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首页> 外文会议>Asia-Pacific Conference on Shock amp; Impact Loads on Structures; 20031112-14; Changsha, Hunan,(CN) >FUNDAMENTAL CONSIDERATIONS ON THE EFFECTS OF SHOCK ABSORBERS ATTACHED TO THE END OF BRIDGE GIRDERS
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FUNDAMENTAL CONSIDERATIONS ON THE EFFECTS OF SHOCK ABSORBERS ATTACHED TO THE END OF BRIDGE GIRDERS

机译：桥梁梁末端安装减震器的基本注意事项

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摘要

In base-isolated bridges, it is well known that seismic forces can be reduced to reasonable amounts. On the contrary, response displacements of bridge girders become large in comparison with the conventional viaducts without base isolation systems. Therefore, the possibility of pounding between adjacent bridge girders should be considered in these cases. Shock absorbers between bridge girders are expected to mitigate pounding effects. Attention should be paid to the shock absorbers including bridge restrainer systems in the design of viaducts. In this study, a two-dimensional simple viaduct model in which various kinds of shock absorbers were attached between the end of bridge girders and abutments were used as an analysis model. Dynamic responses were calculated by carrying out a nonlinear time-history response analysis, and the effects of shock absorbers between bridge girders and abutments under earthquake were discussed in detail. It was found that, by using proper shock absorbers at the end of bridge girders, seismic forces are transferred to adjacent bridge piers by means of the continuation of bridge girders. The seismic forces were transferred almost equally to each bridge pier. Furthermore, an analysis model with a gap between the shock absorber and the abutment was examined, and the effects of the gap on the dynamic response of bridge girders and bridge piers were investigated. As a result, it was found that the gap between a shock absorber and an abutment has no effect on the transfer mechanism of seismic forces to adjacent bridge piers.
机译：在基础隔离的桥梁中，众所周知，可以将地震力减小到合理的水平。相反，与没有基础隔离系统的传统高架桥相比，桥梁的响应位移变大。因此，在这种情况下，应考虑在相邻的桥梁大梁之间碰撞的可能性。桥梁大梁之间的减震器有望减轻冲击力。高架桥设计中应注意减震器，包括桥梁约束系统。在这项研究中，使用二维简单高架桥模型作为分析模型，在该模型中，将各种减震器连接在桥梁的末端和桥台之间。通过进行非线性时程响应分析来计算动力响应，并详细讨论了地震作用下桥梁大梁与桥台之间减震器的作用。已经发现，通过在桥梁的末端使用适当的减震器，地震力通过桥梁的连续传递到相邻的桥墩。地震力几乎均等地传递到每个桥墩。此外，研究了一种在减震器和桥台之间留有间隙的分析模型，并研究了该间隙对桥梁大梁和桥墩动力响应的影响。结果，发现减震器和桥台之间的间隙对地震力向相邻桥墩的传递机制没有影响。

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