Based on the research background of Tong'an New Town Citizen Service Center project,this paper makes a special analysis of the irregular term of the cross-layer column.The rationality of the calculated length coefficient is checked by the global and local buckling a-nalysis method,and the nonlinear buckling analysis is carried out considering the comprehensive influence of the initial defects of the mem-bers,the P-△ effect of the eccentric bending moment and the material damage.The results show that the calculated length coefficient is close to the theoretical result when the finite element method is used for numerical simulation,which can be used as an important reference for design calculation.With the increase of the initial defect e0/L,the increase of the initial eccentricity △ and the attenuation of the elastic modulus,the stability of the cross-layer column is more unfavorable,and the excessive buckling deformation will lead to the early instabili-ty failure of the cross-layer column.The bearing capacity design is carried out through the comprehensive consideration of the performance analysis of medium earthquake,the shear section analysis of large earthquake,the damage judgment of large earthquake,the design of laye-ring and merging envelope,the shear amplification coefficient and the N-M curve of section,and the corresponding structural strengthening measures are put forward to provide reference for the design of the cross-layer column in the future project.
关键词
穿层柱/屈曲稳定/非线性屈曲分析/承载力设计/加强措施
Key words
Cross-layer column/Buckling stability/Nonlinear buckling analysis/Design of bearing capacity/Strengthen measures
维普
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