Factually there is no assurance for ductility in this coefficient. Furthermore, the seismic force is comparatively lower in design than in fact. Both of them necessarily increase the seismic risk.
实际规范中并没有延性构造保证，加之我国当前设计地震作用相对偏低，更增加了地震破坏的危险性。
Some results are indicated that horizontal and vertical seismic force must simultaneously be considered in the seismic study and design of the prestressed-arch structures.
结果表明，在预应力拱架结构的抗震研究中，需同时考虑水平和竖向地震作用。
The method of direct displacement-based seismic design is an important improvement on force-based seismic design.
直接基于位移的抗震设计方法是对基于力的抗震设计方法的重大改进。
The seismic design methods of bridges in the permafrost region are studied firstly. The wave method and the inertial force method are compared.
首先研究了冻土区桥梁的抗震计算方法，对波动法和惯性力法的计算结果进行了对比分析。
The numerical results reveal that a great horizontal force acting on the aqueduct body may occurred during strong earthquake. This action must be considered in seismic resistance design.
计算表明：强震时，流体对槽身可能会产生很大的横向水平力，建议在抗震设计时考虑这一作用因素。
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。
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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