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对2根钢-混凝土组合梁加宽混凝土T梁构件进行试验(共分4种弹性工况与1种破坏工况),量测并分析了试件的荷载、挠度、反力及应变,观测了试件的裂缝发展情况。对弹性工况下的挠度、支座反力横向分布规律进行了研究,并对破坏工况下的构件极限抗弯承载力进行了理论分析。结果表明:荷载作用在L/4与L/2处时挠度横向分布规律相同,其分布系数与刚性横梁法、修正刚接梁法计算结果吻合良好;荷载作用在L/4与L/2处时支座反力横向分布规律相同,其分布系数与杠杆法计算结果吻合良好;破坏工况下组合梁与混凝土T梁呈现出典型的弯曲破坏,构件抗弯承载力等于组合梁与混凝土T梁抗弯承载力之和。
Two concrete-filled beams of steel-concrete composite beams with T-beams were tested (four elastic conditions and one failure condition). The load, deflection, reaction force and strain of the test specimens were measured and analyzed. Pieces of crack development. The deflection and the lateral distribution of bearing reaction force under elastic conditions were studied, and the ultimate bearing capacity under failure condition was analyzed theoretically. The results show that the law of transverse deflection of deflection is the same at L / 4 and L / 2, and its distribution coefficient is in good agreement with that of rigid beam method and modified beam method. Load is at L / 4 and L / 2 The lateral distribution of reaction force is the same, and its distribution coefficient is in good agreement with the result of the lever method. The failure of the composite beam and the concrete T beam shows typical bending failure, and the flexural capacity of the member is equal to that of the composite beam and the concrete T beam The sum of carrying capacity.