摘要
本文研究了工程中常用的几种梁柱连接方式的M-θ性能以及当采用这些连接方式时对平面钢框架整体受力性能的影响，研究工作主要分为以下几部分：
首先，在建立结构分析模型时，为了能较为精确地模拟结构受力后的性能和状态，本文采用矩阵位移法，在刚度矩阵的建立中采用按照压(拉)弯构件转角位移方程建立的以超越函数表达的刚度矩阵。
其次，在总结国内外大量节点性能实验和仿真分析的基础上，分别对工程中常用的连接方式：外伸端板连接、栓焊混合连接、上下角钢连接、腹板角钢连接和上下角钢+腹板角钢连接提出了根据节点连接几何尺寸、构造措施和最终破坏模态等因素来确定分析参数数值及更能准确描述顶底角钢连接、腹板角钢连接等刚性较弱节点的M-θ关系模型：
最后，在本文提出的弯矩-转角(M-θ)方程和结构刚度矩阵的基础上，分别对采用不同节点连接的平面钢框架的整体承载力进行了数值分析，得出了节点连接性能对钢框架整体性能影响的一般性规律。
根据本文的研究结果，提出了在工程设计中可较为简便地对节点性能进行判定和选择的方法，以及可被设计工作中采用的弯矩-转角(M-θ)四参数方程。
The M-θrelationship of some beam-to-column connections,which are usuallyused in the engineering practice,is studied in the paper.The influence of connections onthe capacity of steel framework is studied also.There are some parts are included asfollowings:
Firstly,the analysis model is built with the mari-displacement method,is used toanalysis the capacity and status of structures with influence of load on it.The element inthe structural stiffness matrix is proposed by transcendental function which is gotten fromthe deformation-rotation function.
Secondly,with the result of simulational analyzed and experimental,the character ofthe connections,such as extended-end plate(EEP),welded-bolted beam-to-column(WBBC),up and bottom angle(UBA),web angle with up and bottom angle(WAUBA),isresearched.The ultimate moment capacity of these connections is discussed on thr base offormer research concultion,and the four-parameter function is provided to describe theconnections',such as UBA,WAUBA M-θrelationship curve as following:
M=M_umlnf(1+R_(ki)-R_p/mM_uθ)+R_pθ,f=(1+R_(ki)-R_p/M_uθ~(1/n))~(15000)
Finally,the simulation analysis has been excusive on the base of M-θfunctionand with structural matrix which are provided in the paper,the general rule has beeninvestigated for the influence on the ultimate load-carrying capacities of steel frame work.
The methods which can be used to judge the capacity of joint in engineering practiceframework simply is provided,and the four-parameter M-θfunction which can be usedin design practice is provided in the paper also.The results of the M-θrelationship ofsome beam-to-column connects analyzed by methods which are presented in this paper areclose to that by experimental methods.
引文
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