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鉴于制订我国“钢筋混凝土超静定结构考虑内力重分布计算规程”的需要,对集中荷载作用下的钢筋混凝土连续梁的抗剪强度进行了试验研究。本文介绍连续梁、约束梁抗剪强度的研究概况,并对各国设计规范中的抗剪计算公式作了比较,描述了八根钢筋混凝土两跨连续梁的试验和破坏情况,证实我国规范(TJ10—74)中的抗剪计算公式不适用于连续梁,证实连续梁的抗剪能力低于简支梁,并根据搜集到的187根连续梁、约束梁的试验数据,提出两个计算连续梁、约束梁抗剪强度的公式。
In view of the requirement of formulating the “Resolution for Calculating Internal Force Re-distribution of Reinforced Concrete Statically Indeterminate Structure” in China, the shear strength of reinforced concrete continuous beam under concentrated load was experimentally studied. This paper introduces the general research status of shear strength of continuous beams and restrained beams, and compares the shear calculation formulae in the national design specifications, describes the test and damage of eight continuous reinforced concrete two-span continuous beams, and verifies the Chinese regulations (TJ10). The formula for shear resistance in —74) is not applicable to continuous beams. It is proved that the shear resistance of continuous beams is lower than that of simply supported beams. Based on the experimental data of 187 consecutive beams and restrained beams collected, two calculated continuous beams are proposed. The formula for restraining the shear strength of beams.