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基本周期是决定框架地震荷载大小的主要参数。当前,纯框架结构主要采用顶点位移法或能量法公式计算基本周期;该二法虽优点较多,但计算工作仍嫌繁琐,不便工程实用。本文按等层假定提出一简化计算公式,效率可提高2～3倍,误差控制在3%以内。
The basic period is the main parameter that determines the magnitude of the seismic load in the frame. At present, the pure frame structure mainly uses the vertex displacement method or the energy method formula to calculate the basic period. Although the two methods have more advantages, the computational work is still too cumbersome and inconvenient for engineering application. This paper presents a simplified calculation formula based on the assumption of the same layer, the efficiency can be increased by 2 to 3 times and the error control within 3%.