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研究了城市轻轨高架桥胶接缝节段预制拼装体外预应力连续箱梁正截面抗弯等力学性能.以澳门C370轻轨高架桥为工程背景,分析了VIADUCT IS20-V01段连续梁构造特点,通过建立有限元模型,选取墩顶和跨中为控制截面,研究结构在不同工况作用下的应力状态并进行承载力计算.结果表明:截面应力、正截面抗弯、斜截面抗剪和抗裂能力均满足相关规范要求;在整体升温、降温作用下,各截面剪应力非常接近,可以忽略温度荷载对截面剪应力的影响.建议:在极限承载力状态设计下,对其抗弯刚度和抗剪承载力进行折减,可为类似桥梁结构计算提供参考.
The mechanical properties of normal prestressed continuous box girder with prefabricated prestressed continuous box girder are studied. The C370 light rail viaduct of Macao is taken as the background of the project to analyze the structural features of the continuous girder of VIADUCT IS20-V01. Through the establishment of finite Element model, the top and middle of the pier are selected as the control section, and the stress state of the structure under different working conditions is studied and the bearing capacity is calculated. The results show that the stress of cross section, the bending resistance of normal section and the shear resistance and crack resistance of oblique section And meet the requirements of the relevant norms; under the condition of overall temperature increase and temperature drop, the shear stress of each section is very close, and the influence of temperature load on the shear stress of section can be neglected.It is suggested that under the condition of ultimate bearing capacity, its bending rigidity and shear bearing The reduction of force can provide reference for the calculation of similar bridge structure.