论文部分内容阅读
为提高超高层建筑中受大轴向压缩和地震作用的混凝土核心墙的延性,提出一种新型的高强混凝土双钢板组合墙(CFDSP)。CFDSP组合墙由在两个边界的钢管混凝土柱和混凝土双钢板墙体组成,混凝土双钢板墙体由垂直的肋板分成单元,单元之间用横向缀板相连。为深入研究这种新型CFDSP组合墙的结构机理,对12个受大轴向压缩力和反循环横向荷载的试样进行试验。由于钢板的宽厚比和缀板的位置较为合理,表面钢板并没发现明显的屈曲,所以在受力全过程中的表面钢板和高强混凝土可以较好的共存。所有样本都有饱满的滞回曲线和大的极限位移角,展现了其良好的耗能能力和变形能力,从而证明了当采用该文提出的新型组合墙时,高强混凝土可以用于其抗震结构中。根据试验结果分析刚度和强度降低的现象,并对所有样本的变形特性进行详细讨论。最后,介绍一种根据截面分析法得到的预测强度的方法,对日常的设计提出一些详细的建议。
In order to improve the ductility of concrete core walls under large axial compressions and earthquakes in super high-rise buildings, a new type of high-strength concrete double-steel composite wall (CFDSP) was proposed. CFDSP composite wall by the two boundaries of the concrete filled steel tubular columns and double steel wall composition, double-wall concrete by the vertical ribs into the unit, the unit is connected with the horizontal plate. In order to further study the structural mechanism of the new CFDSP composite wall, 12 specimens subjected to large axial compressive force and reverse cyclic loading were tested. As the width-to-thickness ratio of the steel plate and the position of the batten plate are more reasonable, no obvious buckling of the steel plate is found, so that the surface steel plate and the high-strength concrete can coexist well in the whole process of the stress. All samples have a full hysteresis curve and a large limit displacement angle, showing its good energy dissipation capacity and deformation capacity, which proves that when using the proposed new composite wall, high strength concrete can be used for its seismic structure in. According to the test results, the phenomenon of decrease of stiffness and strength was analyzed and the deformation characteristics of all the samples were discussed in detail. Finally, a method of predicting strength based on cross-sectional analysis is introduced, and some detailed suggestions on daily design are given.