方钢管混凝土柱-钢梁外环板式节点地震损伤模型研究  

Seismic Damage Model of Connections Between Concrete-filled Square Steel Tubular Columns( CFSSTCs) and Steel Beams with External Diaphragms

作　　者：别雪梦 何明星[1,2] 吴方红[1,2] 张继承 杜国锋[1,2] BIE Xue-meng;HE Ming-zcing;WU Fang-hong;ZHANG Ji-cheng;DU Guo-feng(School of Urban Construction,Yangtze University,Jingzhou 434023,China;Structural Engineering and Disaster Prevention Research Institute,Yangtze University,Jingzhou 434023,China)

机构地区：[1]长江大学城市建设学院,荆州434023 [2]长江大学结构工程与防灾研究所,荆州434023

出　　处：《武汉理工大学学报》2017年第8期58-64,共7页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51378077);湖北省自然科学基金(创新群体)(2015CFA029;2016CFA022)

摘　　要：为研究方钢管混凝土柱-钢梁外环板式节点在地震荷载作用下的损伤破坏机理,对比分析现有双参数地震损伤模型,根据方钢管混凝土柱-钢梁外环板式节点的破坏特征,选取最大非弹性变形和累积滞回耗能建立能反映结构性能退化和累积损伤的地震损伤模型,对节点失效破坏进行定量评估。该模型在如下所研究参数范围内可较好地反映方钢管混凝土柱-钢梁外环板式节点在极限状态下的地震损伤情况:f_y:393~526 N/mm^2,f_(cu):53.4~73.4 N/mm^2,t:6~12mm,ξ_p:1.5~3.4,h_(slab):0~120 mm,n:0~0.8,h/B:0.7~2.0。结果表明,该模型具有实用性,可为工程设计提供实际依据。To research the damage mechanics on connections between concrete-filled square steel tubular columns（ CFSSTCs） and steel beams with external diaphragms under seismic load,a seismic damage model was proposed. The existing two parameters seismic damage models were compared and analyzed. According to the failure characteristics of the connections with external diaphragms between CFSSTCs and steel beams with RC slabs,the maximum inelastic deformation and cumulative hysteretic energy were chosen to establish seismic damage model which can reflect structural performance degradation and cumulative damage. Finally,the failure of connections was evaluated quantitatively. Seismic damage behavior of the connections with external diaphragms between CFSSTCs and steel beams with RC slabs at the ultimate state is well reflected by seismic damage model. The application scopes of seismic damage model presented are： fy： 393-526 N/mm-2,f（cu）： 53.4-73.4 N/mm-2,t： 6-12 mm,ξp： 1.5 - 3.4,h（slab）： 0-120 mm,n： 0-0.8,h/B： 0.7-2.0. It is found that the model is practical and can provide practical basis for engineering design.

关 键 词：方钢管混凝土柱-钢梁外环板式节点 地震损伤模型 最大非弹性变形 累积滞回耗能 

分 类 号：TU317.1[建筑科学—结构工程]