低周反复荷载下再生混凝土密肋复合墙体抗震性能试验研究
|
摘要
对3榀1∶2比例模型,再生骨料取代率分别为100%、50%和0的密肋复合墙体,进行低周反复水平荷载作用下的抗震性能对比试验。研究了再生混凝土密肋复合墙体的破坏机制、承载力、延性、滞回特性、耗能及刚度退化等性能,建立了再生混凝土墙体的退化三线型恢复力模型。研究发现:墙体属于剪切破坏;对于最大水平承载力,50%取代率的墙体和普通混凝土墙体相比没有下降,而100%取代率墙体承载力下降18%;对于延性系数,随着取代率的增加而提高;对于耗能能力,3榀墙体差别不大。试验表明:50%取代率密肋复合墙体具有良好的抗震性能,应用于实际工程完全可行;而100%取代率墙体需慎用。
Under low-cyclic horizontal loading,three recycled concrete multi-ribbed composite walls(composed of 100%,50%,0 recycled aggregate) are studied in this paper.The seismic behaviors of recycled concrete multi-ribbed composite walls,such as the failure patterns,hysteretic loop,ductility,deterioration of stiffness and energy dissipation,etc.,are examined.Finally,tri-linear retrograde restoring force model of the recycled concrete wall is established.The test results indicate: the failure pattern of the multi-ribbed wall using recycled concrete is shearing failure;the maximum horizontal bearing capacity of the recycled concrete multi-ribbed wall,composed of 50% recycled aggregate,is no less than the natural concrete wall,however,the bearing capacity of the wall,composed of 100% recycled aggregate,is lowered by 18%;ductility factors increase as the replacement rate of recycled aggregate increase;the three multi-ribbed walls have no difference in energy dissipation.This study concludes that the recycled concrete multi-ribbed wall,whose displacement rate is 50%,has better seismic properties and is quite feasible for practical civil engineering;the recycled concrete multi-ribbed wall,whose displacement rate is 100%,should be used carefully.
Under low-cyclic horizontal loading,three recycled concrete multi-ribbed composite walls(composed of 100%,50%,0 recycled aggregate) are studied in this paper.The seismic behaviors of recycled concrete multi-ribbed composite walls,such as the failure patterns,hysteretic loop,ductility,deterioration of stiffness and energy dissipation,etc.,are examined.Finally,tri-linear retrograde restoring force model of the recycled concrete wall is established.The test results indicate: the failure pattern of the multi-ribbed wall using recycled concrete is shearing failure;the maximum horizontal bearing capacity of the recycled concrete multi-ribbed wall,composed of 50% recycled aggregate,is no less than the natural concrete wall,however,the bearing capacity of the wall,composed of 100% recycled aggregate,is lowered by 18%;ductility factors increase as the replacement rate of recycled aggregate increase;the three multi-ribbed walls have no difference in energy dissipation.This study concludes that the recycled concrete multi-ribbed wall,whose displacement rate is 50%,has better seismic properties and is quite feasible for practical civil engineering;the recycled concrete multi-ribbed wall,whose displacement rate is 100%,should be used carefully.
引文
[1]西安建筑科技大学.密肋壁板轻型框架结构理论与应用研究[R].西安建筑科技大学,2000.
[2]《小康住宅建筑结构体系成套技术指南》编写组.小康住宅建筑结构体系成套技术指南[M].北京:中国建筑工业出版社,2001.
[3]田英侠.密肋复合墙板受力性能实验研究与理论分析[D].西安:西安建筑科技大学,2002.
[4]姚谦峰,黄炜,田洁,等.密肋复合墙体受力机理及抗震性能试验研究[J].建筑结构学报,2004,25(6):1-5.
[5]孙跃东,肖建庄,周德源,等.再生轻质砌块填充墙再生混凝土框架抗震性能的试验研究[J].地震工程与工程振动,2005,25(5):124-131.
[6]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[2]《小康住宅建筑结构体系成套技术指南》编写组.小康住宅建筑结构体系成套技术指南[M].北京:中国建筑工业出版社,2001.
[3]田英侠.密肋复合墙板受力性能实验研究与理论分析[D].西安:西安建筑科技大学,2002.
[4]姚谦峰,黄炜,田洁,等.密肋复合墙体受力机理及抗震性能试验研究[J].建筑结构学报,2004,25(6):1-5.
[5]孙跃东,肖建庄,周德源,等.再生轻质砌块填充墙再生混凝土框架抗震性能的试验研究[J].地震工程与工程振动,2005,25(5):124-131.
[6]胡聿贤.地震工程学[M].北京:地震出版社,1988.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心