The authors appreciate the support of project 948 of the State Forestry Administration (Project No. 2014-4-51),National Natural Science Foundation project of China, “Modern timber-concrete composite structure bridge design theory and applied basic research” (Project No. 51478485) and General research projects of Hunan Provincial Department of Education (17C1654). Shuai Yuan and Guojing He have made equal contributions to the work.
The authors appreciate the support of project 948 of the State Forestry Administration (Project No. 2014-4-51),National Natural Science Foundation project of China, ?Modern timber-concrete composite structure bridge design theory and applied basic research? (Project No. 51478485) and General research projects of Hunan Provincial Department of Education (17C1654). Shuai Yuan and Guojing He have made equal contributions to the work.