scale the anti-smoke construction technology has attracted more and more attention.Based on this situation,this paper analyzes the smoke control technology of super high-rise buildings.The paper analyzes the importance of the application of anti-smoke construction technology in super high-rise buildings,analyzes the problems in the construction of smoke control and super high-rise buildings.The anti-smoke construction technology was studied and I hope that it can benefit the application of anti-smoke construction technology in high-rise buildings.
文摘Integrated wiring system is an important infrastructure in ultra-high-rise buildings. Only by ensuring the rationality of the design of integrated wiring system can the use function of ultra-high-rise buildings be ensured. In this paper, the concept of ultra-high-rise building and integrated wiring system is briefly introduced at first, then the importance of integrated wiring system to ultra-high-rise building is clarified, then the design points of integrated wiring system of ultra-high-rise building are analyzed combined with actual projects, and finally the management optimization scheme of integrated wiring system of ultra-high-rise building is discussed.
文摘Deep foundation pit engineering actually refers to the earthwork excavation, support or precipitation engineering of the foundation pit with an excavation depth greater than 5m, where BIM technology can achieve twice the result with half the effort. In addition, the depth of the foundation pit is insufficient, but the surrounding geological environment and the more complex earthwork excavation of underground pipelines can also be used. In recent years, in the process of urban development in China, the utilization rate of underground space has been significantly improved. In the common subway, underground shopping malls and tunnels and other large-scale engineering excavation, using BIM technology is also a very reasonable choice. Based on this, this article studies the application of BIM technology in the construction of deep foundation pit of super high-rise buildings for reference.
文摘This paper introduces the installation technology of horizontal embedded glass curtain wall in super high-rise building from aspects of construction technology and key technology, etc. The technology has the advantages of simple installation, high construction precision, high speed, low labor intensity, material saving, low construction cost, good construction quality, saving construction period, good fire-proof and impermeability, etc. It can effectively overcome the difficulties encountered in the construction of traditional glass curtain walls, meet the construction requirements of super-high-rise buildings, and has a wider application range. The application of this technology in the construction of super-high-rise buildings has remarkable technical and economic benefits, and it is worth spreading.
文摘The main concern of this paper is to provide an extensive study for the structural behavior of low/medium/high rise office buildings aiming to deepen structure and architect designers understanding for such type of buildings. The study is performed on reinforced concrete and emphasized only on Kuwait city conditions for wind. Regular layout plan building with different heights ranging from five to fifty typical office stories are investigated in this study. Three dimensional finite element techniques through ETABS software are used in conducting analysis for structures presented here-in. A serviceability study is performed to ensure that buildings have sufficient stability to limit lateral drift and peak acceleration within the acceptable range of occupancy comfort. In addition, an ultimate strength study is carried out to design and verify that all the structural elements are designed to withstand factored gravity and lateral loadings in a safe manner according to the international building codes. The building slenderness ratio and the building core size and location are the studied parameters since they are the key drivers for the efficient structural design. Analysis results are presented and discussed and finally conclusions are summarized as guidelines for designers of concrete office buildings in Kuwait.
文摘Buildings with more than 40 storeies or more than the height of 100 are super high-rise buildings. The construction scale of super high-rise buildings is larger, and the construction difficulty is higher, and the fire danger is more serious. Therefore, it is necessary for us to strengthen the research on the fire safety of super high-rise building construction, effectively do a good job in the fire safety of super high-rise building construction, ensure the smooth development of the project and avoid the loss caused by fire.
文摘The raft construction of mass concrete foundation is a very important part in the process of engineering construction. Once the volume of concrete increases, the temperature difference between the inside and outside of the concrete will occur, which will cause cracks in the concrete, which will have a significant impact on the engineering. Therefore, this paper is based on the temperature principle of the engineering mass concrete foundation raft.
基金Shaanxi Provincial Key Research and Development Program(2023JBGS-17)。
文摘Super high-rise buildings are typically located in bustling urban areas.Due to their considerable height and limited construction space,numerous challenges arise during the construction process.To enhance the safety and efficiency of super highrise building construction,this paper designs an intelligent construction machine steel truss platform suitable for the core tube structure of such buildings.Numerical analyses of the designed steel truss platform were conducted during the construction,jacking,and self-climbing phases.The analysis results indicate that the strength and stiffness of the intelligent construction machine steel truss platform meet the design standards for steel structures,ensuring the overall safety and reliability of the structure.However,stress and deformation are relatively high at the connections between primary and secondary trusses,particularly in the chords and webs,as well as at the joints between truss beams and columns.To facilitate construction and improve structural safety reserves,technical and structural optimization suggestions are proposed based on the analysis results.This study provides valuable insights for the design of similar intelligent construction machine steel truss platforms in engineering projects.
基金supported by the National Natural Science Foundation of China (Grant No. 90815025)the Tsinghua University Research Funds (Grant No. 2010THZ02-1)the "Program for New Century Excellent Talents in University"
文摘In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civil engineering. The collapse resistance of super high-rise buildings subjected to extremely strong earthquake is a critical problem that must be intensively studied. This paper builds up a nonlinear finite element model of the tallest building in China, Shang- hai Tower (632 m), and proposes the modeling method and failure criteria for different structural elements. The dynamic char- acters of this building are then analyzed, and the possible failure modes and collapse processes due to earthquakes are pre- dicted, as well as the corresponding collapse mechanism. This work will be helpful in collapse prevention and the seismic design of super high-rise buildings.
基金supported by "Twelfth Five-Year" plan major projects supported by National Science and Technology (Grant No.2011BAJ09B01)the National Nature Science Foundation of China (Grant Nos. 51222804, 51261120377)+1 种基金the Tsinghua University Initiative Scientific Research Program (Grant Nos. 2012THZ02-2, 2011THZ03) the Fok Ying Dong Education Foundation (Grant No. 131071)
文摘Ground motion intensity measure (IM) is an important part in performance-based seismic design. A reasonable and efficient IM can make the prediction of the structural seismic responses more accurate. Therefore, a more reasonable IM for super high-rise buildings is proposed in this paper. This IM takes into account the significant characteristic that higher-order vibration modes play important roles in the seismic response of super high-rise buildings, as well as the advantages of some existing IMs. The key parameter of the proposed IM is calibrated using a series of time-history analyses. The collapse simulations of two super high-rise buildings are used to discuss the suitability of the proposed IM and some other existing IMs. The results indicate that the proposed IM yields a smaller coefficient of variation for the critical collapse status than other existing IMs and performs well in reflecting the contribution of higher-order vibration modes to the structural response. Hence, the proposed IM is more applicable to seismic design for super high-rise buildings than other IMs.
