CAJ | 학술논문

荷载试验是评估桥梁实际工作状态和承载能力最直接的方法，也是评定桥梁结构的使用状况的有效方法。文章以塘屿刚架拱桥为工程实例，通过对桥梁结构在荷载作用下的应变、变形、振动频率及振幅等实际响应的研究，阐述了荷载试验的静载试验和动载试验过程，分析了荷载试验结果，阐明了桥梁结构承载能力与工作状态。结果表明：静载试验中，荷载试验效率为0．96～1．00，测试截面的混凝土应力校验系数为0．23～0．82，钢筋应力校验系数为0．04～0．12，试验桥跨的强度能够满足设计荷载的使用要求；动载试验中，实测竖向变形校验系数均值为1．10，自振频率为3．91 Hz，冲击系数为0．35，均小于规范限值或理论计算值要求，使得桥跨的竖向整体刚度不足，冲击效应偏大。
하재시험시평고교량실제공작상태화승재능력최직접적방법，야시평정교량결구적사용상황적유효방법。문장이당서강가공교위공정실례，통과대교량결구재하재작용하적응변、변형、진동빈솔급진폭등실제향응적연구，천술료하재시험적정재시험화동재시험과정，분석료하재시험결과，천명료교량결구승재능력여공작상태。결과표명：정재시험중，하재시험효솔위0．96～1．00，측시절면적혼응토응력교험계수위0．23～0．82，강근응력교험계수위0．04～0．12，시험교과적강도능구만족설계하재적사용요구；동재시험중，실측수향변형교험계수균치위1．10，자진빈솔위3．91 Hz，충격계수위0．35，균소우규범한치혹이론계산치요구，사득교과적수향정체강도불족，충격효응편대。
Load tests,including static and dynamic tests,are the most direct and effective method, which can be used to identify and evaluate the working performance and actual load-bearing capacity of bridges,and to provide basic data for the bridge maintenance and reinforcement.Taking Tangyu reinforced concrete rigid frame arch bridge as engineering background,the paper studies the actual response of the bridge (such as strain,deformation,frequency and amplitude,etc.),briefly introduces the testing process,and assesses the test results,the working performance and carrying capacity of the bridge.Test results show that the carrying capacity of the bridge complied with the design requirement,with the response ratio of test load to design load was 0.96 ~1.00 and the concrete and steel verification coefficient was 0.23 ~0.82,0.01 ~0.12,respectively,which does not exceed the specification limit,but the vertical stiffness of the bridge is inadequate and its impact effect is relatively large,with testing deformation verification coefficient,measured vibration frequency and impact factor were 1.08 (maximum of 1.30),3.91Hz and 0.35,respectively,which not meeting the standard limit value or theoretical value requirements.