肋拱桥关键截面箱型转换加固技术试验研究  

Reinforcement Technology of Transforming Rectangular Rib Arch Bridge into Box Rib Arch Bridge

作　　者：石飞 周建庭[2] 莫喜晶[2] 祝小龙[3] 武电坤[2] 

机构地区：[1]重庆交通建设集团有限责任公司,重庆401147 [2]重庆交通大学,重庆400074 [3]重庆市勘测院,重庆400020

出　　处：《重庆交通大学学报（自然科学版）》2009年第4期664-667,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：重庆市杰出青年项目(CSTC,2008BA6038);交通部西部交通建设科技项目(200631822349)

摘　　要：以重庆丰都庙包大桥为原型,制作了2片钢筋混凝土肋拱模型,首先采用"肋拱桥关键截面箱型转换加固技术"对其中1片进行加固处治,然后对加固前、后肋拱模型实施全过程破坏试验。通过对比分析加固前、后肋拱模型的应变、挠度、横向分布比率、裂缝及破坏模式等指标,得到以下结论:肋拱桥关键截面箱型转换加固后,新增设的钢筋混凝土箱型封闭层能与原肋拱协调变形、共同承担活载。Taking Chongqing Fengdu Miaobao Bridge as the antitype, two reinforced concrete rib arch models are established. The reinforcement technology of transforming rectangular rib arch bridge into box rib arch bridge is applied to reinforce one of the models, and then destructive tests are carried out on the pre-reinforced model and post-reinforced model. Through the com- parison analysis on the conditions of the strain, deflection, lateral load distribution ratio, crack, failure mode and other indicators before and after the hreinforcement, the conclusion is drawn that the new reinforced concrete box can coordinate with the deformation with the original rib and have a common commitment to the live load.

关 键 词：加固 肋拱桥 截面转换 承载力 试验 

分 类 号：U444.7[建筑科学—桥梁与隧道工程]