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对两个缩比为1/15的三层、两跨、两开间的钢筋混凝土框架模型进行了地震模拟试验,输入ElCentro(1940NS)地震波。研究了在质量偏心和双向地面运动情况下结构从弹性、开裂、屈服直至破坏等各阶段的地震反应。揭示了结构的动力特性随着裂缝和塑性变形的发展而变化的规律。对结构的空间地震反应与平面地震反应的试验结果进行了比较,揭示了这两者的抗震性能的差异,同时将试验结果与理论计算值进行了比较,表明二者符合良好。
A seismic simulation test was carried out for two reinforced concrete frame models with three-layer, two-span, and two-opening frames with a reduction ratio of 1/15, and ElCentro (1940NS) seismic waves were input. The seismic response of the structure from elasticity, cracking, yielding to failure and so on was studied under mass eccentricity and two-way ground motion. It reveals that the dynamic characteristics of structures change with the development of cracks and plastic deformation. Comparing the experimental results of the spatial seismic response of the structure with that of the plane seismic response, the differences in the seismic performance of the two are revealed, and the experimental results are compared with the theoretically calculated values, indicating that the two are in good agreement.