基于场地特征周期的最小地震剪力系数研究
发布时间:2018-08-18 14:56
【摘要】:楼层最小地震剪力系数是建筑抗震设计中的重要控制指标之一。对现行规范规定的最小地震剪力系数限值与场地特征周期无关的不合理性进行了分析,这也是导致Ⅰ、Ⅱ类场地上的长周期结构基底剪力系数难以满足规范限值的主要原因。分析了影响基底剪力系数的因素,发现基底剪力系数受到结构质量和刚度的分布、地震烈度、场地特征周期、结构阻尼比以及设计反应谱形状的影响。提出了基于场地特征周期的最小地震剪力系数限值,在场地条件较好时可放松规范限值,这样使长周期结构的抗震设计更容易满足地震剪力系数的要求,更为经济合理。通过一个算例验证了文中提出的基于场地特征周期的最小地震剪力系数限值的合理性。
[Abstract]:The minimum seismic shear coefficient is one of the important control indexes in seismic design of buildings. The irrationality of the limit value of the minimum seismic shear coefficient, which is not related to the period of the site characteristic, is analyzed, which is the main reason why the base shear coefficient of the long-period structure on class 鈪,
本文编号:2189822
[Abstract]:The minimum seismic shear coefficient is one of the important control indexes in seismic design of buildings. The irrationality of the limit value of the minimum seismic shear coefficient, which is not related to the period of the site characteristic, is analyzed, which is the main reason why the base shear coefficient of the long-period structure on class 鈪,
本文编号:2189822
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