Now the earthquake-proof checking calculation methods we used include equivalent base shear method, mode analysis method and time-history method.
目前进行结构抗震验算的方法有：底部剪力法，振型分解反应谱法和时程分析法。
In this paper, the method of extremum of the product function is used to analyze upper bound seismic base shear force of the existing overpass and the calculation formulas are gotten.
本文利用积函数极值法，从地震作用的角度出发，推导并建立了已建立交桥桥墩的基底剪力的表达式。
On the base of engineering application, the select principle of method of rock discontinuity shear strength is discussed.
从工程实际出发，讨论了岩体结构面直剪试验方法的选取原则。
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