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首页> 外文期刊>Journal of structural engineering >Numerical Studies on the Seismic Performances of RC Two-Column Bent Bridges with Self-Centering Energy Dissipation Braces
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Numerical Studies on the Seismic Performances of RC Two-Column Bent Bridges with Self-Centering Energy Dissipation Braces

机译：具有自定心耗能支撑的钢筋混凝土两列弯桥抗震性能的数值研究

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摘要

Bridges may suffer large residual displacements after strong earthquakes. These large residual displacements may increase the reinforcement cost and even lead to the collapse of the bridge. Various self-centering energy dissipation braces (SCEBs) have been proposed to be installed to the frames to reduce the adverse residual displacement, and extensive numerical and experimental investigations have been performed to examine the effectiveness of these devices. However, previous studies mainly focused on the application of the SCEB to the steel frames. Very limited studies investigated the seismic performances of a reinforced concrete (RC) bridge supported by the two-column bents with SCEBs. This paper presents numerical studies on the seismic performances of an RC two-column bent bridge equipped with SCEBs. The hysteretic behavior of the RC two-column bent with an SCEB is firstly modeled and validated by the experimental data. The bent with the SCEB model is then applied to a whole bridge to calculate seismic responses of the bridge. The influences of the key parameters of the SCEB on the seismic responses of the bridge are systematically investigated through parametric studies. This study can provide an insightful basis for the design of RC two-column bent bridges with SCEBs to achieve a desirable seismic performance. (C) 2020 American Society of Civil Engineers.
机译：强烈地震后，桥梁可能会遭受较大的残余位移。这些较大的残余位移可能会增加加固成本，甚至导致桥梁坍塌。已提出将各种自定心耗能支撑（SCEB）安装到框架上以减少不利的残余位移，并且已经进行了广泛的数值和实验研究以检验这些装置的有效性。但是，以前的研究主要集中在SCEB在钢框架上的应用。非常有限的研究调查了带有SCEB的两列弯支撑的钢筋混凝土（RC）桥梁的抗震性能。本文对装有SCEB的钢筋混凝土两柱弯桥的抗震性能进行了数值研究。首先对带有SCEB的RC两柱弯曲的滞后行为进行了建模，并通过实验数据进行了验证。然后将带有SCEB模型的弯曲应用于整个桥梁，以计算桥梁的地震响应。通过参数研究系统地研究了SCEB关键参数对桥梁地震响应的影响。这项研究可以为具有SCEB的RC两柱弯桥的设计提供深刻的基础，以达到理想的抗震性能。 （C）2020年美国土木工程师学会。

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