| Title |
Evaluation of Collapse Mechanism and Maximum Strength for Column-Beam Moment Connection of Steel Structures by Plastic Analysis of Continuum |
| Authors |
Lee Sang-Ju ; Han Sang-Eul |
| Keywords |
Connection of Steel Structures ; High-Strength Bolt Connection ; Plastic Analysis ; Collapse Mechanism ; Yield Line Theory ; Fractural Condition |
| Abstract |
Connection of steel structures form complicatedly in many cases, they are important part to transmit various stresses. It is indispensable in design of steel structures to evaluate strength of connection. To evaluate strength of connection, the theory of plastic analysis of continuum under in-plane or out-of-plane load can apply to this evaluation. In Plastic Analysis of continuum, internal forces are found by virtual work formulate apply to assumed collapse mechanism. Connection of steel structures is consist of steel members which are consist of plate elements using welding or bolt connection, and plate elements which consist steel members can be treated to 2-dimensional plate elements. So in this study plate elements are treated to 2-dimensional exercise like plate-stress or plate-deflection. Lee(2005) valued maximum internal force by plate with holes collapse mechanism based on plastic theory. By expanding this, the study tried to evaluate internal force of steel structure connection and tried to evaluate maximum internal force of pre-installed rib and welded part. It is necessary to possess internal forces exceed internal forces of each member for steel structures display needed capacity, and this is a premise for design . Maximum internal forces become an index premise plasticity of composed members. In this study, we are going to evaluate internal forces of L-shape joint element. Yield line theory apply to evaluation of internal forces. Yield line theory originated in plastic analysis of general plates has an advantage which it presents evaluation formula of internal forces. In this study, first of all, we present internal forces evaluation formula of yield line, plastic zone, yield line or plastic zone which has curvature, and evaluate differences between L-shaped joint element which has rib and L-shaped joint element which does not has rib using connection of steel structures. Provided formula is estimated to be a foundation for decision of dimensions at designing connections. |