钢筋混凝土框架结构抗连续倒塌能力评估  

Assessment of progressive collapse resistance capacity of RC frame structures

作　　者：张传爱 方秦[2] 张亚栋[2] 

机构地区：[1]工程兵学院,徐州221004 [2]解放军理工大学工程兵工程学院,南京210007

出　　处：《防护工程》2012年第2期30-34,共5页Protective Engineering

基　　金：国家自然科学基金重点项目（50638030,90815010）;国家科技支撑计划（2006BAJ13B02）;江苏省自然科学基金创新学者攀登项目（BK2008002）

摘　　要：对某钢筋混凝土框架结构底层柱发生突然破坏后结构整体的破坏过程进行了数值模拟，评估不同局部破坏位置、不同局部破坏程度时结构可能发生的破坏情况，评价既有建筑物抵抗连续倒塌的能力。结果表明：根据现有规范设计的7度抗震钢筋混凝土框架结构，底层单一柱破坏后结构仍具有较好的整体性，结构没有倒塌；损伤局限在破坏柱所在跨内，但各框架柱在结构中的位置不同其重要性也不同；角柱失效影响最大，短边中柱失效影响最小；底层相邻多根柱失效会引起结构大面积的连续倒塌。The dynamic failure process of a typical RC frame structure was simulated numerically under sudden bottom column failure scenarios. The influences of damage location and damage level on the whole and local structure damage as well as the progressive collapse resistance were evaluated. The results showed that, based on the anti 7 degree earthquake design codes, the whole structure kept its integrity and the disproportionate collapse did not occur when a single bottom column failed. The damage range was limited to the bays adjacent to and above the col- lapsed columns. However frame columns at different locations in the structure are of different importance ： the corner column has a more obvious effect on the stability of the structure compared with the middle column of the shorter edge. The collapse of more than one neighboring columns would lead to the progressive collapse of the structure.

关 键 词：钢筋混凝土 框架结构 连续倒塌 数值模拟 

分 类 号：TU375.2[建筑科学—结构工程]