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动支座对拱结构抗爆承载力的影响
引用本文:宋春明,王明洋.动支座对拱结构抗爆承载力的影响[J].爆炸与冲击,2009,29(3):312-317.
作者姓名:宋春明  王明洋
作者单位:1.解放军理工大学工程兵工程学院,江苏 南京 210007
摘    要:建立了具有动支座拱的计算模型,该模型考虑了竖向的弹性支承和阻尼支承、水平向弹性支承和扭转约束等柔性支承形式。基于大变形动力微分方程并利用有限差分方法,研究了动支座拱在爆炸荷载作用下的动力响应,并分析动支座对结构承载力的影响。研究表明:动支座对拱的抗爆承载能力有较大影响,不同形式的柔性支承对拱承载力的影响截然不同,竖向弹性支承能够使爆炸荷载作用下拱的弯矩峰值减小,并且使到达峰值的时间增加,提高了拱的抗爆或承受瞬态荷载的能力。而水平弹性支承使拱的内力值和相对位移值增大,对结构的承载力不利。

关 键 词:爆炸力学    抗爆承载力    弹性支承    动支座        爆炸荷载

Effects of flexible supports on explosion resistant capabilities of arches
SONG Chun-ming,WANG Ming-yang.Effects of flexible supports on explosion resistant capabilities of arches[J].Explosion and Shock Waves,2009,29(3):312-317.
Authors:SONG Chun-ming  WANG Ming-yang
Institution:1.Engineering Institute, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China
Abstract:The mechanics models were established for arches with flexible supports at their ends.The flexible supports include vertical elastic and damping supports,horizontal elastic supports,and rotatable elastic supports.Based on the large deformation dynamic differential equations and finite difference method,the dynamic responses of arches subjected to explosive loading were explored,and the effects of flexible supports on explosion resistant capabilities were analyzed.The analysis shows that flexible supports ha...
Keywords:mechanics of explosion  bearing capability  elastic support  flexible support  arch  explosive loading  
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