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引言鉴于很难对强烈地震作用下基础的破坏进行检查和修理,因此桥梁桩基的设计原则是保证其处于弹性范围内。但是使整体桥梁结构处于弹性反应的设计是不经济的,因而通常的方法是由桥墩产生的塑性铰提供延性,或者在该方法不能实现时,采用某种机械能耗散装置。然而,在某些情况下,避免在桥墩中出现非弹性变形在经济上是不可取的,同时也不一定是最好的解决方法。例如,小的单跨桥通常不能采用机械能耗散器来得到保护,而且除了桩中的塑性铰外也没有
Introduction It is difficult to inspect and repair the damage caused by strong earthquakes. Therefore, the design principle of the bridge pile foundation is to ensure that it is within the elastic range. However, it is not economical to design the overall bridge structure to be elastically reactive. Therefore, the usual method is to provide ductility by the plastic hinges produced by the piers, or to use certain mechanical energy dissipation devices when this method cannot be realized. However, in some cases, avoiding inelastic deformation in the pier is not economically desirable and is not necessarily the best solution. For example, small single-span bridges usually cannot be protected by mechanical energy dispersers, and they do not have plastic hinges in the piles.