摘要
为研究地震作用下型钢混凝土异形柱-钢梁框架节点的地震损伤演化规律,进行了4个L形、4个T形型钢混凝土异形柱-钢梁框架节点的抗震性能试验。基于低周反复荷载试验研究结果,研究了试件循环加载过程中变形和能量的非线性组合关系,通过引入加权指数考虑变形损伤与能量累积损伤的权重变化,考虑配钢率、配箍率、轴压比、配钢形式等因素,建立了能够较好反映地震作用下型钢混凝土异形柱-钢梁框架节点损伤演化规律的非线性损伤模型,并给出了具体的地震损伤模型表达式。基于提出的地震损伤模型对试验试件进行了地震损伤指标验算,表明模型能够较好地描述型钢混凝土异形柱-钢梁框架节点的地震损伤演化全过程,研究结果为该类结构地震损伤评估及抗震设计提供了理论依据。
In order to study the damage assessment mechanism of SRC special shaped column frame joints under earthquake, seismic performance tests are carried out on 4 columns frame joints with T-shaped section steel and 4 with L-shaped section steel. According to the results of the test, the nonlinear combination of deformation and energy is analyzed. By introducing the index of deformation damage and cumulative energy damage, the double parameters model is established which can reasonably reflect damage evolution of SRC special shaped column frame joints. Steel ratio, stirrup ratio, axial compression ratio and shaped-steel layout are considered. Specific expression of earthquake damage model and checking calculation on seismic damage index are given and the validity of the damage model is verified. It shows that the damage model can adequately describe the all processes of the seismic damage evolvement and the damage degree of SRC special shaped column frame joints. It provides a theoretical basis for the seismic damage assessment and seismic design of this kind of structures.
出处
《工程抗震与加固改造》
北大核心
2017年第2期18-23,共6页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51378077)
湖北省自然科学基金创新群体项目(2015CFA029)
湖北省教育厅科学研究计划重点项目(D20161305)
