中文摘要：

提出了具有分层耗能机制的斜拉桥损伤控制策略,即通过辅助墩消耗地震输入能和分担主梁惯性力来保护主塔,再通过附加在墩柱间的耗能构件来保护辅助墩。首先结合中国现行公路桥梁抗震设计规范,定义了斜拉桥构件的损伤性能指标以及各级抗震设防水准下的损伤控制目标;然后建立了具有分层耗能机制的斜拉桥顺桥向地震损伤控制方法;最后通过以一座主跨1 400m斜拉桥的试设计算例验证了该控制方法的可行性和有效性。结果表明：附加在墩柱间的耗能构件既可有效控制辅助墩的地震损伤,又可改善辅助墩对主塔的控制效果,使各构件满足各级抗震设防水准下的损伤控制目标。

英文摘要：

In this paper,the novel damage control strategies with layer dissipation mechanism are proposed,the core of which is to share more the girder inertia force and to dissipate more earthquake input energy and to limit the seismic damage of tower by a novel subsidiary pier with energy dissipation elements.The damage performance indices of different elements of cable-stayed bridge are defined and damage control objectives are established under different seismic fortification levels according to guidelines for seismic design of highway bridge in China.Then the seismic damage control method of cable-stayed bridge is presented in longitudinal direction according to the proposed novel control strategies.Finally,the trial design example of a cable-stayed bridge with a central span of 1,400 mshows that the presented damage control method is feasible and effective in this study.The simulation results show that the proposed damage control strategies,employing the novel subsidiary piers with energy dissipation elements,is effective;the damage control objectives of all elements can be satisfied under different seismic fortification levels.