爆炸荷载下隧道口动力离心模型试验研究
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摘要
城市生命线工程如地铁隧道已经成为恐怖袭击的目标,抗爆防爆问题成为热点研究问题之一。文中采用清华大学50g-t土工离心机进行了爆炸离心模型试验,研究了隧道口区域在爆炸荷载作用下土体-结构物系统的动力响应规律。通过测量和分析土体位移得到了弹坑塑性区的界限,分析结构的应变响应,得出塑性区与结构的相对位置是影响结构响应的主要因素之一。
City lifeline project such as subway is likely to be the target of the attacks.Therefore,the anti-explosion and explosion protection of the tunnels is becoming a hot spot of research.Relying on Tsinghua University 50g-t geotechnical centrifuge,this paper has conducted a succession of explosion geotechnical centrifuge tests to explore the dynamic response law of soil-structure system.The extension of the plastic region surrounding the crater is ascertained through the measurement and analysis of the soil displacement.After strain-time analysis of the structure,we conclude that the relative position between plastic region and structure is one of the key factors which determine the structure's dynamic response.
City lifeline project such as subway is likely to be the target of the attacks.Therefore,the anti-explosion and explosion protection of the tunnels is becoming a hot spot of research.Relying on Tsinghua University 50g-t geotechnical centrifuge,this paper has conducted a succession of explosion geotechnical centrifuge tests to explore the dynamic response law of soil-structure system.The extension of the plastic region surrounding the crater is ascertained through the measurement and analysis of the soil displacement.After strain-time analysis of the structure,we conclude that the relative position between plastic region and structure is one of the key factors which determine the structure's dynamic response.
引文
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[2]边金,陶连金,等.强震下地铁车站结构动力响应特性[J].世界地震工程,2010,26(2):114-118.
[3]李秀地,郑颖人.坑道中冲击波冲量传播模型的试验[J].解放军理工大学学报(自然科学版),2007,8(5):425-428.
[4]Murphy G.Similitude in Engineering[M].New York:Ronald Press Co.,1950.
[5]Schmidt R M,Holapple K A.Theory and experiments on centrifuge cratering[J].Journal of Geophysical Research,1980,85(1):235-248.
[6]徐秉业,刘信声.应用弹塑性力学[M].北京:清华大学出版社,1995.
[7]孙玲玲.潜埋地铁隧道的震动响应研究[D].北京:清华大学,2008.
[8]马立秋.爆炸荷载下城市浅埋隧道动力离心模型试验和数值研究[D].北京:清华大学,2010.
[9]马立秋,张建民,张嘎,等.爆炸离心模型试验系统研究与初步试验[J].岩土力学(已录用).
[10]马立秋,张建民.爆炸离心模型试验研究进展与展望[J].岩土力学(已录用).
[11]马立秋,张建民.地表爆炸下浅埋地下结构物的离心模型试验研究[J].岩石力学与工程学报(已录用).
[12]马立秋,张建民.粘土爆炸成坑和地冲击传播的离心模型试验研究[J].岩石力学与工程学报(已录用).
[13]胡耘,张嘎,张建民,等.离心场中土体图像采集与位移测量系统的研制与应用[J].岩土力学,2010,31(3):998-1002.
[14]Bruce L,Kutter L,Moquette O’Leary,et al.Gravity-scaled tests on blast-induced soil-structure interaction[J].Journal of Geotechnical engi-neering American saiety of civil engineering.1988,144(4):431-447.
[15]刘清荣,黄文彬,译.在变形介质中冲击与爆破作用[M].北京:中国工业出版社,1965.