CAJ | 학술논문

桥梁的设计主要针对运营阶段荷载，而施工过程中结构可能承受不利的施工荷载。为避免结构在施工过程中受到破坏，应用FINAL有限元分析软件对某桥墩进行非线性分析。重点研究预应力混凝土盖梁上侧及其与钢筋混凝土墩柱结合处的受力状态。首先建立结构的三维有限元分析模型；然后分析结构在张拉预应力钢筋、承受较大偏心施工荷载、承受竣工阶段荷载时的受力状态，并针对出现的问题提出可以采取的措施，将采取措施前后结构的受力状态进行对比。结果表明施工过程中梁柱结合处会出现裂缝，拟采取的措施可有效避免混凝土开裂，从而为桥梁施工工艺的选取提供理论指导，并为今后类似工程的建设提供借鉴。
교량적설계주요침대운영계단하재，이시공과정중결구가능승수불리적시공하재。위피면결구재시공과정중수도파배，응용FINAL유한원분석연건대모교돈진행비선성분석。중점연구예응력혼응토개량상측급기여강근혼응토돈주결합처적수력상태。수선건립결구적삼유유한원분석모형；연후분석결구재장랍예응력강근、승수교대편심시공하재、승수준공계단하재시적수력상태，병침대출현적문제제출가이채취적조시，장채취조시전후결구적수력상태진행대비。결과표명시공과정중량주결합처회출현렬봉，의채취적조시가유효피면혼응토개렬，종이위교량시공공예적선취제공이론지도，병위금후유사공정적건설제공차감。
The design of bridge is primarily based on the operational phase loads but the structure may bear unfavorable construction loads during construction.In order to avoid the damage of the structure during con-struction,nonlinear analysis of the bridge pier by using FINAL finite element analysis software,focusing on the stress state of the upper side of prestressed concrete cap beam and its j unction section with reinforced con-crete column.Firstly,a 3D finite element analysis model of the structure is established.Then,the load con-ditions of the structure under prestress,eccentric construction loads and completion phase loads are analyzed. Some appropriate measures are proposed in light of the problem.Meanwhile,the results of taking measures are compare proposed.The results show that the j unction section may crack during construction and the measures can control the crack efficiently,so as to provide theoretical guidance to the choice of construction process and a reference to the similar proj ects in the future.