水平低周反复荷载作用下棉花秸秆草砖填充墙对框架结构抗震性能的影响  

Stress Impact Performance of Cotton Straw Bale Filled Wall for Frame Structure under Low Cyclic Load

作　　者：冯勇[1] 付彬彬[1] 晋强[1] 史阳光 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《材料科学与工程学报》2016年第5期761-766,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51268056);新疆水利水电重点学科基金资助项目(XJZDXKSLSD2012-13)

摘　　要：本文分别对按1/2比例制作的1榀内填棉花秸秆草砖的框架结构墙体和1榀纯混凝土框架进行水平低周反复荷载作用下的抗震性能试验,研究棉花秸秆草砖填充墙对框架结构的承载能力、刚度、延性、耗能等抗震性能的影响,试验结果表明棉花秸秆草砖与外框的黏结性能能减缓墙体的破坏速度,两者黏结性能破坏时,草砖也未退出工作仍能与外框共同抵抗外力作用;草砖的弹性模量小,因此墙体的滞回曲线比纯框架墙体"捏拢"现象更明显;草砖能增强框架结构的延性和耗能性能并有效提高墙体刚度。In order to study stress impact performance （seismic assistance） of concrete Irame structure filled with cotton straw bales, two wall specimens were prepared, one was the wall of concrete frame filled with cotton straw bricks, the other was only the reinforced concrete frame without filler. Pseudo-static test under low level cyclic loading was performed to study the seismic performance of the two wall specimens. Those main indexes including bearing capacity, stiffness, ductility, energy dissipation and so on were obtained from the test. The experimental results show that the bonding between the cotton straw bricks and the frame can slow down the failure rate of the wall, even when the bonding is lost the cotton straw bricks can also resist external force together with the frame. The pinch phenomenon about the hysteresis curve of the cotton straw brick frame concrete wall is more obvious than that of the pure frame wall because of low elastic modulus of the cotton straw bricks. The cotton straw brick not only can improve the ductility and energy dissipation of the frame but also effectively enhance the stiffness of the wall.

关 键 词：棉花秸秆草砖 水平低周反复荷载 抗震性能 承载力 滞回曲线 延性 刚度 耗能 

分 类 号：TU375.4[建筑科学—结构工程]