损伤情况下装配式T梁桥的横向力学性能研究  

Research on the transverse mechanical properties of prefabri⁃cated T⁃beam bridges under damage conditions

作　　者：童浩[1] 王振辉 朱森林 李丹 TONG Hao;WANG Zhenhui;ZHU Senlin;LI Dan(Jiangsu Expressway Company Limited,Nanjing 210034,China;School of Civil Engineering,Southeast University,Nanjing 211189,China;China Design Testing Technology Company Limited,Nanjing 211135,China)

机构地区：[1]江苏宁沪高速公路股份有限公司,江苏南京210034 [2]东南大学土木工程学院,江苏南京211189 [3]华设检测科技有限公司,江苏南京211135

出　　处：《现代交通与冶金材料》2024年第4期87-94,共8页Modern Transportation and Metallurgical Materials

基　　金：国家自然科学基金青年科学基金资助项目(52108273);东南大学新进教师科研启动经费资助项目(RF1028623073)。

摘　　要：为研究不同损伤模式对装配式T梁桥横向力学性能的影响,基于比拟正交异性板法理论计算,验证了有限元模型的可靠性;并且通过刚接梁法建立了主梁损伤的横向受力模型。针对现有装配式T梁桥可能存在的破坏形式以及破坏所处位置,建立不同损伤模型,分析了桥梁损伤后横向分布系数的变化情况。结果表明:在桥梁横隔板完好的情况下,翼缘板损伤对桥梁横向刚度影响较小,而在桥梁翼缘板完好的情况下,横隔板损伤对桥梁横向刚度影响较为显著;桥梁的横向联系损伤程度对较远桥梁影响较小。当仅有单一主梁损伤时,损伤梁的影响线竖标值减小,而周围完好梁的影响线竖标值增加,而多主梁损伤的情况下,总体趋势与单一主梁损伤相似,但破坏程度更为显著。In order to study the influence of different damage modes on the lateral mechanical properties of the prefabricated T-beam bridge,the reliability of the finite element model is verified based on the theoretical calculation of the comparative orthotropic plate method.The lateral force model of the main beam damage is established through the rigidly connected beam method..Based on the possible dam⁃age forms and damage locations of the existing prefabricated T-beam bridge,different damage models are established,and the changes in the transverse distribution coefficient are analyzed after the bridge is damaged.The results show that when the bridge diaphragm is intact,the damage to the flange plate has a small impact on the lateral stiffness of the bridge.When the bridge flange plate is intact,the dam⁃age to the diaphragm has a significant impact on the lateral stiffness of the bridge.The degree of dam⁃age to lateral connections has less impact on distant bridges.When only a single main beam is dam⁃aged,the vertical value of the influence line of the damaged beam decreases,while the vertical value of the influence line of the surrounding intact beams increases.In the case of damage to multiple main beams,the overall trend is similar to that of the damage to a single main beam,but the degree of dam⁃age is more significant.

关 键 词：装配式T梁 横向联系损伤 主梁损伤 

分 类 号：U448.231[建筑科学—桥梁与隧道工程] U445.7[交通运输工程—道路与铁道工程]