既有砌体结构型钢夹墙节点筏板工作性状研究  

Research on the work characteristics of reinforced concrete-steel encased wall joints with raft foundation

作　　者：刘书昊 刘冬林 范超颖 LIU Shuhao;LIU Donglin;FAN Chaoying(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Administrative Approval Bureau of Fucheng County,Hengshui City,Hebei Province,Hengshui 053000,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]河北省衡水市阜城县行政审批局,河北衡水053000

出　　处：《甘肃科学学报》2024年第6期44-49,共6页Journal of Gansu Sciences

摘　　要：针对既有砌体结构新增筏板存在墙体或基础损伤的问题,提出一种型钢夹墙筏板节点,通过缩尺模型试验研究了所提型钢夹墙筏板节点与传统销键穿墙节点的受力性能,得出型钢夹墙节点具有更好的抗弯抗剪承载性能;采用有限元对不同地基基础参数型钢夹墙节点筏板的受力进行研究,得到不同地基土模量、不同筏板厚度条件下筏板板底土反力分布和墙体应力分布。最后分析型钢夹墙节点的破坏模式,所得结论可为类似地基基础加固工程提供理论参考和工程借鉴。In response to the presence of wall or foundation damage in existing masonry structures with added raft slabs,a novel steel-encased wall-raft slab joint is proposed.The structural performance of this steel-encased joint and the conventional key-through-wall joint is investigated through scaled-model experiments,revealing that the steel-encased joint exhibits superior flexural and shear load-carrying capacity.Finite element analysis is employed to investigate the load response of steel-encased wall-raft slab joints under different foundation parameters.The distribution of soil reaction at the bottom of the raft slab and the stress distribution in the wall are obtained for various foundation soil moduli and raft slab thicknesses.Furthermore,the failure mode of the steel-encased joint is analyzed.The obtained conclusions provide theoretical references and engineering insights for similar foundation reinforcement projects.

关 键 词：砌体结构 型钢夹墙筏板节点 筏板工作性状 破坏模式 

分 类 号：TU362[建筑科学—结构工程]