国家自然科学基金41002127;交通运输部建设科技项目N0.201331849A130;福建省交通运输科技发展项目No.201242.This work was supported by the National Natural Science Foundation of China41002127;the Construction Science and Technology Project from Ministry of Transport of China201331849A130;the Science and Technology Project from Transportation Department of Fujian Province201242