| 地震作用下曲线梁桥结构响应及敏感性分析 |
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| 引用本文： | 游新,何睿华,吴刚,宋帅.地震作用下曲线梁桥结构响应及敏感性分析[J].世界地震工程,2020,0(1):118-124. |
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| 作者姓名： | 游新 何睿华 吴刚 宋帅 |
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| 作者单位： | 青海省交通规划设计研究院有限公司,青海西宁810000;青海交通职业技术学院,青海 西宁810000;华东交通大学 土木建筑学院,江西 南昌330013;太原理工大学 建筑与土木工程学院,山西 太原030024 |
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| 基金项目： | 国家基金项目(51808376);江西省青年科学基金项目(20192BAB216032) |
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| 摘 要： | 为研究不同设计参数对曲线梁桥地震响应的影响以指导结构抗震设计，对不同支承约束曲线梁桥地震响应及地震需求敏感性进行分析。采用增量动力分析（IDA）方法对比分析了不同支承约束曲线梁桥的结构地震响应变化趋势；采用Tornado图形法对不同结构参数影响程度进行了排序，找出了对结构地震需求影响显著的参数。结果表明:采用板式橡胶支座桥梁因支座易发生滑移而导致上部结构位移较大，但降低了下部结构响应，设置固定墩后，下部结构损伤显著增加；对于采用板式橡胶支座和铅芯橡胶支座的曲线梁桥，墩高及跨径对墩底曲率需求影响较大，而对于固定墩为墩梁固结形式和采用盆式橡胶支座的曲线梁桥，跨径及跨数对墩底曲率需求影响较大；对于采用不同支承约束的曲线梁桥，墩高和曲率半径对桥台位移需求影响较大，仅次于地震动参数PGA。
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| 关 键 词： | 桥梁工程 敏感性分析 Tornado图形法 地震响应分析 支承约束 |
Response analysis and sensitivity analysis of curved bridge under seismic actions |
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| YOU Xin,HE Ruihua,WU Gang,SONG Shuai.Response analysis and sensitivity analysis of curved bridge under seismic actions[J].World Information On Earthquake Engineering,2020,0(1):118-124. |
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| Authors: | YOU Xin HE Ruihua WU Gang SONG Shuai |
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| Affiliation: | 1. Qinghai Transportation Planning Design and Research Institute Co. LTD;2. Qinghai Communication Technical College, Xi’ning 810000, China;3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China;4. College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
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| Abstract: | In order to study the influences of different design parameters on the seismic response of curved bridges,which can guide the seismic design of the bridges,the seismic response and seismic demand sensitivity of curved bridges with different supporting restraints are analyzed.The incremental dynamic analysis(IDA)method is used to analyze the variation trend of structural seismic response of curved bridges with different supporting restraints.Using Tornado graph method,the extent of structural parameters impact is sorted and the parameters having significant impacts on the seismic demand of the structure are found out.The results show that the bridge with laminated elastomeric bearings has a large displacement of the super structure due to the sliding of the bearing,but the response of the substructure reduces.After installation of fixed piers,the damage of the substructure increases significantly.The pier height and the span length have a major impact on the curvature demand at the bottom of piers for curved bridges under the supporting of laminated rubber bearings and lead rubber bearings.The span length and the number of spans have a major impact on the curvature demand at the bottom of piers for curved bridges of which fixed piers using pier girder consolidation or basin type rubber bearings.The pier height and the curvature radius have a major impact on the abutment displacement demand for curved bridges under different supporting constraints,which just smaller than that of the ground motion parameter PGA. |
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| Keywords: | bridge engineering sensitivity analysis Tornado graph method seismic response analysis supporting constraints |
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