Study On The Structural And Seismic Performance Of Multi-storey Ancient Chinese Timber Structure Shangyou Tower Of Palace Style

The ancient Chinese timber structure is an invaluable heritage of Chinese history andculture, which is constantly enriched and developed for thousands of years, becomes profoundand unique architectural wonders. It not only has a gorgeous appearance, but also a veryreasonable structure. Study shows that, timber structure has the following characteristics: floatedflat contact between column foot and column base, semi-rigid connection of mortise and tenon,the tou-kung layer between roof and beam frame, special material properties of the wood itself.All of those make the ancient timber structure have a very good aseismatical performance.First of all, this paper studies the mortise and tenon connection, tou-kung as well as theconnection of column foot. Firstly, by summarizing the research results of the past, gets thesimplified formula of stiffness of the mortise and tenon connection, the P-Δ linearitystrengthening elastoplasticity model of tou-kung under the horizontal load and the vertical loadaction, the equations of motion of tou-kung under the horizontal and the vertical earthquakeaction, as well as connection characteristics between column foot and column base. Secondly,the finite element model of mortise-tenon connection and connection of column foot areestablished, by using nonlinear contact element of software ANSYS, the finite element model oftou-kung is established by using beam element and spring element. After correlation analysis,the stiffness value in each direction of the mortise and tenon connection, the deformationcharacteristics of tou-kung under the horizontal and vertical loads are deduced.Secondly, in order to study the structural and aseismatical performance of multi-storeyancient Chinese timber structure Shangyou tower of palace style, two finite element models (a timber structure model and the corresponding reinforced concrete structure model) were built.Article uses ANSYS10.0software, Analysis types including static, modal and dynamic timehistory analysis. Combin14spring elements combination was used to simulate the mortise andtenon connection, tou-kung and the connection of column foot.By static analysis, it can be seen that the structure under the static action is safe. Moreoverthe material strength also has a very big margin.Through the modal analysis to the two models, their first10step cycles were obtained. Itcan be seen that the cycle of the timber Structure is much larger than the reinforced concretestructure. The results comparison indicated that the timber Structure has very good ductility.The ancient Chinese timber structure has a very good aseismatical performance, which canbe proved by the time history analysis of the two models. The dynamic magnification factor ofeach layer was obtained, finally indicated that the peak acceleration of the timber structuredecreasing from low to high layer. The total dynamic magnification factor is about0.5. On thecontrary, the peak acceleration of reinforced concrete structure model increasing from low tohigh layer.By the results analysis of the two models, it can be seen that the vibration isolationperformance of the ancient Chinese timber structure mainly manifests in the column foot, tenonand mortise connection and the tou-kung layer. The timber Structure has very good ductility,Able to achieve the effect of soft beat strong.The analysis methods and conclusions can be referenced to study the preservation andrehabilitation of other ancient structures.