SUN Weimin1 GUO Zhanggen1 SHEN Dan1 LUO Yu1
1 College of Civil Engineering, Nanjing University of Technology, China, Email: zhgguo@163.com
ABSTRACT
The problem of the restraint on the beam end from walls for structural masonry buildings with Reinforced Concrete floors has been examined. An experimental study of the restraint on the beam end is described in this paper. The test model is a two-story, one-span masonry structure. The restraint on the beam end, the failure process and failure mode, and the variation in restraining moment and the angle of rotation on the beam were studied. The moment and deflection at the span center were analyzed, and compared with calculated values according to the building code. At the same time, a finite element method (FEM) analysis for evaluating the load deformation process was presented. The restraint due to the nature of the joint, the embedment length of the beam in the wall and the stress on the wall were all studied and were discussed. The effect on the beam restraining moment from increasing the axial stress on the upper wall was obtained. The analytical and experimental results also indicate that a restraining moment exists on the beam end, and that this moment varies with increasing load. The restraining moment on the beam was shown to be affected by the beam stiffness, masonry stiffness, the embedment length of beam in the wall, axial load on the wall, and the nature of the connection of the beam to the wall.
KEYWORDS: composites structure; restraint on the beam end; finite element analysis
B8-4
