水平地震作用下底部多层大空间框支剪力墙结构中落地剪力墙合理数量研究

地震作用下，底郭多层大空间框支剪力墙结构中落地剪力墙合理数量的确定是关系到结构的安全和经济合理的关键问题。本文首先采用分区混合法将框支剪力墙结构分成转换层上二部剪力墙结构和转换层下部框架一剪力墙结构两部分。并将前者等效为等截面弯杆，后者等效为等截面弯一剪杆，在此基础上运用振型分解反应谱法计算出结构的地震作用效应，最后结合文献4]中的框支剪力墙结构在水平地震作用下的侧移曲线公式，通过控制楼层层间最大位移与层高之比满足文献5]的规定，推导了水平地震作用下底部多层大空间框支剪力墙结构中落地剪力墙的合理数量计算公式，并给出了方便计算的相关图表。本文方法可用于地震区高层建筑结构的初步设计。

Optimal Quantity of Shear Wall Linked with the Ground in Shear Wall Structure Supported on Frame under Earthquake Actions

It is important to make certain the optimal quantity of shear wall linked with the ground in shear wall structure supported on frame under earthquake actions in civil engineering. In this paper, based on the zonal mixed method, the whole structure can be divided into shear wall structure above transfer story and frame-shear wall structure tinder transfer story, two parts firstly, the former is equivalent to a symmetrical bend bar and the latter is equivalent to a symmetrical bend-shear bar, then earthquake actions effect of the whole structure can be calculated by modal analysis method on the base of that. At the last, the formulas about the optimal quantity of shear wall linked with the ground under earthquake actions are deduced depend on controlling the maximum ratio of sideway to height of the bottom floor to satisfy literature5] with the distortion of shear wall structure supported on frame under earthquake actions, which is provided by literature4], some graphs for calctdate are given too. This method is proved that it is accurate and convenient enough for use when tall buildings are designed in earthquake zone during the preliminary design.