荆岳长江公路大桥索塔锚固区实桥受力机理试验研究

发布时间：2018-04-25 03:28

本文选题：斜拉桥 + 索塔锚固区　；参考：《桥梁建设》2014年06期

【摘要】：湖北荆岳长江公路大桥主桥为(100+298)m+816m+(80+2×75)m双塔混合梁斜拉桥,索塔锚固区采用钢牛腿+钢锚梁结构。为掌握斜拉索索力在实桥索塔锚固区结构上的响应和受力机理,在该桥成桥荷载试验阶段选择南塔第26节段进行了试验测试。通过测试钢锚梁、钢牛腿的应力和变形,并与同节段索塔锚固区节段模型试验结果进行比对分析。结果表明:在试验荷载作用下,试验节段实测索力增量与理论索力增量相差不大;在相同索力增量下,实桥锚固区的应力测试值、钢锚梁的水平力和竖向力荷载承担比例均比节段足尺模型试验值略小,二者的应力分布规律基本一致,这些试验监测数据可供今后类似桥梁设计时参考。
[Abstract]:The main bridge of Jingyue Changjiang River Highway Bridge in Hubei Province is a cable-stayed bridge with a double tower of 802 脳 75m and a steel corrugated steel anchor beam structure is used in the anchoring area of the cable tower. In order to understand the response and stress mechanism of cable-stayed cable force on the structure of anchoring zone of real bridge tower, the section 26 of south tower was selected for test at the loading test stage of the bridge. The stress and deformation of steel anchor beam and steel corbel are tested and compared with the model test results of the same segment cable tower Anchorage zone. The results show that under the action of test load, there is little difference between the measured cable force increment and the theoretical cable force increment, and under the same cable force increment, the measured stress in the anchoring zone of the real bridge is measured. The load-bearing ratio of horizontal force and vertical force of steel anchor beam is slightly smaller than that of full-scale model test, and their stress distribution is basically the same. These test monitoring data can be used for reference in the design of similar bridges in the future.
【作者单位】：沪汉蓉铁路湖北有限责任公司;中铁大桥局集团桥科院有限公司;中铁大桥局集团有限公司;
【分类号】：U448.27;U446.1

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