Preliminary Test And Nonlinear Analysis Research On The Beam-wider-wall Joint

Frame and shear wall structures are very popular in multi-story buildings. To the present, however, Most research about the shin-walled and special shaped column or shear wall is focus on the member's mechanism and analysis method. And the research on beam-wider-than-wall joint is few and can not satisfy the application requirement.Based on the elastic finite element analysis of the beam-wider-than-wall joint, two specimen are designed to test the joint behavior. The stress distribution, deformation, failure model and mechanism are described clearly in the test result. It indicates the anchorage length according to CONCRETE CODE (GB50010-2002) cannot meet capacity and deformation demand. At the same time, this paper utilizes the ANSYS to simulate nonlinear behavior of these joints and test outcomes are validated from the simulation. The work done in this paper is mainly as follows:(1) The wide beam should intrude to the wall at some length to make the flexural stress uniform along beam section width, thus make full use of the beam's bearing capacity and avoid the shear failure in the concrete joint. And it also prevents stress focus and concrete crack in the local shear wall.(2) The anchorage condition of the upper longitudinal bar in the beam outside the wall 's width is disadvantage. And the anchorage length prescribed in the CODE cannot ensure bearing capacity and ductility of joints.(3) The beam stirrups are very important to the anchorage of the upper longitudinal bar in the beam outside the wall 's width. If the quantity of the beam stirrups is not enough, the wide beam would have more crack in the joint area thus decrease bearing capacity and ductility of joints.