某高层剪力墙结构不均匀沉降分析及处理  

Analysis and treatment of uneven settlement of a high⁃rise shear wall structure

作　　者：陈大川[1] 唐弋斌 常科龙 郭杰标 CHEN Dachuan;TANG Yibin;CHANG Kelong;GUO Jiebiao(College of Civil Engineering,Hunan University,Changsha 410082,China;Hunan Daxing Reinforcement and Reconstruction Engineering Co.,Ltd.,Changsha 410006,China)

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]湖南大兴加固改造工程有限公司,长沙410006

出　　处：《建筑结构》2024年第11期113-118,共6页Building Structure

基　　金：“十三五”国家重点研发计划资助(2016YFC0701308)。

摘　　要：无新增荷载情况下的持续不均匀沉降常常发生在地基有缺陷的高层建筑中,该类沉降产生的破坏是缓慢持续的。地基不均匀沉降会导致建筑物开裂、倾斜,进一步发生结构安全事故。依据某高层剪力墙结构以及不均匀沉降监测数据,采用ABAQUS建立该高层剪力墙结构三维有限元计算模型,分析不均匀沉降工况下上部结构的内力分布及整体变形发展规律。结果显示,有限元计算得到的模型内力增大位置与实际外墙主要开裂位置相吻合,整体沉降变形发展规律与现场实测数据基本一致,证明上部结构三维有限元模型的可行性。进一步建立剪力墙结构-桩筏基础-地基耦合计算模型,开展不同筏板厚度对整体结构不均匀沉降的影响分析。同时结合实际案例制定“增设筏板+补桩”处理方法,加固完成后监测数据显示房屋处于稳定状态,变形与裂缝均无发展。The persistent uneven settlement without additional loads often occurs in high⁃rise construction with defective foundations,and the damage caused by this type of settlement is slow and continuous.Uneven settlement of the foundation will cause the building to crack and tilt,and further structural safety accidents will occur.Based on the monitoring data of a high⁃rise shear wall structure and uneven settlement,the ABAQUS was used to establish a three⁃dimensional finite element calculation model of the shear wall structure,and the internal force distribution and overall deformation development law of the upper structure under the condition of uneven settlement was analyzed.The results show that the finite element calculated internal force increase position of the model is consistent with the actual main cracking position of the outer wall,and the development law of the overall settlement and deformation is basically consistent with the field measured data,which proves the feasibility of the three⁃dimensional finite element model of the superstructure.The coupling calculation model of shear wall structure⁃pile⁃raft foundation⁃foundation was further established,and the influence of different raft thicknesses on the uneven settlement of the overall structure was analyzed.At the same time,the treatment method of"adding rafts+piles"was formulated in combination with actual cases.After reinforcement,the house is in a stable state,and there are no signs of development of deformation and cracks.

关 键 词：持续不均匀沉降 三维有限元模型 高层剪力墙结构 桩筏基础 沉降控制 

分 类 号：TU973[建筑科学—结构工程]