The effects of fire exposure,reinforcement ratio and the presence of axial load under fire on the seismic behavior of reinforced concrete(RC) shear walls were investigated.Five RC shear walls were tested under low cyc...The effects of fire exposure,reinforcement ratio and the presence of axial load under fire on the seismic behavior of reinforced concrete(RC) shear walls were investigated.Five RC shear walls were tested under low cyclic loading.Prior to the cyclic test,three specimens were exposed to fire and two of them were also subjected to a constant axial load.Test results indicate that the ultimate load of the specimen with lower reinforcement ratio is reduced by 15.8%after exposure to elevated temperatures.While the reductions in the energy dissipation and initial stiffness are 59.2%and 51.8%,respectively,which are much higher than those in the ultimate load.However,this deterioration can be slowed down by properly increasing reinforcement due to the strength and stiffness recovery of steel bars after cooling.In addition,the combined action of elevated temperatures and axial load results in more energy dissipation than the action of fire exposure alone.展开更多
Peculiar color and form of Leizhou red-brick folk dwelling distinguishes it from other vernacular dwellings in Lingnan region(south of the Five Ridges, referring to the current Guangdong and Guangxi). The fi re-sealin...Peculiar color and form of Leizhou red-brick folk dwelling distinguishes it from other vernacular dwellings in Lingnan region(south of the Five Ridges, referring to the current Guangdong and Guangxi). The fi re-sealing gable wall(hereinafter referred to as fi re-sealing wall) in brilliant colors, diversifi ed forms and exaggerated shapes is a remarkable symbol of local dwellings. Originating from Fulao traditional vernacular dwelling and inheriting its advantages, fi re-sealing wall of Leizhou red-brick vernacular dwelling has shown diversity for the infl uence of immigrants, regional cultures, social background and economic status, and formed its own features in color, form and decoration. On the basis of fi eld investigation, this paper described diversifi ed features of the fi re-sealing wall of Leizhou red-brick vernacular dwelling, analyzed the causes of its diversity from the perspectives of aesthetics, function and technology, and explored the harmonious living philosophy implied by its function, form and art.展开更多
基金Project(200801410005) supported by Doctoral Foundation of Ministry of Education of China
文摘The effects of fire exposure,reinforcement ratio and the presence of axial load under fire on the seismic behavior of reinforced concrete(RC) shear walls were investigated.Five RC shear walls were tested under low cyclic loading.Prior to the cyclic test,three specimens were exposed to fire and two of them were also subjected to a constant axial load.Test results indicate that the ultimate load of the specimen with lower reinforcement ratio is reduced by 15.8%after exposure to elevated temperatures.While the reductions in the energy dissipation and initial stiffness are 59.2%and 51.8%,respectively,which are much higher than those in the ultimate load.However,this deterioration can be slowed down by properly increasing reinforcement due to the strength and stiffness recovery of steel bars after cooling.In addition,the combined action of elevated temperatures and axial load results in more energy dissipation than the action of fire exposure alone.
基金Sponsored by General Program of National Natural Science Foundation of China(51278194)
文摘Peculiar color and form of Leizhou red-brick folk dwelling distinguishes it from other vernacular dwellings in Lingnan region(south of the Five Ridges, referring to the current Guangdong and Guangxi). The fi re-sealing gable wall(hereinafter referred to as fi re-sealing wall) in brilliant colors, diversifi ed forms and exaggerated shapes is a remarkable symbol of local dwellings. Originating from Fulao traditional vernacular dwelling and inheriting its advantages, fi re-sealing wall of Leizhou red-brick vernacular dwelling has shown diversity for the infl uence of immigrants, regional cultures, social background and economic status, and formed its own features in color, form and decoration. On the basis of fi eld investigation, this paper described diversifi ed features of the fi re-sealing wall of Leizhou red-brick vernacular dwelling, analyzed the causes of its diversity from the perspectives of aesthetics, function and technology, and explored the harmonious living philosophy implied by its function, form and art.
