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针对考虑轴向力效应的弯剪型高层框架结构的弹塑性地震响应问题,研究转动惯性对高层框架结构层间剪力以及楼层屈服程度的影响。该文给出了考虑转动惯性的高层框架结构弹塑性分析的数值计算方法。对比了考虑和不考虑转动惯性时框架结构各层间剪力的最大值。针对不同塑性刚度系数情况,研究了考虑和不考虑转动惯性对楼层屈服的影响。通过是否考虑刚度系数中的轴向力,研究轴向力对结构层间剪力的影响。分析了竖向地震的作用力及楼层柱子的拉压状态。数值计算结果表明:转动惯性可造成高层框架结构底部楼层的层间剪力增大;竖向地震作用和结构自重对结构由水平地震作用产生的层间剪力影响很小;高层框架结构在强竖向地震作用下,其顶部附近楼层的柱子可出现受拉状态。
In view of the elasto-plastic seismic response of the frame-shear high-rise frame structure considering the axial force effect, the influence of rotational inertia on the interlaminar shear force and the yield of the floor is studied. In this paper, a numerical method for elastoplastic analysis of high-rise frame structures with rotational inertia is given. The maximum value of shear force between frames in frame structure is compared with and without consideration of moment of inertia. According to different plastic stiffness coefficient, the influence of rotational inertia on floor yielding is considered. The influence of axial force on the interlaminar shear force is studied by considering the axial force in the stiffness coefficient. The vertical seismic forces and the tension of the floor pillars are analyzed. The numerical results show that the rotational inertia can cause the increase of the inter-story shear force at the bottom of the high-rise frame structure. The vertical seismic action and the self-weight of the structure have little influence on the inter-story shear force caused by the horizontal seismic action. Vertical seismic action, the top of the pillars near the top floor may appear tension state.