【摘要】 密肋复合墙是密肋壁板结构体系的主要抗侧力构件,复合墙在荷载作用下的刚度退化规律是研究密肋结构体系抗震性能的基础性问题之一.由1/2比例密肋复合墙体低周反复荷载试验,得出了复合墙各个特征点刚度和从加荷到破坏全过程的三阶段刚度退化规律,分析了轴压比等因素对复合墙刚度退化的影响,即轴压比越大,剪跨比、外框架截面及配筋、肋柱(梁)数量及配筋越小,刚度退化速度越快,反之则越慢;同时给出了复合墙刚度退化曲线指数表达式和各变形阶段的退化系数表.讨论了改善施工工艺、采用纤维填充材料等延缓复合墙刚度退化速度的方法,为密肋壁板结构体系的工程应用提供了参考.更多还原

【Abstract】 Multi-ribbed composite wall is the main anti-lateral force component in multi-ribbed slab structure system and the law of its stiffness degradation under load is one of the fundamental problems about seismic performance of multi-ribbed slab structures.Low-cyclic reversed loading tests were conducted on composite wall samples with the ratio of 1∶2,in which the characteristic point stiffness and the law of their stiffness degradation process from load-ing to failure were studied,and the effect of main influencing factors such as axial compression ratio on the wall stiffness degeneration was analyzed.The results show that with the increase of axial compression ratio,the decrease of the shear span ratio,outside frame section and its reinforcement ratio,rib column(beam)quantity,the speed of stiff-ness degradation increased.Otherwise it decreased.The stiffness degradation formula and degradation coefficients in different deformation stages were presented and methods to delay stiffness degradation with construction technique improvement and fibers as stuffing materials were also discussed.The study has provided reference for the application of multi-ribbed slab structure.更多还原