| In recent twenty years, CFT (concrete-filled tube) structure has been popularly applied in variety fields of engineering. In high and high-rise building construction, because the CFT column has special formation, the study on beam-to-column joint have been carried out all over the world. Today there are more than twenty joints have been applied in practical, and these joints are assumed as pinned or rigid in frame analysis. We need to attach importance to the rationality and the effect on frame analysis of these assumptions.As a part of National Natural Science Foundation of China "the study on restraining stiffness of joints of CFT frame", this paper focused on the study of restraining stiffness of continuous web plate joint of CFT frame. This type of joint has been recommended by the code CECS28:90. Firstly, four 1:3 scale joints were tested by using static test method. Experimental results showed the semi-rigid characteristic and transmutation state of connection areas of continuous web plate joint. Also we gained the moment-rotation(M- 9 ) curves . Secondly, a finite element study on the joint was made by using ANSYS. To verify the accuracy of the analytical models, results were compared to the previous test data. Finally, we analyzed the influence factors, such as the dimensions of beam and column, how they affect restraining stiffness of joint. As a result, this paper gained an appropriate finite element mode and some moment-rotation(M- 9 ) curves that indicated the influence factors.In this subject, we used means to gain the information of restraining stiffness of joint as follows:1. A finite element models of joint was made by using ANSYS,2. We verified the accuracy of the analytical models by comparing to the test data.3. We analyzed the influence factors by using the verified models.In this way ,we can acquire the needed information of the restraining stiffness avoiding large quantity and repeated tests. |
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