土工防爆墙倾覆稳定性分析

蒋志刚;孔晓鹏;谭清华;曾首义

振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 86-90.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 86-90.
论文

土工防爆墙倾覆稳定性分析

  • 蒋志刚;孔晓鹏;谭清华;曾首义
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ANALYSIS ON THE OVERTURN STABILITY OF GEOTECHNICAL EXPLOSION-PROOF WALLS

  • JIANG Zhigang; KONG Xiaopeng; TAN Qinghua; ZENG Shouyi
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摘要



基于文献试验,建立了土工防爆墙倾覆稳定计算方法。假设墙体在水平均布冲击波荷载作用下绕墙趾产生刚体转动,分别得到了指数衰减荷载和瞬时冲量荷载作用下墙体转动线性微分方程的解析解和倾覆稳定系数计算公式,并采用Rung-Kutta法求解墙体转动非线性微分方程和倾覆稳定系数的数值解。对于文献中的两种土工防爆墙,解析解、数值解与试验结果比较表明:理论计算与试验结果吻合较好;可忽略冲击波加载时程和墙体转动微分方程非线性对倾覆稳定系数的影响,按瞬时冲量荷载下的解析解计算倾覆稳定系数,并取容许倾覆稳定系数为1.1。






Abstract

Based on the experiments in references,an approximation to the overturn stablity of geotechnical explosion-proof wall was developed. It was assumed that horizontal blast loading pressure is applied uniformly to the front surface of the wall and the wall rotates around one of its bottom corner as a rigid body. Analytical solutions to the linear differential eqation and formulas of overturn stablity factor were obtained for two blast load models of exponentially decayed load and instantaneous impluse load respectively. The Rung-Kutta method was used for the numerical solutions to the nonlinear differential equation and overturn stablity factor. For two geotechnical explosion-proof walls from references,the results from the present analytical and numerical solutions were compared with experimental results from references,which shows that the theoretical results are in good agreement with experimental ones. The influnces of the blast loading time and the nonlinearity of the differential equation on the overturn stablity factor are negligible,and the overturn stablity factor from the analytical solution of instantaneous impluse load is reliable with the allowable overturn stablity factor 1.1.

关键词

爆炸冲击 / 防爆墙 / 稳定性 / 解析解 / 数值解

Key words

explosive impact / explosion-proof wall / stability / analytical solution / numerical solution

引用本文

导出引用
蒋志刚;孔晓鹏;谭清华;曾首义. 土工防爆墙倾覆稳定性分析[J]. 振动与冲击, 2010, 29(10): 86-90
JIANG Zhigang;KONG Xiaopeng;TAN Qinghua;ZENG Shouyi. ANALYSIS ON THE OVERTURN STABILITY OF GEOTECHNICAL EXPLOSION-PROOF WALLS[J]. Journal of Vibration and Shock, 2010, 29(10): 86-90

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