CAJ | 학술논문

为研究集中装药爆炸条件下地下直墙拱结构被覆段的荷载分布规律，通过野外抗爆模型试验测试土中自由场应力以及拱结构表面各点荷载的应力时程曲线。采用数据拟合与归一化方法，得到拱结构横断面及纵断面的荷载峰值分布规律包络图，并将测试结果与理论方法、数值手段的研究结果进行对比验证。结果表明，地下拱结构承受的动荷载与理论方法、数值手段得到的基本规律一致，呈类三角形分布。根据荷载分布情况，结合荷载作用面积的等效原理，提出局部动载的简化计算公式，给出地下拱结构抗化爆的荷载计算步骤。
위연구집중장약폭작조건하지하직장공결구피복단적하재분포규률，통과야외항폭모형시험측시토중자유장응력이급공결구표면각점하재적응력시정곡선。채용수거의합여귀일화방법，득도공결구횡단면급종단면적하재봉치분포규률포락도，병장측시결과여이론방법、수치수단적연구결과진행대비험증。결과표명，지하공결구승수적동하재여이론방법、수치수단득도적기본규률일치，정류삼각형분포。근거하재분포정황，결합하재작용면적적등효원리，제출국부동재적간화계산공식，급출지하공결구항화폭적하재계산보취。
For sake of disclosing dynamic loading distribution on straight-wall arch lining,the time-history curve of free field stress and the radial interface loading on the arch structure in soil are measured through field model test which subjected to blast loads. Through data fitting and normalization method,the envelope diagram of peak loading distribution on cross and longitudinal sections of arch structure are obtained. The results of theoretical and numerical methods are verified and compared with the measured loading distribution law. Results show a good agreement between experimental data and theoretical calculation and finite element computation. The dynamic loading on buried arch structure approximates a triangular distribution. Making use of equivalent principle of load distribution scale,a simplified linear function of local dynamic load is proposed and the loading calculation procedure of buried arch structure anti-blast loading is developed.