FULL-SCALE TESTS OF BEAM-COLUMN-SLAB JOINTS UNDER REVERSED-CYCLIC LOADING
Two full-scale reinforced concrete beam-column-slab joints were designed according to a strong column- weak beam and a strong joint-weak element philosophy, which were tested under cyclic lateral loading. The main objective was to investigate the effect of slab on seismic performance of beam-column joint. Performance of the specimens was evaluated in terms of overall strength, stiffness degradation, energy dissipation, failure mode, displacement ductility. The two specimens exhibited a strong column-weak beam failure mechanism. Both joints failed due to concrete crushing and rupture of longitudinal bars as a result of plastic hinges at the beam end. The overall displacement ductility of the interior joint reached about 6.61～7. 16, that of the exterior joint was about 4.42～4. 39, indicating that both specimens behaved in a ductile manner. The test specimens exhibited fatter load vs. displacement hysteretic response, and showed large energy dissipation. The rate of stiffness degradation was greatest before about0.5％ story drift in both specimens. The slab reinforcement parallel to the main beam was found to contribute significantly to the negative flexural moment capacity of the beam. In general, the performance of both joints was satisfactory.
Beam-column-slab joints cyclic loading stiffness degradation failure mode displacement ductility energy dissipation
X. L. Yang W. C. Xue
Department of Building Engineering, Tongji University, Shanghai, China
国际会议
上海
英文
824-831
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）