高烈度区某超限框架-剪力墙结构中震性能控制

Performance control of an out-of-code frame-shear wall structure under fortification earthquake in high seismic intensity region

以高烈度区某超限框架-剪力墙结构为例,根据超高和复杂程度确定结构具体的抗震性能目标。探讨中震分析时地震动参数的正确取值;对竖向构件进行小震弹性、中震不屈服和中震弹性分析,并将内力结果进行对比;探讨并确定最小剪重比和竖向构件在水平力作用下的拉应力限值。分别对剪力墙、框架柱、连梁和框架梁等构件运用量化的方式阐明其在中震下的受力状态,结果表明结构能满足预定的抗震性能目标。

Taking a frame-shear wall structure in a high seismic intensity region as an example,the specific seismic performance targets of the structure were determined according to the height and the complexity. The right value of the ground motion parameter in the fortification seismic analysis was discussed. The elastic analysis under frequent earthquake,non-yielding analysis under fortification earthquake and elastic analysis under fortification earthquake on the vertical components were conducted,and internal force results were compared. The minimum shear weight ratio and the tensile stress limit of vertical members under horizontal force were discussed and determined. The stress conditions of the shear wall,frame column,coupling beam and frame beam components under fortification earthquake were clarified using a quantitative way. The results show that the structure can meet the predetermined seismic performance targets.