FRP桥梁上部结构的撞击破坏实验研究  

COLLISION TEST OF A FRP BRIDGE BEAM

作　　者：冯鹏[1] 胡楠[1] 何水涛[1] 陆新征[1] 

机构地区：[1]清华大学土木工程系清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《玻璃钢／复合材料》2011年第5期24-28,共5页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金资助项目(50808106);科技部国际合作项目(2010DFR50400);清华大学骨干人才计划项目

摘　　要：近年来,纤维增强复合材料(FRP)已经在桥梁工程中获得了逐步推广和应用,尤其是在人行天桥的设计和建设中。但是,超高车辆撞击城市桥梁上部结构的事故频繁发生,严重威胁城市交通的正常运行。为确保FRP结构能更广泛地应用于城市桥梁中,提高其作为上部结构的抗撞能力,需要深入研究超高车辆-FRP结构碰撞机理。本文基于碰撞试验,对典型的超高车辆-桥梁上部结构碰撞进行了模拟,确定了此类梁的撞击破坏过程,位移响应,作用方式和损坏机理。分析结果将用于有限元分析和验证中,从而改进FRP上部结构应对此类冲击荷载时的结构响应。With the increasing expansion in civil engineering in recent years,fiber reinforced polymer（FRP） has been recognized as a competitive material to those conventional materials in bridge structures,especially for footbridge design and construction.However,collision accidents between over-high trucks and bridge superstructures frequently happened,which seriously threaten the safety of bridges and traffic system of city.To ensure FRP structure can be more widely used for bridge construction,FRP structure-vehicle collision mechanism should be studied,so as to improve collision-resisted ability of bridge superstructure.In this paper,a collision testing between over-high trucks and bridge superstructure was carried out,including failure process,displacement response,and failure mode and mechanism.The test results will be used for finite element analysis and further verification,so as to improve structural performance of FRP superstructure under such impact load.

关 键 词：桥梁工程 撞击实验 FRP结构 桥梁上部结构 超高车辆 

分 类 号：TB332[一般工业技术—材料科学与工程]