基于玄武岩纤维布的在役简支板桥静动载试验研究  

Static and Dynamic Load Test Research of In-Service Simply Supported Slab Bridge Based on Basalt Fiber Sheet

作　　者：李红鸽 李冰川 张瀚誉 李勇[2] LI Hongge;LI Bingchuan;ZHANG Hanyu;LI Yong(Bridge and Culvert Management Office,Road and Bridge Facilities Management and Protection Center in Shijiazhuang City,Shijiazhuang 050000,China;The Key Laboratory of Roads and Railway Engineering Safety Control,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄市道桥设施管护中心桥涵管理所,河北石家庄050000 [2]石家庄铁道大学道路与铁道工程安全保障教育部重点实验室,河北石家庄050043

出　　处：《国防交通工程与技术》2022年第1期77-80,共4页Traffic Engineering and Technology for National Defence

基　　金：河北省重点研发计划(21375403D);河北省自然科学基金项目(E2020210017);河北省高等学校科学技术研究项目(BJ2018048);石家庄铁道大学优秀青年科学基金(2018-01);石家庄铁道大学研究生创新资助项目(YC2021014);河北省住建厅建设科技研究指导性计划项目(2020-285)。

摘　　要：玄武岩纤维复合材料(BFRP)具有较好的力学性能及耐久性,在桥梁加固领域得到了推广应用。为评价粘贴BFRP布对在役简支板桥的加固提升效果,以经BFRP布加固的在役简支板桥为研究对象进行静动载试验。通过静载试验测得控制截面的应力状态和挠度变形,通过环境激励试验、行车试验研究桥梁的自振特性以及在不同车速下结构的冲击系数。研究结果表明:静载试验证实BFRP布可以提高桥梁的承载能力与结构整体刚度,改善结构应力分布;环境激励试验表明,粘贴BFRP布能提高结构的竖向一阶自振频率;粘贴BFRP布能降低结构的动挠度、动应变及竖向振动速度,而结构的冲击系数与竖向振动加速度的变化趋势与行车速度有关。Basalt fiber composite material(BFRP) has good mechanical properties and durability,and has been popularized and applied in the field of bridge reinforcement.In order to evaluate the effect of pasting BFRP sheet on the reinforcement and improvement of the in-service simply supported slab bridge,a static and dynamic load test was carried out with an in-service simply supported slab bridge reinforced by BFRP sheet as the research object.The stress state and deflection deformation of the control section were measured through static load tests,and the natural vibration characteristics of the bridge and the impact coefficient of the structure at different vehicle speeds were studied through environmental pulsation tests and driving tests.The static load test proves that BFRP sheet can improve the bearing capacity of the bridge and the overall rigidity of the structure,and improve the structural stress.Environmental excitation test shows that pasting BFRP sheet can increase the vertical first-order natural frequency of the structure.Pasting BFRP sheet can reduce the dynamic deflection,dynamic strain and vertical vibration speed of the structure,and the change trend of the impact coefficient and vertical vibration acceleration of the structure is related to the driving speed.

关 键 词：玄武岩纤维布 在役桥梁 静动载试验 加固效果 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]