1. Professor, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150088, China; School of Civil Engineering, Chongqing Univ., Chongqing 400045, China.
2. Graduate student, School of Civil Engineering, Chongqing Univ., Chongqing 400045, China.
3. Associate Professor, Dept. of Disaster Mitigation for Structures, Tongji Univ., Shanghai 200092, China (corresponding author).
4. Professor, School of Civil Engineering, Chongqing Univ., Chongqing 400045, China.
5. Professor, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150088, China.