作者机构:[1]Department of Civil Engineering, Tianjin University, Tianjin 300072, China, [2]HNTB Corporation, SantaAna, CA 92707, USA, [3]University of Southern California, Los Angeles, CA 90089-2531, USA
相关基金:Acknowledgements This study is supported by National Natural Science Foundation of China (No. 50978183) and Tianjin Natural Science Foundation (No. 07JCZDJC10100). This research was carried out when the second author studied for his Master's degree in Tianjin University during 2000 to 2003.