钢管混凝土柱-梁连接节点弯矩-转角关系计算方法

CALCUATIONS FOR MOMENT VERSUS ROTATION RELATIONSHIP OF THE JOINT OF BEAM AND CONCRETE-FILLED STEEL TUBULAR COLUMN

分别建立了钢管混凝土柱-外环板式钢梁和钢筋环绕式钢筋混凝土梁连接节点的有限元数值分析模型,理论计算得到了试验结果的验证。基于理论模型,分别对影响此两类节点力学性能的主要因素进行了系统参数分析,明晰了各主要参数对节点弯矩-梁柱相对转角关系的影响规律,提出了此两类节点的节点弯矩-转角关系的实用计算模型,结果表明:实用模型和数值模拟结果总体上吻合良好。

A finite element model （FEM） is developed for the connections between a concrete-filled steel tubular column and a steel beam as well as a reinforced concrete beam by the base of experimental research. The results from the FEM model are match well with the test results. Parametric study is performed for those two kinds of composite joints based on the FEM model. Some useful conclusions were developed from the parametric analysis for the two kinds of joints. A simplified model for the calculation of the relationship between the bending moment and its corresponding rotation at a joint connecting a beam and a column was proposed based on the parametric study. The proposed model has similar precision with the numerical results by FEM,but a very simpler expression to determine the moment-ratation relationship.