| 基坑开挖对邻近不同刚度建筑物影响的三维有限元分析 |
| |
| 引用本文： | 李志伟,郑刚.基坑开挖对邻近不同刚度建筑物影响的三维有限元分析[J].岩土力学,2013,34(6):1807-1814. |
| |
| 作者姓名： | 李志伟 郑刚 |
| |
| 作者单位： | 1.福建省建筑科学研究院，福州 350025；2.福建省绿色建筑技术重点实验室，福州 350025； 3.天津大学 土木工程系，天津 3000723；4.天津大学 滨海土木工程结构与安全教育部重点实验室，天津 300072 |
| |
| 摘 要： | 受各种因素的影响,基坑邻近建筑物的刚度差异显著。为了解基坑开挖对邻近不同刚度建筑物的影响,在考虑土体小应变刚度行为的基础上,对基坑邻近不同刚度建筑物的变形展开精细化分析。算例结果表明:对于任意刚度的建筑物,当其跨越坑外沉降槽最低点以及上凸曲率最大点时,墙体所产生的拉应变最为显著,即此时对于任意刚度的建筑物来说,均为最为不利位置。随着建筑物刚度的增大,墙体挠度值与拉应变值呈对数曲线下降。当建筑物整体刚度较差时,其墙体拉应变更主要取决于坑外沉降幅度,而受自身刚度影响较小。当建筑物刚度较大时,在基坑变形的影响下,建筑物更主要表现为刚体运动,而自身内部变形则相对较小。
|
| 关 键 词： | 基坑 建筑物 三维有限元分析 刚度 墙体拉应变 |
| 收稿时间： | 2012-05-03 |
Finite element analysis of response of building with different stiffnesses adjacent to excavation |
| |
| LI Zhi-wei、,ZHENG Gang、.Finite element analysis of response of building with different stiffnesses adjacent to excavation[J].Rock and Soil Mechanics,2013,34(6):1807-1814. |
| |
| Authors: | LI Zhi-wei、 ZHENG Gang、 |
| |
| Institution: | 1. Fujian Academy of Building Research, Fuzhou 350025, China; 2. Fujian Key Laboratory of Green Building Technology, Fuzhou 350025, China; 3. Department of Civil Engineering, Tianjin University, Tianjin 300072, China; 4. MOE Key Laboratory of Coast Civil Structure Safety, Tianjin University, Tianjin 300072, China |
| |
| Abstract: | Affected by various factors, the stiffness difference of the building adjacent to the excavation is significant. In order to understand the effect of the stiffness difference of building, the response of the building with different stiffnesses adjacent to excavation is analyzed subtly considering the small strain stiffness behavior of soil. The analytical results show that when the building with different stiffnesses locates over the lowest point and the hogging zone of the settlement trough, the tensile strain of the wall is the most obvious. In this case, the locations for any stiffness buildings are in most adversities. With the increase of the stiffness of the building, the deflection and the tensile strain of the wall decrease as the logarithmic curve. For the building with low stiffness, the tensile strain of wall chiefly depends on the extent of the settlement trough and is less affected by its stiffness. When the stiffness of the building is large, the performance of the building affected by the excavation primarily appears as rigid body motion, but the internal deformation of the building is relatively small. |
| |
| Keywords: | excavation building 3D-FE analysis stiffness tensile strain of wall |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
