高温后密肋复合墙体框格单元损伤  

Damage of multi-ribbed composite wall cell after high temperatures

作　　者：孙静[1] 吴君怡 赵秀丽 SUN Jing;WU Junyi;ZHAO Xiuli(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044.China;China Railway Xi'an Group Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国铁路西安局集团有限公司,西安710054

出　　处：《清华大学学报（自然科学版）》2022年第2期285-293,共9页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金面上项目(52078037)。

摘　　要：密肋复合墙结构体系因节能、减震等诸多优点,在中国部分地区得到了广泛应用。火灾会降低建筑的使用性能,严重威胁人民生命财产安全。为了研究高温后密肋复合墙体框格单元(multi-ribbedcomposite wall cell, MCWC)的受力特性,该文以MATLAB为编程平台,计算模型选用MCWC的弹塑性损伤刚架-斜杆模型,定义模型中各子单元高温损伤变量,编制了高温后MCWC受力分析程序MRCS-T,得到高温后MCWC局部损伤值。利用局部损伤值,基于能量分析方法,构造整体损伤指标,据此给出高温后MCWC的5个损伤状态和每个阶段损伤限值,为高温后MCWC承载力的评估提供了理论依据。The multi-ribbed composite wall structure system is widely used in our country as a kind of energy-saving and shock-absorbing prefabricated building. However, the damage caused byfire reduces the performance of the building and seriously threatens the safety of human life and property. To analyze the performance of the multi-ribbed composite wall cell(MCWC) after high temperatures, MATLAB is used as the platform, the rigid framebar model of elastic-plastic damageis selected, the damage variables after high-temperatureof the subunits in the model are defined, and the local damage value of the wall cell after high temperatures is obtained using the MRCS-Tprogram. Based on the energy method and the local damage value, the general damage index is constructed and used to evaluate the damage. The damage state of MCWC after high temperatures is divided into five stages, and the damage limit value of each stage is given, which provides the basis for damage assessment of MCWC after high temperatures.

关 键 词：密肋复合墙体框格单元(MCWC) 高温后 局部损伤指标 整体损伤指标 损伤评估 

分 类 号：TU375[建筑科学—结构工程]