大跨度变截面钢箱梁托管桥安全监测设计与成果分析  

Design and Result Analysis of Safety Monitoring for Large Span and Variable Cross Section Steel Box Girders Managed Bridge

作　　者：梁迟 郝永志[1] LIANG Chi;HAO Yong-zhi(Xinjiang Water Resources and Hydropower Survey Design and Research Institute Co.Ltd.,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,乌鲁木齐830000

出　　处：《水利科技与经济》2024年第5期40-45,共6页Water Conservancy Science and Technology and Economy

摘　　要：针对目前国内单跨跨度最大的变截面连续钢箱梁桥面上铺设的输水管道直径最大的托管桥桥体应力应变、竖向挠度以及桥上输水管道应力应变监测成果进行分析。结果表明,钢箱梁上下表面的钢板应力均与环境温度呈负相关,与过水荷载大小呈正相关;桥体竖向挠度与过水荷载呈正相关,运行期变形量较首次通水时小;输水管道钢板应力分布上基本呈底部最大、左右管腰次之、顶部最小。This paper studies and analyzes the stress-strain,vertical deflection and stress-strain monitoring results of the trusteeship bridge body with the largest diameter of the water pipeline laid on the deck of the variable cross-section continuous steel box girder bridge with the largest single span in China.The stress of the steel plate on the upper and lower surfaces of the steel box girder is negatively correlated with the ambient temperature and positively correlated with the magnitude of the water load;the vertical deflection of the bridge body is positively correlated with the water flow load,and the deformation during operation is smaller than that during the first water flow;the stress distribution of the steel plate in the water pipeline is generally the highest at the bottom,followed by the left and right pipe waists,and the lowest at the top.

关 键 词：大跨度钢箱梁 托管桥 安全监测 成果分析 

分 类 号：U445.47[建筑科学—桥梁与隧道工程]