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本文采用理论方法,导出了具有一个高差的任意多跨排架及中间升高的任意多跨对称排架高低跨交接柱各截面的高振型影响系数的精确计算公式,并对中间升高的不对称多跨排架提出了计算高振型影响系数的近似方法的建议.采用本文的计算公式计算不等高排架的地震内力,比直接按振型分解法求解的计算工作量大大减少,而又比各种经验公式更为精确可靠.本文所提出的公式可供修订抗震设计规范时参考及实际工作中采用.
In this paper, we use the theoretical method to derive the precise calculation formula of the high-order mode influence coefficient for each section of an arbitrary multi-bay with one height difference and any multi-span symmetrically-arranged middle-high cross-junction column in the middle, and to raise the middle elevation. The asymmetry multi-span system proposed an approximate method for calculating the impact coefficient of the high mode shape. The calculation of the seismic internal force of the unequal height girder using the calculation formula of this paper is much less than the calculation workload solved by the direct mode decomposition method. , And more accurate and reliable than the various empirical formulas. The formula proposed in this paper can be used to modify the seismic design specification reference and practical work.