摘要
针对现行装配式桥梁预制盖梁组合钢模板(简称“钢模板”)普遍存在的投入成本高、成本回收周期长的问题,依托徐韩公路快速化改造工程和南京312国道改扩建工程,构建有限元实体模型,对钢模板的总体横肋间距、侧模板和端模板的竖肋间距及面板厚度进行分析和比较,以优化钢模板的构造参数,节约资源并提升经济效益。分析结果表明:现行的钢模板在构造参数方面仍有较大的安全储备,可以通过缩减横肋、竖肋间距和面板厚度的方法减少钢材的消耗。通过有限元法计算得到将横肋间距控制在0.525m左右、侧板竖肋间距控制在1.5m以内、面板厚度缩减至4~7mm之间并舍弃端板竖肋的优化方法。据估算,这种优化方式将节省40%左右的钢材,在满足工程需求的同时极大地减少工程造价。
In view of the problems of high investment and long payback period commonly existing in the current prefabricated bridge bent cap composite steel formwork(referred to as"steel formwork"),relying on the Xuhan Highway Rapid Reconstruction Project and Nanjing 312 National Highway Reconstruction and Extension Project,a finite element entity model is built to analyze and compare the overall transverse rib spacing of the steel formwork,the vertical rib spacing of the side formwork and the end formwork,and the panel thickness,so as to optimize the structural parameters of the steel formwork,save resources and improve economic efficiency.The analysis results show that the current steel formwork still has a large safety reserve in terms of structural parameters,and the steel consumption can be reduced by cutting down the intervals between transverse ribs and vertical ribs and the thickness of the panel.The optimization method of controlling the transverse rib spacing to about 0.525m,the vertical rib spacing of the side plate to within 1.5m,the panel thickness to 4~7mm and discarding the vertical rib of the end plate is obtained through the calculation of the finite element method.It is estimated that this optimization method will save about 40%of steel and greatly reduce the project cost while meeting the project demand.
作者
蔺娟
郎永贤
冯晓楠
曹瑞普
张建东
LIN Juan;LANG Yongxian;FENG Xiaonan;CAO Ruipu;ZHANG Jiandong(Qinghai Transportation Construction Management Co.,Ltd.,Xining 810003,China;JSTI Group Co.,Ltd.,Nanjing 210017,China;State Key Laboratory of Safety and Health of Long Bridges in Service,Nanjing 211112,China;School of Civil Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《建筑结构》
北大核心
2023年第S01期1281-1285,共5页
Building Structure
基金
青海省科技成果转化专项-前补助项目(2019-SF-127)
关键词
装配式桥梁
组合钢模板
预制盖梁
有限元
优化设计
refabricated bridge
composite steel formwork
prefabricated cover beam
finite element
optimization design
