1. School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China
2. School of Civil Engineering, Qinghai University, Xining 810016, China
3. School of Engineering, University of Virginia, Charlottesville, VA 22904, USA
4. Department of Civil Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si 17104, Republic of Korea