基于关键参数变化的生态复合墙体抗震性能试验研究  

EXPERIMENTAL RESEARCH ON SEISMIC BEHAVIORS OF ECOLOGICAL COMPOSITE WALLS BASED ON THE CHANGE OF KEY PARAMETERS

作　　者：张程华[1,2] 黄炜[1] 赵冬[1] 张奇[1] 张荫[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安科技大学建筑与土木上程学院,陕西西安710054

出　　处：《工程力学》2013年第11期166-172,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50908188,51178385);国家“十二五”科技支撑项目(2012BAJ16B02);陕西省重点学科建设专项资金项目(E01001,E01003)

摘　　要：通过4榀1/2比例内填秸秆泥坯砌块生态复合墙体在水平低周反复荷载作用下的抗震性能试验,研究生态复合墙体在低周反复荷载作用下的受力特点和破坏机制,对比分析不同关键因素变化的生态复合墙体的承载力、滞回特性、延性、强度退化、刚度退化和耗能等抗震性能;试验结果表明:秸秆泥坯砌块、框格、隐形框架在试验的弹性阶段、弹塑性阶段、破坏阶段依次发挥作用,使复合墙体具有多道抗震防线;框格较密的ECW-3发生"强板弱柱"弯曲型破坏,高宽比较大的ECW-4发生弯剪型破坏,均属不利破坏,在设计过程中应注重框格的划分及墙板高宽比的控制;4榀墙体从屈服阶段到破坏阶段,等效粘滞阻尼系数均有较明显的增大,都具有较强的耗能能力。The aseismic behavior of four 1/2 scale models of ecological composite walls with straw nippy blocks is tested under low-frequency cyclic loading. The stress characteristics and failure mechanism of the specimens are researched. Besides, the aseismic performance comparative analysis on the ecological composite walls with different change of key parameters are made, such as bearing capacity, hysteretic loops, displacement ductility, deterioration of strength and stiffness, energy dissipation and so on. The experiment results show that the straw nippy blocks, ribbed grids and end frames in ecological composite walls play very important roles in turn in an elastic stage, an elastic-plastic stage and a failure stage of the experiment, which indicates that the ecological composite wall has several seismic defending lines. The ECW-3 wall, in which the distance is small between ribbed grids, is flexural failure; the ECW-4 wall, in which the height-width ratio is bigger, is flexural- shear failure; ECW-3 and ECW-4 walls are unfavorable failures. The ribbed grid divided and height-width ratio controlled should be focused on in the design process of ecological composite walls. The equivalent viscous damping coefficients of four walls all have obviously increased from a yielding stage to a failure stage, and thathave great energy dissipation capacity.

关 键 词：生态复合墙体 秸秆泥坯砌块 低周反复荷载 关键参数 抗震性能 

分 类 号：TU318[建筑科学—结构工程]