1. School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China
2. MOE Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, P. R. China
3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, P. R. China
4. Department of Construction Engineering, National Yunlin University of Science and Technology, Yunlin, Taiwan, P. R. China