1. Professor, School of Civil Engineering and Transportation, Beijing Univ. of Civil Engineering and Architecture, Xicheng District, Beijing 100044, China.
2. Graduate Research Assistant, School of Civil Engineering and Transportation, Beijing Univ. of Civil Engineering and Architecture, Xicheng District, Beijing 100044, China.
3. Assistant Engineer, Beijing General Municipal Engineering Design & Research Institute Co., Ltd., 32 Xizhimen North St., Haidian District, Beijing 100082, China.
4. Senior Engineer, Beijing Municipal Road and Bridge Building Materials Group Co., Ltd., A3 Santaishan Rd., Chaoyang District, Beijing 100176, China (corresponding author).