基于場(chǎng)地特征周期的最小地震剪力系數(shù)研究
發(fā)布時(shí)間:2018-08-18 14:56
【摘要】:樓層最小地震剪力系數(shù)是建筑抗震設(shè)計(jì)中的重要控制指標(biāo)之一。對(duì)現(xiàn)行規(guī)范規(guī)定的最小地震剪力系數(shù)限值與場(chǎng)地特征周期無(wú)關(guān)的不合理性進(jìn)行了分析,這也是導(dǎo)致Ⅰ、Ⅱ類場(chǎng)地上的長(zhǎng)周期結(jié)構(gòu)基底剪力系數(shù)難以滿足規(guī)范限值的主要原因。分析了影響基底剪力系數(shù)的因素,發(fā)現(xiàn)基底剪力系數(shù)受到結(jié)構(gòu)質(zhì)量和剛度的分布、地震烈度、場(chǎng)地特征周期、結(jié)構(gòu)阻尼比以及設(shè)計(jì)反應(yīng)譜形狀的影響。提出了基于場(chǎng)地特征周期的最小地震剪力系數(shù)限值,在場(chǎng)地條件較好時(shí)可放松規(guī)范限值,這樣使長(zhǎng)周期結(jié)構(gòu)的抗震設(shè)計(jì)更容易滿足地震剪力系數(shù)的要求,更為經(jīng)濟(jì)合理。通過(guò)一個(gè)算例驗(yàn)證了文中提出的基于場(chǎng)地特征周期的最小地震剪力系數(shù)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,
本文編號(hào):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,
本文編號(hào):2189822
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