摘要
针对厦深高速铁路榕江特大桥柔性拱与桁架上弦相交处A28整体式节点,开展了在正常使用阶段设计荷载作用下1∶3缩尺模型静力试验研究和足尺模型有限元分析,研究该节点在多向拉压荷载作用下的应力分布特征。结果表明,自平衡加载环适用于承受荷载大、多向拉压的整体式节点的静力加载;A28节点缩尺模型试验过程未发生明显变形;试件钢板始终处于弹性阶段,最大应力为181.7 MPa;A28节点的足尺有限元分析表明,节点中心区域处于双向受力状态,节点在各荷载工况作用下均安全可靠。
In this research,a 1∶ 3 scaled model was tested to investigate the stress state of the integral joints( A28) of arch rib and top chord in the Rongjiang Bridge in Xiashen High Speed Railway in service stage. Meanwhile,a verified finite element model was built up to numerically obtain the static behavior of the full-scale joint under multi-directional tension and pressure loadings. It is noted that the self-balance loading ring is suitable for the experiment of the integral joints under multi-directional large loadings. It can be observed that no visual deformation occurs during the test,the stress of the scaled model is always in the elastic stage under different loading cases and the maximum stress is181. 7 MPa. It can be concluded from the simulation results that the central region of the joint is under biaxial stress state and this integral joint is safe in service stage.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2015年第S1期131-137,共7页
Journal of Building Structures
基金
国家"十二五"科技支撑计划(2011BAJ09B02)
国家自然科学基金项目(51208148)
关键词
桥梁工程
整体式节点
多向拉压
静力试验
应力分布
bridge engineering
integral joint
multi-directional loadings
static test
stress distribution
