| Shear wall structure is a main structural system of high-rise building structure. It has larger stiffness and better seismic performance (compared to frame structure). The shear wall structure can dissipate the earthquake energy well by the plastic hinges of coupling beams, which are reasonable designed and constructed. So the concept“Strong wall piers and week coupling beams”is proposed in structural seismic design approach. Along with the development of seismic theory research, performance based seismic design (PBSD) approach is became one of the most popular topics in seismic research field. PBSD which is applied to the shear walls structure is presented in this paper. The author gain the deformation limit values under different earthquake levels of shear walls and coupling beams from component test and finite element analysis, and applied these deformation limit to the seismic design of a shear wall structure.The main research include of several parts:(1) Based on objected-oriental technology, the approach of setting up structural elastic-plastic analysis platform is proposed, and elastic-plastic analysis program MESAP is built. This platform is appropriate for the secondary development of element models and material models. A large number of components with different parameters can be analyzed by this platform. The platform can be used as an nonlinear analysis tool for shear walls and coupling beams.(2) A macro shear wall element (MVLEM) which can consider the interaction of axial-flexure deforamtion of shear wall is developed in MESAP platform. According to the verification of the flexure-controlled shear wall test, the element is appropriate for elastic-plastic analysis of flexure-controlled shear walls.(3) A plane element (MCFT) which can consider the interaction of axial-shear-flexure deforamtion of shear wall is developed in MESAP platform. According to the verification of the shear-controlled shear wall test, the element is appropriate for elastic-plastic analysis of shear-controlled shear walls.(4) According to Chinese codes, a number of flexure-controlled shear wall specimens are designed, which consider the influence of different reinforcements, different axial force level and different dimensions. MVLEM element of MESAP is used for the elastic-plastic analysis of these specimens. Force-deformation skeleton curve (F-D curve) of shear walls is gained. By these curves the yield deformation and ultimate deformation are computed. Based on above calculation results, the deformation limit state of flexure-controlled shear walls under frequent earthquake, moderate earthquake and severe earthquake is deduced.(5) According to Chinese codes, a number of shear-control shear wall specimens are designed, which consider the influence of different reinforcements, different axial force level, different dimensions and different height-width ratio. MCFT element of MESAP is used for the elastic-plastic analysis of these specimens. By F-D curves ultimate deformation are computed. Based on above calculation results, the deformation limit state of shear-controlled shear walls under frequent earthquake, moderate earthquake and severe earthquake is deduced.(6) According to Chinese codes, a number of shear-controlled coupling beam specimens are designed, which consider the influence of different reinforcements, different stirrup ratios, different span-depth ratios and different dimensions. MCFT element of MESAP is used for the elastic-plastic analysis of these specimens. By F-D curves the ultimate deformation are computed. Based on above calculation results, the deformation limit state of shear-controlled coupling beams under frequent earthquake, moderate earthquake and severe earthquake is deduced.According to Chinese codes, a number of flexure-controlled coupling beam specimens are designed. The flexibility based fiber element of MESAP is used for the elastic-plastic analysis of these specimens. By F-D curves the yield and ultimate deformation are computed. Based on above calculation results, the deformation limit state of flexure -controlled coupling beams under frequent earthquake, moderate earthquake and severe earthquake is deduced.(7) The secondary development of Perform-3D is preceded in this paper. The secondary development program can be a tool for PBSD approach. The deformation limit state of shear walls and coupling beams which are discussed in this paper are built in the program.(8) Based on shear walls structure example, this paper discuss the operation process of PBSD and the application of the deformation limit state. Finally, the paper shows how to use PBSD approach in the high-rise building structure, which exceeds the limitation of Chinese codes. The application indicated the significance of the research of PBSD and deformation limit state of shear wall components. |
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