钢管混凝土框架实用荷载-位移恢复力模型研究  

RESEARCH ON PRACTICAL RESILIENCE MODEL OF LOAD VERSUS DISPLACEMENT FOR CONCRETE FILLED STEEL TUBULAR FRAME

作　　者：王文达[1,2] 韩林海[2] 

机构地区：[1]兰州理工大学土木工程学院,兰州730050 [2]清华大学土木工程系,北京100084

出　　处：《工程力学》2008年第11期62-69,共8页Engineering Mechanics

基　　金：高等学校博士学科点专项科研基金项目(20070003087);中国博士后基金项目(20080430404)

摘　　要：根据钢管混凝土柱-钢梁平面框架在恒定轴力与水平低周往复荷载共同作用下的试验结果,分析了钢管混凝土框架典型的水平荷载-水平位移滞回关系曲线的特征。基于非线性有限元理论,对影响钢管混凝土框架荷载-位移骨架曲线的主要因素进行了分析,结果表明:钢管混凝土柱含钢率、钢材强度、混凝土强度、柱轴压比、长细比、梁柱线刚度比及梁柱强度比等参数对钢管混凝土框架的荷载-位移骨架曲线有较大的影响。基于系统的参数分析结果,该文建议了单层钢管混凝土框架的荷载-位移恢复力模型。荷载-位移骨架曲线模型及滞回曲线模型的计算结果得到了试验及精确理论计算结果的验证。The typical character of hysteretic curves of lateral load-displacements （P-A） was analyzed based on the experimental results of the planar composite frame, composed of concrete filled steel tubular （CFST） columns and I shape steel beam under sustaining axial load and cyclic lateral load. Parametric study is performed about the factors pertinent to the behavior of load-displacement envelop curves of CFST frames based on nonlinear finite element theory. The results show that the parameters, such as the steel ratio of the CFST column, strength of steel and concrete, the axial load level and slenderness ratio of the CFST column, the ratios of the beam to column linear stiffness and the beam to column strength, etc., have a influence on the behavior of load^isplacement envelop curves. The load-displacement hysteretic model of one story CFST composite frame is established based on the systematic parametric analytical results. The envelop curve model and hysteretic relationship model are verified by experimental and accurate theoretic results respectively.

关 键 词：钢管混凝土 钢梁 框架 骨架曲线 滞回性能 参数分析 恢复力模型 

分 类 号：TU398[建筑科学—结构工程] TU528.59