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制作比例为1∶10的13层带转换层的筒中筒结构模型,底部5层为钢管混凝土框支柱,上部转换为钢筋混凝土外框筒,内部为落地钢筋混凝土核心筒,高位转换且竖向刚度有突变,模型结构形式比较复杂。为了掌握复杂高层建筑结构的抗震性能,对模型施加不同工况的水平荷载,测试模型在水平荷载作用下的静力弹性性能。试验结果表明,竖向荷载能显著减少结构的侧向变形和扭转变形,水平荷载及偏心距大小与结构的侧向变形和扭转变形基本上呈比例关系,且变形符合叠加原理,结构的刚度突变使结构的侧向变形和扭转变形在转换层出现明显拐点。
A 13-layer model of the tube structure with transfer layers was made at a ratio of 1:10. The bottom five layers were concrete-filled steel tubular frame columns, the upper part was converted into a reinforced concrete outer frame tube, and the inside was a floor-standing reinforced concrete core tube with a high conversion and a vertical stiffness A mutation, the model structure is more complicated. In order to grasp the seismic performance of complex high-rise buildings, the horizontal loads of different working conditions are applied to the model to test the static elastic properties of the model under horizontal load. The test results show that the vertical load can significantly reduce the lateral deformation and torsional deformation of the structure. The horizontal load and eccentricity are basically proportional to the lateral deformation and torsional deformation of the structure. The deformation accords with the principle of superposition and the stiffness of the structure changes abruptly So that the structure of the lateral deformation and torsional deformation in the conversion layer apparent inflection point.