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以振型分解反应谱法为理论基础,改进了考虑高阶振型的Pushover算法水平侧向力分布增量系数。通过算例,与以往的侧向力均匀分布、倒三角分布进行了推覆曲线、层间位移角和层间剪力分析对比,发现均匀分布偏差最大,倒三角分布较小,而改进后的分布偏差最小,证明了改进后的侧向力分布能更好地进行框架结构抗震性能静力分析,且具有较高的精度。
Based on the modal decomposition response spectrum method, the horizontal lateral force distribution increment coefficient of pushover algorithm considering high modes is improved. Comparing with the past distribution of the lateral force and the inverted triangular distribution, the comparison of the nappe curve, the displacement angle between layers and the analysis of the interlaminar shear force shows that the distribution deviation is the largest and the distribution of the inverted triangle is small, while the improved It is proved that the improved lateral force distribution can better perform the static analysis of the seismic performance of the frame structure and has higher accuracy.