马鞍山长江公路大桥三塔斜拉桥参数分析与施工控制  

Parameter analysis and construction control of Ma'anshan 3-tower Cable-stayed Bridge

作　　者：张玉平[1] 谢文昌 李传习[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2015年第2期37-42,共6页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51378080);科技部"973"计划项目(2015CB057700);长沙理工大学桥梁与隧道工程创新性项目(11CA09)

摘　　要：针对马鞍山长江公路大桥右汊三塔斜拉桥的结构特点,建立了有限元计算模型,对斜拉索索力、混凝土箱梁板厚和桥面铺装厚度等技术参数进行参数分析,探讨了这些参数在三塔斜拉桥中的施工控制标准。计算结果表明,马鞍山长江公路大桥右汊三塔斜拉桥索力控制和箱梁板厚应制定比"施工技术规范"和"评定标准"更为严格的施工控制标准,纵向主边跨斜拉索的索力差宜控制在3%以内,不能超过8%;板厚平均超厚1cm会给线形控制带来较大的麻烦,箱梁板厚平均误差应控制在0.5cm以内。若马鞍山长江公路大桥三塔斜拉桥桥面铺装厚度平均超厚1cm,则结构应力超限,应适当调整斜拉索索力。Aiming at the structural characteristics of Ma＇ anshan 3-tower Cable-stayed Bridge, a finite element model is built to analyze the cable force, the thickness of plates of concrete box girder and the thickness of pavement. Construction control standards of these three parameters have been discussed in 3-tower cable-stayed bridge and calculating results indicate that：more stringent construction control standards on the cable force and plates ~ thickness of Ma＇ anshan 3-tower Cable-stayed Bridge need to be developed than the ＂con- struction technical specification＂ and the ＂evaluation criteria＇. First, the cable force error between main span and side span should be controlled in 3% and cannot exceed 8%.Secondly, the pavement＇s average thickness error should be controlled in 0.5cm for 1 cm＇s increase of it may cause big problem in linear control.At last, 1cm＇s increase of the average thick- ness of pavement of Ma＇anshan 3-tower Cable-stayed Bridge will lead to the overstressing of structure and the appropriate adjustment of cable force.

关 键 词：桥梁工程 三塔斜拉桥 有限元 参数分析 施工控制 

分 类 号：U445.38[建筑科学—桥梁与隧道工程]