Structural Design And Analysis Of Timber Arch Bridge In Style Of Bianshui Rainbow Bridge

China wooden arch bridge originated in the Northern Song Dynasty in Bianjing, was first found in "Riverside Scene at Qingming Festival". It is famous for its woven timber arch structure. As timber arch bridge was found late, and few structure and bridge engineers engaged in its research, now it is lack of researches on theory and mechanical performance of the key-value part, which is the moven timber arch structure composed of two systems. And Fujian and Zhejiang wooden arch bridge has been included in thecandidate list of the world’s intangible cultural heritage". Therefore, the experiment reported here, the evolution of the structural system of Bianshui Rainbow Bridge is investigated, the structure algorithm is studied, the structure of Bianshui Rainbow Bridge is restored, through the calculation diagram of bearing structure, the loading tese of the recuperative bridge is carried out, the deformation mode of vertical bearing structural system and the whole transverse forced deformation performance are analysed, the working principle, such as force transfer and structural stiffness of bearing structure of the recuperative bridge is researched. According to the modified finite element model of actual bridge’s loading tests’curve, structural performance and finite parameter are analysed, and structural mechanical behavior of Bianshui Rainbow Bridge is further analysed from the angel of structure mechanical behavior. The main contents and research conclusions are as follows:(1) Through literature research and field surveys, Fujian and Zhejiang wooden arch bridge has significant heritage building constructed on the relationship between the mechanical properties and structure with Bianshui Rainbow Bridge. However, they have a significant local characteristics. Fujian and Zhejiang wooden arch bridge is a product of integration with the local culture. Fujian and Zhejiang wooden arch bridge has better integrity, stability and durability, and to provide more social functions.(2) Taking Bianshui, of Riverside Scene at Qingming Festival"as the prototype, conducted Bianshui Rainbow Bridge style wooden arch bridge rehabilitation design and construction. Administration of the wooden arch bridge design and construction process showed Bianshui Rainbow Bridge style wooden arch structure is simple, easy construction, with better economy.(3) The static load tests under symmetrical load and asymmetric load of actual bridge are carried out. The experimental results show that under symmetrical load, the deformation of main arch is symmetric, on both sides of side span, the first beam node displacement scratched up, at midspan deflection, The maximal displacement occurs across locations; Under asymmetrical load, the deformation of main arch is anti-symmetric, loading place downwarping, loads on the symmetrical side scratched, Maximum downward displacement is under the action of cross, maximum upward displacement is antisymmetric position.(4) The finite element program Midas/Civil was applied for analyzing actual bridge. The results show that, the finite element analysis results agree well with the testing results. The deformation structure under asymmetric load is bigger than the one under symmetric load, so the design of woven timber arch structure is controlled by asymmetric load. Both vertical displacement and longitudinal displacement are produced when timber arch bridge is under load case, but the deformation is very small. The main rod of each arch is more uniform stress distribution with allowable value and in accordance with specification. Description This shows Bianshui Rainbow Bridge style wooden arch bridge has good mechanical performance.