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偏心受压构件由于应力沿截面分布不均匀,紧箍力分布也不均匀,因而它列核心混凝土承载力的影响显得十分复杂。为了获得偏心受压构件中紧箍力的变化规律,本文根据试验结果提出了等效紧箍力的概念,分别引入偏心率影响系数和长细比影响系数;然后根据等效紧箍力进行偏心受压构件强度和稳定承载力的计算。本文还导出了偏压短柱(λ≤20)形成塑性铰时的强度承载力计算公式。推荐的计算公式既有一定的理论根据,又经和大量的实验结果对比,吻合程度较好,多数还稍偏于安全方面,可供设计应用。研究室的同志参加了实验工作和部分分析整理工作。
Due to the uneven distribution of stress along the cross-section of the eccentric compression member and the uneven distribution of the tight hoop force, the influence of its bearing capacity on the core concrete is very complicated. In order to obtain the variation law of the tight hooping force in the eccentric compressive member, the concept of the equivalent tight hooping force was put forward according to the test results. The influence coefficient of the eccentricity and the influence ratio of the slenderness ratio were respectively introduced; then the eccentricity was calculated according to the equivalent buckling force. The compression member strength and the stability of the bearing capacity calculation. This paper also derives the calculation formula of strength bearing capacity when a short column (λ ≤ 20) is formed with a plastic hinge. The proposed calculation formula not only has certain theoretical basis, but also compares with a large number of experimental results, and the degree of agreement is good. Most of them are also somewhat safer and can be used for design and application. The comrades in the laboratory participated in the experimental work and some analysis and finishing work.