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首页> 外文期刊>Advances in Structural Engineering >Experimental Studies on Seismic Performance of Subsidiary Piers for Long Span Cable-Stayed Bridge with Energy Dissipation
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Experimental Studies on Seismic Performance of Subsidiary Piers for Long Span Cable-Stayed Bridge with Energy Dissipation

机译：大跨度耗能斜拉桥副墩抗震性能试验研究。

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This paper studied a damage-controlled RC bridge pier, which is a sacrificial subsidiary pier, 60 m in height, of a trial designed cable-stayed bridge with a main span of 1400 m. The previous studies have demonstrated that the bridge towers would have tow-hinge type failure, namely plastic hinges occurred both at the tower bottom section and around the cables anchorage section on the upper part of tower, when suffered from strong earthquakes in the longitudinal direction of the bridge. The simulations have illustrated that the damage of bridge towers can be reduced to an acceptable level if the subsidiary piers can be redesigned as energy dissipation structural components. In this study, three 1/10 scale subsidiary pier models, which are one single RC column and two twin RC columns connected by energy dissipation elements, were tested under cyclic quasi-static loads. The energy dissipation members adopted in the subsidiary piers are shear links (SLs) and buckling restrained braces (BRBs). From the experiments, it is found that: 1) Compared to the single column model, the energy dissipation capacity of the twin-column models with energy dissipation members, SLs or BRBs, can be improved significantly. In this study, the deformation capacity of the twin-column model with SLs is better than that with BRBs, indicating that the twin-column pier connected by SLs has the largest energy dissipation capacity among all tested models. 2) The twin-column piers suffer from less damage than the single column pier does due to the helps of energy dissipation members. The energy dissipation capacity of the twin-column piers tested can satisfy the seismic demand of the long span cable-stayed bridge investigated under strong earthquakes.
机译：本文研究了一个损坏控制的RC桥墩，该桥墩是试验性设计的主跨1400 m的斜拉桥，高60 m，是牺牲性的副墩。先前的研究表明，桥梁塔可能会发生拖链式破坏，即当塔身纵向遭受强烈地震时，在塔底部和塔上部电缆锚固段周围会发生塑料铰链。桥。仿真表明，如果可以将副墩重新设计为耗能结构部件，则可以将桥塔的损坏降低到可接受的水平。在这项研究中，在循环准静态载荷下测试了三个1/10比例的辅助墩模型，分别是一个单根RC柱和两根通过耗能元件连接的双RC柱。副墩采用的消能构件是剪力连接（SL）和防屈曲支撑（BRB）。从实验中发现：1）与单列模型相比，具有耗能构件SL或BRB的双柱模型的耗能能力得到了显着提高。在这项研究中，SL的双柱模型的变形能力比BRB更好，表明在所有测试模型中，SL相连的双柱墩具有最大的耗能能力。 2）由于耗能构件的帮助，双柱墩的损坏比单柱墩的损坏小。所测试的双柱墩的消能能力可以满足大地震作用下大跨度斜拉桥的抗震要求。

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