【摘要】 拆除爆破已广泛应用在建筑物拆除施工中,但对于结构塌落体产生的触地振动效应,目前尚无成熟有效的预测和评价方法。本文运用非线性科学理论,建立了一个基于Volterra泛函级数的非线性预测模型,该模型可以在结构倒塌前即能预测塌落体触地诱发的触地振动效应,能够充分体现岩土介质在冲击载荷下的非线性力学响应特征。同时,针对Volterra非线性模型提出了基于独立脉冲荷载的简化识别方法。在实际工程中的应用表明,预测结果与实测结果吻合较好,并且应用简便,对预防和降低结构倒塌触地振动效应产生的危害具有一定的借鉴意义。更多还原

【Abstract】 Demolition blasting has been widely used in the demolition of a building,but at present,about the touchdown vibration effects of structural collapse during demolition,there is no proven effective method of prediction and evaluation.Based on the theory of nonlinear science,a nonlinear prediction model based on Volterra functional series is created.The model can predict touchdown vibration effect induced by the collapsed building hitting superficial soil before the structural collapse.The model can fully reflect the nonlinear response characteristics of rock and soil media under the impact loading.At the same time,based on the nonlinear Volterra model of independent pulsed loads,a simplified identification method is put forward.The practical engineering application shows that the predictions and the measured results match well and the application of the model is simple.There is some significance to prevent and reduce the harm of vibration effects arisen from structural collapse hitting the ground.更多还原