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Study on Mechanical Performance of Steel Truss–Concrete Composite Girder During Post‑Rotation Jacking Process
Abstract：Post‑rotation jacking is a critical construction stage for load‑path reconstruction and alignment adjustment in rotation‑constructed bridges, particularly for ultra‑wide double‑deckcomposite girder systems. Taking a two‑span continuous steel truss–concrete compositegirderbridgewithspansof2×85mastheengineeringbackground,thisstudyinvestigatesthe mechanical behavior during post‑rotation ...
查看详情 →Experimental Study on Interface Friction and Pad Stability in Walking-Type Incremental Launching Construction Using Skid Shoes
Abstract： The frictional behavior and stability of skid shoe systems are critical to the safety andcontrollability of walking-type incremental launching for long-span steel truss bridges.Therefore, this study investigates friction control mechanisms and multilayer pad stabilitythrough two tests: (1) skid shoe tests to evaluate low-friction performance, sliding stiffness,and the stability of stacked ...
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桥梁平转重心轨迹与偏移计算方法研究
摘要：为掌握桥梁平转施工的姿态偏移情况，从而保证平转施工的稳定性，提出桥梁平转重心轨迹与偏移计算方法。该方法首先通过分析转体前称重试验数据，得到桥梁初始重心坐标；然后，结合空间运动几何关系，计算平转过程中的重心偏移及运动轨迹；最后，基于撑脚破坏、球铰转动失稳和转铰破坏三类破坏模式确定重心偏移阈值。以某斜拉桥桥塔转体施工为背景，引入惯性传感技术进行平转过程重心轨迹监测，分析桥塔重心轨迹和偏移情况，以验证所提方法的适用性。...
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基于低功耗无线采集节点的钢箱梁顶推施工监控
摘要：复杂环境下钢箱梁顶推施工存在约束严苛、受力控制难度大等技术难题，传统监测方案适配性不足。依托某跨绕城高 速大桥钢箱梁顶推工程，建立钢箱梁-导梁整体有限元模型，模拟顶推全过程力学响应；研发低功耗无线采集节点，设计针对性 监测方案并开展现场验。研究结果表明，有限元模型可精准计算分析顶推施工关键不利工况，为监测方案设计提供可靠理论 依据；自研采集节点具备免布线、长续航、强抗干扰等优势，有效解决了传统监测的适配难题；...
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Study on Mechanical Performance of Steel Truss–Concrete Composite Girder During Post-Rotation Jacking Process
转体后顶升是转体施工桥梁中实现受力路径重构、线形调位的关键施工工序，对于超宽双层组合梁体系尤为重要。本文以一座 2×85m 两跨连续钢桁 - 混凝土组合梁桥为工程依托，通过理论推导、有限元仿真与现场监测相结合的手段，研究转体后顶升全过程结构力学行为。
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