拆除爆破中墙体剪切坍塌模型及力学判据研究

提出了墙体剪切坍塌破坏的结构模型，从能量观点出发，结合对模型的分析给出了墙体爆破缺口的实用计算方法.通过对拆除爆破中墙体发生剪切坍塌的力学条件分析，给出了墙体剪切长度的计算公式.上述研究为拆除爆破中运用延时爆破改变楼房的破坏机制，控制坍塌姿态提供了理论依据.图2，表2，参6.

Study on the shearing collaose model and mechanical criteria of wall in demolition blasting

The shearing collapse model of wall in demoliting blasting is put forward.Form energy point,combining with analysis of model,the theory practical method of wall′s cutting height size is supplied.The formula desmontrates that wall's cutting height size is related to the height of the lowest storey(H1) the length of wall(L) and the thicknes of wall(B1).The formula of calculating the shearing length of wall is given after mechanical condition analysis of wall′s shearing collapse in demoliting blasting.Four examples are given ,and the results are satisfactory.The illustrate that the shearing collapse model of wall in demolition blasting is rational.These studies are expected to supply theoretical basis of control the building′s collapse state in terms of delayed explosion in different part of wall in demolition blasting.2figs.,2tabs.,6refs.