方钢管混凝土柱-工字型钢梁节点荷载-位移滞回曲线建模与分析  

Modelling and Analysis of the Load-displacement Hysteretic Behavior of Concrete-filled Square Steel Tubes to Steel I-section Beam Joints

作　　者：王翠翠 刘忠[2] 

机构地区：[1]武汉市欧乐建筑设计有限公司,武汉430000 [2]湘潭大学土木工程与力学学院,湖南湘潭411105

出　　处：《工程建设与设计》2014年第7期59-64,共6页Construction & Design for Engineering

摘　　要：针对钢管混凝土柱-钢梁节点的梁端荷载-位移滞回曲线多采用试验数值分析方法,缺乏理论建模分析的不足,提出一种方钢管混凝土柱-工字型钢梁节点荷载-位移滞回曲线的建模与分析方法。该方法分析钢筋混凝土梁柱节点梁端位移的建模方法,提出节点构件梁端荷载-位移的计算模型,并采用T-L双线性模型建立节点构件的弯矩-曲率恢复力的计算模型,同时,提出钢梁节点荷载-位移滞回曲线分析流程。以典型的方钢管混凝土柱-工字型钢梁缀板连接节点为例,采用提出的节点荷载-位移计算模型计算节点荷载-位移滞回曲线,并采用ANSYS建立其三维有限元数值分析模型,对节点构件滞回性能进行非线性有限元数值仿真模拟。理论计算、仿真模拟和静态试验对比分析的结果表明:采用提出模型计算的荷载-位移滞回曲线和骨架曲线与仿真模拟及试验数据结果的吻合度高,能够反映出节点受力的基本特性。In the light that the the load-displacement hysteretic behavior（LDHB） of concrete-filled square steel tubes to steel I-section beam joints（CFSST-SIBJ） employ experiment-based numerical analysis, lacking theoretical LDHB modeling of CFSST-SIBJ, this paper presents the modeling and analysis for the LDHB of the CFSST-SIBJ. Following the basic idea of the modeling of the beam-end displacement of the reinforced concrete beam-column joints, this study develops a calculation model of the beam-end load-displacement of joints（BLDJCM）, while the T-L Bilinear Model is introduced to model the moment-curvature force of joints. Then, an analysis algorithm of the LDHB of steel beam joints is proposed. Taking battened connection joints of typical concrete-filled square steel tubesI-section steel beam for example, the load-displacement hysteresis curve of joints is caculated via the proposed BLDJCM, and the ANSYS-based numerical simulation model of three-dimensional non-linear FEM analysis is developed to simulate the LDHB of joint component. The comparation results between theoretical calculation, ANSYS simulation and quasi-static experiment indicate that the hysteresis curve and skeleton curve of load-displacement calculated by the proposed BLDJCM match well with those of the ANSYS simulation and quasi-static experiment, and the proposed model has the potential in revealing the basic characteristics of the joints force.

关 键 词：方钢管混凝土 梁柱节点 滞回曲线 恢复力模型 有限元分析 

分 类 号：TU375.1[建筑科学—结构工程] TU375.3