扭转效应对带地下室高层结构底部嵌固的影响

摘要

高层结构在地下室顶板嵌固的条件,规范从层间侧向刚度比做出规定,并辅以构造措施.而结构扭转效应发生后,这个嵌固假定虽在侧刚比满足规范要求,但计算结果仍存在较大误差.参考规范和已有研究结果,从结构侧向刚度、周期和位移入手,通过建立模型的方式分析扭转对地下室嵌固的影响.最后给出刚度比计算的建议和在扭转效应下侧向刚度比应更为严格并同时要求扭转刚度比满足一定限值的结论.%Domestic codes allowed high-rise buildings fixed on bottom in limiting lateral stiffness ratio and additional tectonic measures. However there was still error in torsion effect even when the stiffness ratio met the codes. The influence of torsion effect in bottom fixed by structural modeling according stiffness ratio, period and deflection would be analyzed. In the end suggesting the calculation of stiffness ratio, asking for a higher limit of lateral stiffness ratio and adding request of torsional stiffness ratio in torsion effect.