龙河特大桥墩梁结合部模型试验设计  

Model Design of the Pier-beam Joint in the Longhe Super Large Bridge

作　　者：汪存书 郑和晖[2,3] 陈富强[2,3] 刘占国[2,3] 

机构地区：[1]中交二航局第二工程有限公司,重庆401121 [2]公路长大桥梁建设国家工程研究中心,北京100088 [3]长大桥梁建设施工交通行业重点实验室,武汉430040

出　　处：《结构工程师》2013年第5期119-125,共7页Structural Engineers

摘　　要：龙河特大桥为大跨超高空心薄壁柔性墩连续刚构桥,为深入探究大桥墩梁结合部力学行为特点,对墩梁结合部开展1:6缩尺模型试验。针对结构及受力特点,对模型尺寸、预应力、配重、普通钢筋、加载和测试方案等进行设计。试验按照实桥实际工况进行加载,同时对墩梁结合部进行实体有限元分析。试验结果表明,龙河大桥试验模型设计合理、试验加载方法可行,并且试验结果能较好反映实桥墩梁结合部受力特点规律。介绍的模型试验设计与试验加载方法对同类结构模型试验具有借鉴作用。This paper presents model design and loading test of the pier-beam joint in the Longhe Bridge,which is a long-span and high-pier continuous rigid-frame bridge with ultra-high hollow thin-walled flexible piers.In the model test,the model size,prestressing tendon,counterweight,reinforcement,loading and test scheme were designed according to the actual structure and its mechanical characteristics.Along with numerical analysis,the loading test was carried out on the basis of actual condition simulation of the real bridge.Experimental results show that the design model and the loading scheme is reasonable.The test results can reflect the status of the real bridge in the real world.

关 键 词：龙河大桥 连续刚构桥 墩梁结合部 相似理论 试验设计 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]