1. Key Laboratory of Urban Security, and Disaster Engineering of Ministry of Education, Beijing University of Technology, 100 Ping-Le Yuan, Beijing 100124, P. R. China
2. Department of Civil and Environmental Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA
3. Department of Mechanical Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA
4. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, 100 Ping-Le Yuan, Beijing 100124, P. R. China