曲线桥RC圆形桥墩在弯扭耦合作用下的抗震性能研究

发布时间：2018-05-23 16:25

本文选题：小半径 + 曲线桥梁　；参考：《公路交通科技(应用技术版)》2016年12期

【摘要】：曲线桥梁以其线型优美、适应复杂地形要求等诸多优点,备受设计者青睐。由于其几何线型的不规则性,在地震作用下墩柱处于压-弯-剪-扭耦合的复杂受力状态,而现阶段国内外抗震规范中仅以直线桥作为参考对曲线桥梁的墩柱进行抗震设计,不能完全反映耦合受力特点,因而造成桥梁抗震性能不能准确评估。为解决这一问题,本文以小半径曲线匝道桥钢筋混凝土圆形墩柱为研究对象(曲率半径小于90m、桥面宽6~10m、桥墩剪跨比大于4),针对地震作用下墩柱弯扭耦合引起的弯曲破坏问题,设计了2根试验墩柱,并采用拟静力试验对其抗震性能进行了研究。
[Abstract]:Curved bridges are favored by designers for their many advantages, such as graceful alignment and adaptability to complex terrain. Due to the irregularity of geometric alignment, the pier column is subjected to the complex force state of compression-bending, shear and torsional coupling under seismic action. At present, the linear bridge is used as the reference to the seismic design of the pier column of the curved bridge in the domestic and foreign seismic code. The seismic performance of the bridge can not be accurately evaluated because of the failure to reflect the coupling force characteristics. In order to solve this problem, the reinforced concrete circular pier column of small radius curve ramp bridge (curvature radius < 90 m, bridge deck width 6 ~ 10 m, pier shear span ratio greater than 4 m) is studied in this paper. In view of the bending failure problem caused by the coupling of pier and column bending and torsion under earthquake, this paper takes the reinforced concrete circular pier column of small radius curve ramp bridge as the research object. Two test piers were designed and their seismic behavior was studied by pseudo static test.
【作者单位】：北京建筑大学北京市城市交通基础设施建设工程技术研究中心;北京建筑大学首都世界城市顺畅交通协同创新中心;同济大学土木工程防灾国家重点实验室;北京新奥通城房地产开发有限公司;
【基金】：建设部研究开发项目(项目编号:2010-k3-47) 国家青年自然科学基金(51308027) 北京市教委科技计划面上项目(KM201310016007) 北京市属高等学校创新团队建设与教师职业发展计划项目(IDHT20130512) 土木工程防灾国家重点实验室开放基金资助(SLDRCE-14-02) 北京市自然科学基金面上项目(8162012)
【分类号】：U442.55

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