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Pretest analysis of shake table response of a two-span steel girder bridge incorporating accelerated bridge construction connections
Frontiers of Structural and Civil Engineering ( IF 3 ) Pub Date : 2019-12-28 , DOI: 10.1007/s11709-019-0590-y
Elmira Shoushtari , M. Saiid Saiidi , Ahmad Itani , Mohamed A. Moustafa

This paper presents pretest analysis of a shake table test model of a 0.35-scale, two-span, steel plate girder bridge. The objective of pretest analysis was to obtain an insight on the seismic response of the bridge model during the shake table tests. The bridge included seat type abutments, full-depth precast deck panels, and a two-column bent in which columns were pinned to the footing and integral with superstructure. Six accelerated bridge construction connections were incorporated in the bridge model. An analytical model was developed in OpenSees and was subjected to ten input bi-directional earthquake motions including near-fault and far-field records. The overall seismic response of the bridge was satisfactory for all the earthquake records at 100%, 150%, and 200% design level. All connections and capacity-protected components remained elastic, and the average ductility capacity surpassed the ductility demand even at 200% design level. Using experimental fragility curves developed for RC bridge columns, it was predicted that there was a probability of 45% that columns would undergo the imminent failure in the last run and a probability of 30% for their failure.

中文翻译:

结合加速桥梁施工连接的两跨钢梁桥振动台响应的前测分析

本文介绍了0.35比例尺,两跨,钢板梁桥的振动台试验模型的预测试分析。预测试分析的目的是了解振动台测试期间桥梁模型的地震响应。这座桥包括座椅式基台,全深度的预制甲板面板和一个双柱弯头,柱子固定在柱脚上,并与上层建筑形成一体。六个加速桥梁施工连接纳入了桥梁模型。在OpenSees中开发了一种分析模型,并对其进行了十次输入的双向地震运动,包括近断层和远场记录。对于100%,150%和200%设计水平的所有地震记录,桥梁的整体地震响应均令人满意。所有连接和受容量保护的组件均保持弹性,即使在200%的设计水平下,平均延展性也超过了延性要求。使用为RC桥柱开发的试验性脆性曲线,可以预测,在最后一次运行中,柱遭受即将发生破坏的可能性为45%,而其破坏发生的可能性为30%。
更新日期:2019-12-28
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