| 基于损伤分析的旧曲线梁桥抗震性能评估 |
| |
| 引用本文： | 亓兴军,张荣凤,常敬宇,王珊珊,丁晓岩.基于损伤分析的旧曲线梁桥抗震性能评估[J].西北地震学报,2021,43(3):636-643. |
| |
| 作者姓名： | 亓兴军 张荣凤 常敬宇 王珊珊 丁晓岩 |
| |
| 作者单位： | 山东建筑大学 交通工程学院, 山东 济南 250101;山东高速集团有限公司, 山东 济南 250098 |
| |
| 基金项目： | 山东省交通运输厅科技计划项目（2020B69）；山东省高等学校土木结构防灾减灾协同创新中心项目（XTM201904） |
| |
| 摘 要： | 曲线桥梁在役期间可能面临地震灾害,导致结构损坏甚至坍塌,为了评估在役桥梁的抗震性能,提出基于损伤分析的曲线梁桥抗震性能评估方法。建立旧曲线梁桥有限元模型,基于损伤分析的原理,提出适合曲线梁桥地震响应特性的构件损伤模型,在全桥有限元模型中输入不同类型地震动,计算各构件的损伤指数,并结合旧桥检算系数,由各构件损伤指数综合得到桥梁的整体损伤指数。结果表明:不同地震动下主梁会发生碰撞破坏,桥梁两端的支座容易发生移位,桥墩沿横桥向或顺桥向均会产生位移;不同地震动对主梁、支座、桥墩等构件造成的损害程度有较大差异,各构件的地震响应会影响桥梁整体结构的抗震性能,其中桥墩对桥梁整体抗震性能的影响最大,桥墩位移超过极限值可能导致倒塌;主梁反复碰撞会加剧桥梁的破坏程度,桥梁两端支座在地震作用下更容易发生损坏。
|
| 关 键 词： | 损伤指数 损伤状态 抗震性能 旧曲线梁桥 |
| 收稿时间： | 2019/10/9 0:00:00 |
Seismic Performance Evaluation of Old Curved Bridges Based on Damage Analysis |
| |
| QI Xingjun,ZHANG Rongfeng,CHANG Jingyu,WANG Shanshan,DING Xiaoyan.Seismic Performance Evaluation of Old Curved Bridges Based on Damage Analysis[J].Northwestern Seismological Journal,2021,43(3):636-643. |
| |
| Authors: | QI Xingjun ZHANG Rongfeng CHANG Jingyu WANG Shanshan DING Xiaoyan |
| |
| Institution: | School of Transportation Engineering, Shandong Jianzhu University, Ji''nan 250101, Shandong, China;Shandong Hi-Speed Group Co., Ltd., Ji''nan 250098, Shandong, China |
| |
| Abstract: | Curved bridges may bear earthquake disasters during service, resulting in structural damage or even collapse. To evaluate the seismic performance of existing bridges, a seismic performance evaluation method of curved girder bridges based on damage analysis was proposed in this paper. The finite element model of an old curved girder bridge was established, then based on the principle of damage analysis, the component damage model which can describe the seismic response characteristics of curved girder bridge was proposed. The damage indexes of each component of the bridge were calculated by inputting different ground motions into the finite element model. Combined with the checking coefficient of the old bridge, the whole damage index of the bridge was inferred from the damage index of each component. The results showed that: (1) Under different ground motions, the main girder will cause impact damage, the bearings at both ends of the bridge are prone to shift, and the piers will cause displacements both along the transverse and longitudinal direction of the bridge. (2) The damage degree of main girder, bearing, bridge pier, and other components caused by different ground motions is quite different; the seismic response of each component will affect the seismic performance of whole bridge, among which, the pier has the greatest impact, and the pier displacement exceeding the limit value may lead to collapse; (3) Repeated collision of the main girder will aggravate the damage degree of bridge, and the bearings at both ends of the bridge are more likely to be damaged under earthquake. |
| |
| Keywords: | damage index damage state seismic performance old curved bridge |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《西北地震学报》浏览原始摘要信息 |
| 点击此处可从《西北地震学报》下载免费的PDF全文 |
|
