基于Duncan-Chang模型的高层建筑物分层总和法沉降计算与场地变形分析  

The layerwise summation method for ground foundation settlement calculation and regional deformation analysis of high-rise building based on Duncan-Chang constitutive model

作　　者：江勇顺[1,2] 唐浩 李天斌 JIANG Yongshun;TANG Hao;LI Tianbin(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology,Chengdu 610059,China;Sichuan Transportation Investment Group Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]地质灾害防治与地质坏境保护国家重点实验室(成都理工大学),成都610059 [2]四川省交通投资集团有限责任公司,成都610041

出　　处：《成都理工大学学报（自然科学版）》2018年第5期626-632,共7页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金项目(41172279)

摘　　要：为研究某新建高层建筑物的沉降变形受场地条件差异及相邻既有建筑物的影响,基于Duncan-Chang模型计算地基沉降分析的方法和分层总和法规范修正公式,对该建筑物的沉降变形进行了对比计算;通过广泛布设沉降监测点,进一步分析了场内建筑物在建设不同阶段的沉降时空规律。结果表明,采用筏板基础的建筑物受荷载及不均匀沉降影响,存在"中间下凹,四周上翘"的挠曲变形特点。同时,在既有建筑物阻挡下,建筑物不同位置的沉降大小受到不同程度"抑制"。随着时间推移,沉降绝对值逐渐减小并在某一时期沉降趋于停止。The settlement deformation of high-rise building is affected by difference of construction site conditions and adjacent buildings. Comparative calculation for the settlement deformation of high rise building is carried out based on Duncan Chang constitutive model and correction formula of the layerwise summation method. Through extensive layout of the monitoring points, the time and space regulation of settlement in the building field in different stages of construction is analyzed. It shows that the building with rapt foundation affected by loads and differential setdement exhibits the deformation feature of concave in the middle and upward in the periphery. At the same time, under the blockage of existed buildings around, the settlement at different locations of newly built buildings is suppressed. As time goes on, the absolute settlement gradually decreases and tends to be stable aPtera certain period.

关 键 词：高层建筑 沉降量 DUNCAN-CHANG模型 分层总和法 时空规律 

分 类 号：TU470.3[建筑科学—结构工程]