Analytical Assessment of the Effect of Vertical Earthquake Motion on RC Bridge Piers
Analytical Assessment of the Effect of Vertical Earthquake Motion on RC Bridge Piers
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DOI：
10.1061/(asce)st.1943-541x.0000306
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
S. J. Kim;C. Holub;A. Elnashai
中科院分区：
文献类型：
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作者：
S. J. Kim;C. Holub;A. Elnashai
本文介绍了垂直地震地面运动对钢筋混凝土桥墩影响的分析评估。对北岭地震期间受损的桥梁结构和联邦公路概念桥梁设计进行了检查。给出了一组具有不同垂直与水平峰值加速度比的地震地面运动记录对两座桥梁的影响，并将结果与仅水平激励的情况进行了比较。还报告了水平和垂直加速度峰值之间的到达时间间隔的影响，并与重合运动的情况进行了比较。据观察，包含地震动的垂直分量对所有水平和分量的响应都有重要影响。因此得出的结论是，垂直运动应纳入评估和设计分析中，特别是不存在阻碍其纳入的特殊挑战。
This paper presents analytical assessment of the effect of vertical earthquake ground motion on RC bridge piers. A bridge structure damaged during the Northridge Earthquake and a Federal Highway concept bridge design are examined. The effects of a suite of earthquake ground motion records with different vertical-to-horizontal peak acceleration ratios on the two bridges are presented and the results are compared with the case of horizontal-only excitation. The effects of arrival time interval between horizontal and vertical acceleration peaks are also reported and compared to the case of coincident motion. It is observed that the inclusion of the vertical component of ground motion has an important effect on the response at all levels and components. It is therefore concluded that vertical motion should be included in analysis for assessment and design, especially that there are no particular challenges impeding its inclusion.