This paper presented an accurate method of calculating the earthquake force design sensitivity and Hessian matrix of the planar frame.

提出一种平面框架结构地震力的设计敏度和海森矩阵的精确计算方法。

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Finally, earthquake force based on maximum site acceleration and response spectrum to different design criterion for different type of site was determined.

最后，根据反应的结果提出不同类型场地的各设防水准的地震影响系数。

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Higher anti-seismic grade leads bigger adjustment coefficient of internal force, which makes design values of internal force under small earthquake be even more than those under medium earthquake.

较高抗震等级结构的内力调整系数较大，导致小震弹性设计内力放大较多，甚至超过中震的内力设计值。

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