大跨径斜拉桥组合梁节段匹配制造足尺模型试验

发布时间：2018-01-13 03:37

本文关键词：大跨径斜拉桥组合梁节段匹配制造足尺模型试验　出处：《桥梁建设》2014年03期 　论文类型：期刊论文

【摘要】：泉州湾跨海大桥主桥为(70+130+400+130+70)m双塔分幅式组合梁斜拉桥,组合梁整体节段间桥面板采用匹配预制工艺,并通过钢梁反拱为桥面板提供横向预应力。为验证该桥组合梁整体节段匹配制造工艺可行性、掌握梁段经历横向反拱后的回弹规律,选取5个梁段进行组合梁足尺模型试验,并与有限元模型理论值进行对比分析。结果表明:所采用的整体节段匹配制造工艺及横向反拱设备是可行的;钢梁反拱至17~18mm时可为桥面板预存1.5~3MPa压应力,梁段在经历横向反拱过程后,将为组合梁节段桥位横向匹配连接累积不大于1.5mm的不利误差,这些数据将为实桥后续梁段匹配制造及安装施工参数的确定提供依据。
[Abstract]:The main bridge of Quanzhou Bay cross-sea bridge is a cable-stayed bridge with twin towers of 70 130 400 130 70 m, and the deck slab of the whole segment of composite beam is prefabricated with matching technology. In order to verify the feasibility of the matching manufacturing technology of the whole segment of the composite beam of the bridge, we can master the springback law of the beam segment after experiencing the transverse reverse arch. Five beam segments are selected for full-scale model test of composite beams, and compared with the theoretical values of the finite element model. The results show that the matching manufacturing technology of the whole segment and the transverse reverse arch equipment are feasible; When the steel beam is inversely arched to 17m ~ 18mm, the compressive stress of the deck slab can be pre-stored at 1.53 MPA, and the beam section is subjected to the process of transverse reverse arch. These data will provide the basis for the determination of the construction parameters of the matching and manufacturing of the subsequent beam segment of the composite bridge and the construction parameters for the construction of the transverse matching connection of the section of the composite beam. The accumulated errors are not more than 1.5 mm in the transverse matching connection of the section of the composite beam.
【作者单位】：中交第二航务工程局有限公司;长大桥梁建设施工交通行业重点实验室;
【分类号】：U448.27
【正文快照】： 1引言近年来,钢-混组合箱梁以其整体刚度大、耐久性好等优点在大跨径斜拉桥中得到广泛应用,已建的跨海通道主航道桥基本都采用这种主梁形式[1]。考虑作业环境、施工条件等因素,跨海大桥组合箱梁通常采用整体节段悬臂拼装工艺,其中节段间混凝土桥面板一般以湿接缝形式进行现场

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