地下综合管廊燃气舱内爆炸下结构动力响应规律
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长安大学

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中图分类号:

O383+.2

基金项目:

国家自然科学基金项目(NO.51579013);西安市建委城建专项资金支持项目(SJW2017-13);中央高校资助项目(300102289303)


Study on Dynamic Response Law of Structure Under Explosion in Gas Cabin of Underground Integrated Pipe Gallery
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Affiliation:

1.Chang'2.'3.an University

Fund Project:

Project of national natural science foundation of China (no.51579013); Xi 'an municipal construction commission urban construction special fund support project (sjw2017-13); Central university funding project (300102289303)

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    摘要:

    通过ANSYS/LS-DYNA动力有限元软件,建立土体与地下三舱综合管廊耦合模型,采用隐式-显式顺序求解的分析方法,模拟燃气舱在1kg、5kg、20kg、40kgTNT药量下的内爆情况。研究结果表明:①炸药量对燃气舱的影响最为显著,其次综合舱,电力舱影响最小,燃气舱内左侧隔墙的破坏相比其它墙板破坏更严重,其破坏处为墙板交接处和各板中间附近位置。②燃气舱内空气中心线上的冲击波超压峰值在传播过程中呈现出先减小后增大最后减小的趋势,其中当炸药量20kg、40kgTNT时,其超压峰值会2-5m范围内出现较大的波动。③位移时程曲线基本遵循随着炸药量的增加而增加,部分测点后半时程会出现较大差异。在40kgTNT炸药量爆炸荷载下,燃气舱上顶板较下底板的位移影响较大,其最大值能达到0.7cm,且残余变形为0.5cm左右。

    Abstract:

    Through ANSYS/LS-DYNA dynamic finite element software, the coupling model of soil mass and underground three-compartment comprehensive pipe gallery was established, and the analytical method of implicit and explicit sequential solution was adopted to simulate the implosion of gas tank at 1kg, 5kg, 20kg and 40kgTNT.The research results show that: (1) the explosive quantity has the most significant impact on the gas tank, followed by the integrated tank, the power tank has the least impact, the damage of the left partition wall in the gas tank is more serious than other wallboard damage, the damage is the wallboard joint and the middle of the board near the position.(2) in the process of propagation, the overpressure peak of the shock wave on the air Central Line in the gas tank first decreases, then increases and finally decreases. When the explosive amount is 20kg and 40kgTNT, the overpressure peak will fluctuate within 2-5m.(3) the displacement time history curve basically follows the increase with the increase of the explosive amount, and the second half time history of some measuring points will show great difference.Under the explosive load of 40kgTNT, the displacement of the upper roof of the gas tank has a greater impact than that of the lower floor, with its maximum value reaching 0.7cm and residual deformation around 0.5cm.

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武泽元,田威,王亚威. 地下综合管廊燃气舱内爆炸下结构动力响应规律[J]. 科学技术与工程, 2019, 19(32): 31-36.
wuzeyuan,,wangyawei. Study on Dynamic Response Law of Structure Under Explosion in Gas Cabin of Underground Integrated Pipe Gallery[J]. Science Technology and Engineering,2019,19(32):31-36.

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历史
  • 收稿日期:2019-04-24
  • 最后修改日期:2019-07-11
  • 录用日期:2019-07-09
  • 在线发布日期: 2019-12-04
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