1. Professor, College of Civil Engineering and Architecture, Center for Balance Architecture, Zhejiang Univ., Hangzhou 310058, PR China.
2. College of Civil Engineering and Architecture, Center for Balance Architecture, Zhejiang Univ., Hangzhou 310058, PR China (corresponding author).
3. Doctorate Student, College of Civil Engineering and Architecture, Zhejiang Univ., Hangzhou 310058, PR China.
4. Professor, College of Civil Engineering and Architecture, Zhejiang Univ., Hangzhou 310058, PR China.