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基于拉、压杆模型理论,分析了小跨高比连梁内部传力机制,确定其受弯、受剪承载力。分别计算了三种抗剪机制承担剪力的大小,由叠加法和杠杆法分别确定最终受剪、受弯承载力。计算结果与试验结果对比分析表明,推导的小跨高比连梁承载力计算公式与试验结果基本吻合,由计算剪弯比确定的小跨高比连梁破坏模式与实际破坏模式一致。
Based on the theory of tension and compression rod model, the mechanism of internal force transmission in the beam with small span ratio is analyzed and the flexural and shear capacity of the beam is determined. The shear strength of three kinds of shearing mechanism is calculated separately, and the final shear and flexural bearing capacity are respectively determined by the superposition method and the leverage method. Comparing the calculated result with the test result, the calculated formula of the bearing capacity of the beam with small span ratio is in good agreement with the test result. The failure mode of the beam with small span ratio is consistent with the actual failure mode.