基于受压区高度调整的叠合梁纵筋应力全过程分析

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基金项目:

国家自然科学基金资助项目(50578011);高等学校博士学科点专项科研基金项目(20050004013)

FULL- COURSE ANALYSIS OF LONGITUDINAL STEEL STRESS IN COMPOSITE BEAMS BASED ON ADJUSTING OF DEPTH OF COMPRESSION ZONE

1.
School of Civil Engineering and Architecture,Beijing Jiaotong University Beijing 100044

摘要: 两阶段受力钢筋混凝土叠合式受弯构件的钢筋应力发展过程,伴随着两阶段受力对中和轴位置的影响。通过对受压区高度调整值的计算,以及对受压区混凝土应力图形特征系数的简化分析,提出该类构件的纵向钢筋应力全过程分析方法。通过叠合梁实例的计算,证明了该方法的简便性及可靠性,与ANSYS计算受力全过程中的纵筋应力计算值结果对比表明,两者的相对误差不超过5.5%。
- 叠合构件 /
- 两阶段受力性能 /
- 受压区高度 /
- 纵向钢筋应力 /
- 有限元分析
Abstract: Along with the development of the longitudinal steel stress in two-stage flexural RC composite members,location of neutral axis is influenced by twostage loading.Full-course analysis method for the stress in these members is given based on calculation of depth of compression zone and simplification of feature coefficient of stress diagrams.A composite beam is computed by the proposed method,and some verification from ANSYS is listed in the end.The results suggest that the method is feasible.The maximum fractional error of the computed value of longitudinal steel stress during full-course analysis between FEM and method in this paper is kept within 5.5%.
- omposite members /
- two-stage loading behavior /
- depth of compression zone /
- longitudinal steel stress /
- FEM