防连续倒塌设计在张弦结构中的应用  

APPLICATION OF PREVENTING PROGRESSIVE COLLAPSE IN BEAM STRING STRUCTURE

作　　者：赵楠[1] 马凯 李婷[1] 杨勇[1] 胡正平[1] 

机构地区：[1]北京市建筑设计研究院,北京100045 [2]哈尔滨工程大学航天与建筑工程学院,哈尔滨150001

出　　处：《钢结构》2011年第5期38-40,44,共4页Steel Construction

摘　　要：介绍张弦结构防连续倒塌设计,主要分析结构在正常使用和局部失效两种状态下的受力性能。结合克拉玛依市科技博物馆大跨度空间张弦结构,进行正常设计情况下受力分析,在此基础上分析任一榀拉索失效后,结构防连续倒塌状态下的受力性能。结果表明,正常设计情况下结构安全可靠,且具有一定的安全储备。拉索失效区域的次梁内力超过塑性极限承载力,达到破坏;其他榀张弦梁未超过极限承载力,并未发生破坏,不会出现连续倒塌情况。Design of progressive collapse prevention for beam string structure usually contains structural mechanical behavior under two conditions of normal operation and local failure. According to spatial beam string structure of science museum in Kelamayi, force analysis on normal condition was carried out. On this basis, the mechanical behavior on the condition of preventing progressive collapse was analyzed under the assumption of one cable failed. The results show that the structure is safe and reliable, and the safety reserve is enough on normal condition. Secondary beams breakdown where the cable failed and its internal forces are higher than plastic ultimate strength. Internal forces of other beam string structures are lower than ultimate strength, progressive collapse can be avoided.

关 键 词：连续倒塌 张弦梁 预应力 

分 类 号：TU375.4[建筑科学—结构工程]