钢筋混凝土壁式框架抗震性能研究及其控制

依据“钢筋混凝土抗震结构的机构控制理论”设计了一榀两跨三层壁式框架,采用“双控连梁”同时在墙肢底部嵌入“人工塑性铰”,进行了低周反复倒三角形比例加载试验及理论分析。证明了“机构控制理论”对R.C.壁式框架的可行性,双控连梁的破坏型态由通常的剪切型变为弯曲型,其延性显著提高,最终形成梁式侧移机构,使结构吸能耗能能力得到了改善。编制了考虑刚域、轴向及剪切变形影响的壁式框架弹塑性全过程分析电算程序,采用包括刚度下降段的扩展Clough单元模型,对变形后期的大变形、结构整体延性及局部延性进行了计算,其结果与试验吻合较好。

Aseismic Bchavior Investigation and Controlled Design for R.C.Wall-Shaped Frame

Based on the "Controlled Mechanism Theory of Aseismic ElastoplasticR. C. Structures", a 2-span 3-storey specimen of R. C. wall-shaped frame with"Double-controlled Coupling Beams" and the "Artificial Plastic Hinges" installed in thebases of walls is tested under low cycling triangular loading. Theoretical analysis and ex-perimental study show the feasibility of the "Controlled Mechanism Theory" used in suchstructures. Using this special design could transfer the shear failure pattern of couplingbesms into flexural, obtain a "Beam-Sidesway Mechanism", and improve the ability ofstrcture absorbing and dissipating carthquake energy as well as its ductility. A computerprogram of clastoplastic full analysis considering the influence of rigid zone and the axialand shcar deformation has been worked out for the test specimen. The largedeformation, the partial and entire ductility are calculated by using the improved CloughElement Model with softened rigidity. The result of calculation and that of test are con-formed one another.