CAJ | 학술논문

以某多跨空心板简支梁桥工程为例，在病害调查、技术状况评价的基础上，提出了取消全桥伸缩缝和支座的全桥整体化改造方案，包括拆除桥梁上部结构，新设计的上部结构体系仍采用预制空心板，结构体系为先简支后连续结构；对桥台处主梁和连接结构进行改造，取消桥墩和桥台处的伸缩缝，同时取消全桥支座，将上、下部结构通过钢棒连接。最后对该桥整体化改造前后的受力性能进行对比分析。结果表明：这种通过体系转化的主动加固方法可以提高结构的承载力，改善结构的受力状况；将该桥改造成为整体式桥梁可以有效提高其使用性能，免除伸缩装置和支座的养护、维修，提高桥梁的可持续发展能力。
이모다과공심판간지량교공정위례，재병해조사、기술상황평개적기출상，제출료취소전교신축봉화지좌적전교정체화개조방안，포괄탁제교량상부결구，신설계적상부결구체계잉채용예제공심판，결구체계위선간지후련속결구；대교태처주량화련접결구진행개조，취소교돈화교태처적신축봉，동시취소전교지좌，장상、하부결구통과강봉련접。최후대해교정체화개조전후적수력성능진행대비분석。결과표명：저충통과체계전화적주동가고방법가이제고결구적승재력，개선결구적수력상황；장해교개조성위정체식교량가이유효제고기사용성능，면제신축장치화지좌적양호、유수，제고교량적가지속발전능력。
Taking a multi‐span hollow slab simply‐supported bridge as example ,a new kind of integral transformation scheme by canceling the whole bridge expansion joints and bearings was proposed based on the disease investigation , technical condition evaluation . The integral transformation design of the bridge included removing the superstructure of the bridge ,and the new superstructure system still used precast hollow slab ,whose structural system was from the simply‐supported structure to the continuous one .Then the connection structure between the beam end and the approach slab was transformed by canceling the expansion joint of the bridge pier and abutment .The superstructure and substructure were connected by the steel bar after canceling the w hole bridge bearing .Finally ,comparison and analysis of the mechanical behaviors before and after integral transformation of the bridge were carried out .The results show that the kind of active reinforcement method by the system transformation can improve the bearing capacity and the mechanical performance of the structure .The transformation of integral bridge can effectively improve the usability ,avoid the maintenance and repairing of bridge expansion joints and bearings ,and improve the ability of sustainable development of the bridge .