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基于振动台试验研究地震作用下钢筋混凝土平板结构有效宽度。主要研究转角处采用工字钢或槽钢(剪切头)剪切冲孔加固的板-柱连接件的性能。为此,建立平板的1∶2缩尺模型,平板由4种箱式钢柱支撑,承受逐步增加的模拟地震作用。试验结果表明:随着模拟地震作用强度的增加,有效宽度逐渐增加;同时,模拟地震作用造成的应变逆转使得钢筋与混凝土间粘结力减小,这将限制有限宽度的增加。此外,由于所使用的抗冲切钢材具有加固效果,有限宽度的试验结果与该文中所给公式的计算结果有着显著差异。
Study on effective width of reinforced concrete slab under earthquake action based on shaking table test. The main study at the corner of the use of I-beam or channel (shear head) shear punching reinforced plate - column connector performance. To this end, the establishment of flat 1: 2 scale model, the plate supported by four box steel columns, to withstand the gradual increase in the role of simulated earthquakes. The experimental results show that the effective width increases with the increase of the simulated earthquake intensity. Meanwhile, the strain reversal caused by the simulated earthquake reduces the bond strength between the reinforcement and the concrete, which will limit the increase of the finite width. In addition, the test results of finite width are significantly different from the formulas given in this paper because of the reinforcement effect of the punched steel used.