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本文研究竖向荷载作用下现浇梁板协同工作性能对主次梁楼盖中主框架梁内力的影响。分析结果表明,完全弹性分析且梁翼缘宽度取全宽(即梁间距)时,主框架梁支座与跨中截面基本处于纯弯曲状态,而其截面弯矩可近似用仅考虑单向受力的杆系单元模型计算;当翼缘宽度减小时,梁支座截面和跨中截面分别处于偏心受压和偏心受拉状态。翼缘有效宽度内主框架梁的弯矩可用传统杆系单元模型估算。
In this paper, the effect of the co-operation of cast-in-situ girder under vertical load on the internal forces of the main frame girders in the main and secondary girders is studied. The analysis results show that when fully elastic analysis is taken and the width of beam flange is taken as full width (ie, beam spacing), the main frame beam abutment and midspan cross section are basically in a purely curved state, while the cross-section bending moment can be approximated by considering only the uniaxial force Rod unit model calculation; when the flange width decreases, the beam bearing cross section and the middle section are in the eccentric compression and eccentric tension state. The bending moment of the main frame beam within the effective width of the flange can be estimated using the traditional rod-unit model.