| Ancient Chinese architecture is an important part of Chinese civilization,which is beautifully sculpted and famous for its grandeur.It not only shows the history and culture of China,but also the crystallization of previous wisdom.Chinese ancient architecture is dominated by wooden structures.Because of the influence of nature and human beings,it can be preserved to a very small extent.In order to better inherit and develop Chinese culture,antique buildings combining modern technology and materials with ancient architectural forms are gradually emerging.In order to improve the seismic performance of concrete archaized buildings,this paper combines modern energy dissipation technology with the unique forms of archaized buildings and designs a beam-column Subassemblage of concrete archaized buildings with viscous dampers for further study of energy dissipation in concrete archaized buildings in the future.In this paper,six beam-column subassemblage of concrete archaized buildings are designed and divided into two groups: SLJ series model(single beam-column subassemblage)and DLJ series model(double beam-column subassemblage).Each group consists of one comparative model and two test models installed with different model of viscous dampers.The MTS electro-hydraulic servo loading system is used to rapidly and dynamically load the module.The seismic behavior of the module with viscous dampers was compared and analyzed,including the hysteresis curves,skeleton curves,ductility performance,stiffness degradation,and strength degradation of the module.The research results are as follows: The energy dissipation capacity of the modules with viscous dampers increased significantly,and the test specimens increased significantly.The energy dissipation factor increased by approximately 41.0%.The difference of viscous damper parameters has different effects on SLJ series module and DLJ series module.The yield load,peak load and damage load of each module increased by approximately 27.1%~51.3%,16.2%~41.1%,and 16.1%~49.2% respectively,The SLJ series module is obviously improved than the SLJ series module;The ductility coefficient of SLJ series module and DLJ series module increased by approximately 4.7% and 13.5%,respectively;The strength degradation of modules is reduced,stiffness is increased,and the trend of stiffness degradation is basically same.Based on the test data of the concrete archaized buildings beam-column subassemblage under sinusoidal dynamic loading,the trilinear restoring force model of the beam-column subassemblage was established by the test fitting method.It includes the following : Based on the skeleton curve data,a non-dimensionalized trilinear skeleton skeleton model was established by the Origin fitting analysis.Based on the test data of each working condition,the stiffness degradation regularity of this type of model was established by an exponential fitting analysis.The hysteretic rule of this kind of model was established by the skeleton curve model and the law of stiffness degradation.Final establishment of restoring force model for concrete beam-column subassemblage with attached viscous damper.Through comparison and analysis of the skeleton curve obtained from the experiment and the established skeleton curve,it is found that the consistency is good,indicating that the restoring force model can better reflect the restoring force characteristics of the new type of archaized building beamcolumn subassemblage.The archaized building beam-column subassemblage with viscous damper provides reference for elastic-plastic seismic response analysis. |
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