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Damage of reinforced concrete columns under demolition blasting

机译:拆除爆破对钢筋混凝土柱的破坏

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摘要

The aim of this study was to qualitatively and quantitatively investigate the damage of RC column specimens in blasting tests, which was required to apply blasting demolition techniques to RC buildings with rather excessive reinforcement due to earthquake resistant design. In the blasting tests, the amount of explosives used and the longitudinal and shear reinforcement ratios and concrete strength of the RC column specimens were test variables. The test results revealed that the shear reinforcing bars confining the core concretes of the RC column specimens significantly affect the damage of the RC column specimens by the blasting. The analytical investigation supported that the residual resistances of the blast damaged RC column specimens can be evaluated through section analysis by considering the compressive buckling strength of the longitudinal reinforcing bars exposed by the blasting.
机译:这项研究的目的是定性和定量地研究爆破试验中钢筋混凝土柱标本的损坏,由于抗震设计,将爆破拆除技术应用于钢筋混凝土建筑中而采用的爆破拆除技术是相当必要的。在爆破试验中,使用的炸药数量以及RC柱试样的纵向和剪切增强比以及混凝土强度是测试变量。试验结果表明,限制钢筋混凝土柱样本核心混凝土的抗剪钢筋显着影响了爆破对钢筋混凝土柱样本的破坏。分析研究支持通过考虑爆破暴露的纵向钢筋的抗压屈曲强度,可以通过截面分析来评估爆破受损的RC柱样本的残余电阻。

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