1. Associate Professor, Dept. of Civil Engineering, Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua Univ., Beijing 100084, China (corresponding author).
2. Professor, Dept. of Civil Engineering, Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua Univ., Beijing 100084, China.
3. Assistant Professor, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China.
4. Senior Engineer, Beijing Institute of Architectural Design, Beijing 100045, China.