地面爆炸条件下框架底层柱的破坏公式推导及数值模拟分析

Derivation of Damage Formula about First-floor Column and Analysis of Numerical Simulation as Conventional Bomb Explosion on the Ground

由于常规武器地面爆炸时在地面附近形成了较为复杂的爆炸冲击波，该冲击波对附近军事目标的破坏非常严重。为便于对地面军事工程结构进行防护研究，有必要对军事工程结构的破坏距离进行预测和评估。在前人研究的基础上采用理论分析和数值模拟方法研究了常规武器地面爆炸条件下对框架底层柱的破坏作用。从理论上推导框架底层柱在遭受地面爆炸冲击荷载时的破坏程度预测公式，同时建立了炸药、空气、土壤和结构于一体的全耦合数值模型对推导公式进行了验证。结果表明理论推导和数值模拟计算结果较为一致，该公式可以为地面军事工程结构防常规武器打击提供一些建议和参考。

The military structure can be heavily damaged by complicated blast when the conventional bomb explodes near the structure. It is essential that we forecast and estimate the damage distance of military structures to facilitate the research on structural protection. Thus, above-ground explosion effects are studied through theoretical analysis and the simulation of LS- DYNA program. The formula for estimating the damage distance of frame column is presented. At the same time, the result cal- culated by the formula is contrasted to that computed by the same conditional coupled mode. The results from the two deferential means are in agreement. The analysis shows that the formula offers some good advices and references in the structural design to protect structures from blasting.