Three dimensional numerical simulation of residential building on shrink–swell soils in response to climatic conditions |
| |
| Authors: | Xiong Zhang Jean‐Louis Briaud |
| |
| Institution: | 1. Department of Civil and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, AK, U.S.A.;2. Zachry Department of Civil Engineering, Texas A&M University, College Station, TX, U.S.A. |
| |
| Abstract: | Shrink–swell soils can cause distresses in buildings, and every year, the economic loss associated with this problem is huge. This paper presents a comprehensive system for simulating the soil–foundation–building system and its response to daily weather conditions. Weather data include rainfall, solar radiation, air temperature, relative humidity, and wind speed, all of which are readily available from a local weather station or the Internet. These data are used to determine simulation flux boundary conditions. Different methods are proposed to simulate different boundary conditions: bare soil, trees, and vegetation. A coupled hydro‐mechanical stress analysis is used to simulate the volume change of shrink–swell soils due to both mechanical stress and water content variations. Coupled hydro‐mechanical stress‐jointed elements are used to simulate the interaction between the soil and the slab, and general shell elements are used to simulate structural behavior. All the models are combined into one finite element program to predict the entire system's behavior. This paper first described the theory for the simulations. A site in Arlington, Texas, is then selected to demonstrate the application of the proposed system. Simulation results are shown, and a comparison between measured and predicted movements for four footings in Arlington, Texas, over a 2‐year period is presented. Finally, a three‐dimensional simulation is made for a virtual residential building on shrink–swell soils to identify the influence of various factors. Copyright © 2015 John Wiley & Sons, Ltd. |
| |
| Keywords: | residential building shrink– swell soils unsaturated soils coupled hydro‐mechanical stress analysis jointed elements general shell elements rainfall solar radiation air temperature relative humidity wind speed field tests |
|
|
