【摘要】 针对密肋复合墙的构造特点及在地震作用下"砌块-框格-外框"的破坏顺序,提出利用加气混凝土砌块置换墙体中破坏的砌块以恢复和提高受损密肋复合墙结构抗震性能的加固方法。对加固后的密肋复合墙进行了低周反复荷载试验,分析了墙体破坏过程和钢筋应变状况,重点研究了加固后复合墙的滞回曲线特点及承载力、刚度、延性等抗震性能,并与空框格框架、标准密肋复合墙进行了对比分析。试验结果表明,加固后复合墙的破坏特点、裂缝形成和分布规律与标准复合墙相似,主要抗震性能指标均接近或基本等同于标准复合墙;采用加气混凝土砌块(或其它满足设计强度要求的轻质砌块)置换加固受损密肋复合墙的方案是可行的。利用砌块置换加固受损密肋结构的方法效果明显、施工简便、经济实用,可为今后地震灾区密肋结构的抗震加固提供借鉴。更多还原

【Abstract】 Based on the construction feature and "block-frame-outer frame" failure characteristics of the multi-ribbed composite wall,the strengthen method for damaged multi-ribbed composite wall with aerated concrete blocks to recovery and enhance the seismic performance of the structure was proposed.Through cyclic loading tests on strengthen composite wall,the failure process and steel bars strain were analyzed,and the hysteretic curve character and seismic performance such as bearing capacity,stiffness,ductility and so on were researched mainly.Test results showed that the failure and cracks distribution characters of the strengthen composite wall were similar to the standard wall,and the main seismic performance index was close to or equal to the standard wall.It was effective using aerated concrete blocks(or other blocks with a certain strength) to strengthen the damaged composite wall.The strengthen method is effective,convenient and cost cheap,and provides reference to strength the multi-ribbed composite wall structure in earthquake area.更多还原