独柱墩连续曲线箱梁桥抗倾覆性能评估与加固  

Evaluation and Reinforcement of Anti-overturning Performance of Continuous Curved Box Girder Bridge with Single Column Pier

作　　者：阮云龙 RUAN Yunlong(Highway Maintenance Centerof Sanshui District of Foshan,Foshan Guangdong 528135,China)

机构地区：[1]佛山市三水区公路养护中心,广东佛山528135

出　　处：《广东公路交通》2023年第6期29-34,47,共7页Guangdong Highway Communications

摘　　要：为了提升独柱墩连续曲线箱梁桥的抗倾覆能力,确保重载车辆作用下桥梁结构安全,根据现行桥梁设计规范和行业管理部门的技术要求,分析重载车辆下独柱墩连续曲线箱梁桥倾覆破坏的机理,归纳该类桥梁抗倾覆性能评估的内容、要点和加固方法。结合工程实例中桥梁的空间布置和结构受力特点,提出为独柱墩增设盖梁和支承或将独柱墩改为多柱墩的加固方案,并采用梁单元建立了加固前后独柱墩连续曲线箱梁桥抗倾覆评估模型,对各加固方案下桥梁的抗倾覆性能进行了对比分析。结果表明:将独柱墩改为多柱墩的加固方案,能够更有效地提升桥梁的抗倾覆稳定性,加固后桥梁两侧偏载下的抗倾覆稳定系数为加固前的1.73与1.48倍。In order to improve the anti-overturning ability of continuous curved box girder bridge withsingle-column pier and ensure the safety of bridge structure under the action of heavy-load vehicles.According tocurrent bridge design specifications and technical requirements of the industry management department,the overturning failure mechanism of continuous curved box girder bridge withsingle-column pier under heavy-load vehicles has been studied,the contents,key points and reinforcement methods of the anti-overturning performance evaluation of such bridges have been summed up.Being combined with the spatial layout and structural stress characteristics of the bridge in the engineering example,the reinforcement scheme of adding cover beam and support for single column pier or changing single column pier into multi-column pier has been proposed.The anti-overturning evaluation model of continuous curved box girder bridge with single column pier before and after reinforcement has been established by beam element,and the anti-overturning performance of the bridge under each reinforcement scheme has been compared and analyzed.The results have shown that the reinforcement method of changing single-column pier into multi-columns pier can more effectively improve the anti-overturning stability of the bridge.The anti-overturning stability coefficient of the bridge under eccentric load on both sides after reinforcement is 1.73 and 1.48 times that before reinforcement.The technical analysis method adopted in this paper can provide reference for anti-overturning evaluation and reinforcement of similar bridges.

关 键 词：独柱墩 连续曲线箱梁桥 抗倾覆性能 评估 加固 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]