The paper presents results of an investigation conducted to study the impact resistance of polyvinyl alcohol fiber reinforced cementitious composite(PVA-FRCC)beams containing silica fume and fly ash.PVA-FRCC beam spec...The paper presents results of an investigation conducted to study the impact resistance of polyvinyl alcohol fiber reinforced cementitious composite(PVA-FRCC)beams containing silica fume and fly ash.PVA-FRCC beam specimens of size 100×100×400 mm were tested under impact loading.The specimen incorporated four different volume fractions i.e.0,0.5%,1.0%and 2.0%of corrugated PVA fibers.Silica fume and fly ash were added for the specimens containing PVA fibers volume fraction of 2.0%.The drop-weight type impact tests were conducted on the test specimens and the number of blows of the hammer required to induce first visible crack and ultimate failure of the specimen were recorded.The results are presented in terms of number of blows required,impact ductility as well as impact energy at first crack and ultimate failure.It has been observed that specimen containing 2.0%PVA fibers gave the best performance under impact loading,and that impact resistance was improved after silica fume and fly ash were added.展开更多
In order to investigate the calculation methods on crack resistance capacity of connection composed of cross shaped steel encased ultra high strength concrete(CSSEUHSC)columns and steel encased concrete(SEC)beams unde...In order to investigate the calculation methods on crack resistance capacity of connection composed of cross shaped steel encased ultra high strength concrete(CSSEUHSC)columns and steel encased concrete(SEC)beams under cycle loads,six interior connection specimens were tested in the laboratory.A discussion on the crack resistance capacity was presented.Calculation methods of crack resistance capacity were deduced based on the experimental case and calculation results were in good agreement with the experimental results.The research results indicated that parameters of connection composed of CSSEUHSC columns and SEC beams with better crack resistance performance may be referred for engineering application.展开更多
基金supported by the National Natural Science Foundation of China(Nos.50968011 and 51168033)the Natural Science Foundation of Inner Mongolia(No.2009MS0716)+1 种基金the Springfield Plan in Ministry of Education(No.Z2004-2-15026)the Scientific Research Plan in Inner Mongolia University of Technology(No.ZS201137)
文摘The paper presents results of an investigation conducted to study the impact resistance of polyvinyl alcohol fiber reinforced cementitious composite(PVA-FRCC)beams containing silica fume and fly ash.PVA-FRCC beam specimens of size 100×100×400 mm were tested under impact loading.The specimen incorporated four different volume fractions i.e.0,0.5%,1.0%and 2.0%of corrugated PVA fibers.Silica fume and fly ash were added for the specimens containing PVA fibers volume fraction of 2.0%.The drop-weight type impact tests were conducted on the test specimens and the number of blows of the hammer required to induce first visible crack and ultimate failure of the specimen were recorded.The results are presented in terms of number of blows required,impact ductility as well as impact energy at first crack and ultimate failure.It has been observed that specimen containing 2.0%PVA fibers gave the best performance under impact loading,and that impact resistance was improved after silica fume and fly ash were added.
基金supported by National Natural Science Foundation of China(Nos.51168034,50878037)China Postdoctoral Science Foundation(No.20100471445)Open Foundation of State Key Laboratory of Coastal and Offshore Engineering(No.LP1015)
文摘In order to investigate the calculation methods on crack resistance capacity of connection composed of cross shaped steel encased ultra high strength concrete(CSSEUHSC)columns and steel encased concrete(SEC)beams under cycle loads,six interior connection specimens were tested in the laboratory.A discussion on the crack resistance capacity was presented.Calculation methods of crack resistance capacity were deduced based on the experimental case and calculation results were in good agreement with the experimental results.The research results indicated that parameters of connection composed of CSSEUHSC columns and SEC beams with better crack resistance performance may be referred for engineering application.
