摘要
当爆点偏向结构一侧时,结构会发生部分受荷的情况,从而导致结构的内力及破坏形式发生变化;讨论爆点位于侧向时结构的受荷范围,给出荷载计算公式;将地下结构与周围介质的相互作用关系等效成为一种阻尼作用,从而在结构动力方程中加入相互作用因素,通过方程求解得到结构振动响应的解析解;利用这种方法推导出远场任意角度爆炸荷载作用下结构的响应计算公式,并在侧向爆炸条件下得到结构的位移和最大弯矩分布曲线。
When the centre of explosion is at one side of structure,only part of the structure will subject to explosion load.In this condition,the inner stress and the types of failure of the structure will change greatly.Load distribution is discussed for side blast.The calculation of load is given out.A damping action is used to replace the interaction between structure and the surrounding soil.So the soil-structure interaction is inserted into the controlling equation.And then the exact solution can be obtained by solving the equation.Method is obtained to calculate reaction of the structure when the centre of explosion is in arbitrary position far enough from the structure.And the distribution of displacement and maximum moment are got for side blast.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第A02期3478-3481,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金创新研究群体科学基金(51021001)
国家自然科学基金资助项目(51078351)
重庆交通大学(桥梁)结构工程重点实验室开放基金(CQSLBF-Z11-1)
关键词
爆炸力学
侧向爆炸
地下拱形结构
相互作用
动力响应
explosion mechanics
side blast
underground arch structure
interaction
dynamic response
