近场爆炸时斜拉索抗爆性能分析

振动与冲击 ›› 2020, Vol. 39 ›› Issue (21) : 250-257.

论文

近场爆炸时斜拉索抗爆性能分析

沈达佳，胡志坚，李杨

作者信息 +

Anti-explosion performance of stay cable under near field blast load

SHEN Dajia, HU Zhijian, LI Yang

Author information +

文章历史 +

摘要

为研究爆炸荷载作用下斜拉桥斜拉索的动力响应，基于爆炸基本理论，开展近爆作用下斜拉索的抗爆性能分析，对斜拉索应力和损伤进行分析，进一步就不同比例距离展开参数化分析。研究结果表明：近场爆炸荷载下，斜拉索不会出现断裂，其破坏形式表现为应力超过屈服应力带来的失效；斜拉索最薄弱的位置是索梁锚固区，该区域斜拉索的应力由于爆炸冲击波的反射大于靠近爆点的斜拉索；给出了保持斜拉索不失效的安全比例距离为0.287 m/kg1/3，可认为大于该临界比例距离时，斜拉索不会发生失效。

Abstract

In order to study dynamic response of a stay cable of cable-stayed bridges under blast loading, based on the basic blast theory, the anti-explosion performance of the cable under near field blast loading was analyzed.Stress and damage of the cable were analyzed, and further the parametric analyses for different scaled distances were performed.Results showed that under near field blast load, fracture does not appear on the cable, and its failure mode presents a failure caused by its stress exceeding yield one;its weakest position is the cable-girder anchorage zone where the stress of the cable is larger than that of the cable near explosion point due to reflection of blast wave; the safe scaled distance to keep the cable from failure is 0.287 m/kg1/3,if the scaled distance is larger than this critical scaled distance, the cable can’t fail.

导出引用

沈达佳，胡志坚，李杨. 近场爆炸时斜拉索抗爆性能分析[J]. 振动与冲击, 2020, 39(21): 250-257

SHEN Dajia, HU Zhijian, LI Yang. Anti-explosion performance of stay cable under near field blast load[J]. Journal of Vibration and Shock, 2020, 39(21): 250-257

参考文献

[1] 胡志坚, 胡钊芳. 桥梁结构爆炸荷载特性研究[C]//中国土木工程学会桥梁结构分会. 第十九届全国桥梁学术会议论文集. 北京：人民交通出版社，2010: 771-776.
HU Zhi-jian, HU Zhao-fang. Study of blast loading characteristics for bridge structures[C]. Proceeding of 19th national bridge symposium, Beijing: People’s Communication Press, 2010: 771-776.
[2] 胡志坚, 唐杏红, 方建桥. 近场爆炸时混凝土桥梁压力场与响应分析[J]. 中国公路学报,2014,29(5): 141-147, 157.
HU Zhi-jian, TANG Xing-hong, FANG Jian-qiao. Analysis of pressure field and response for concrete bridges under close blast loading[J]. China Journal of Highway, 2014, 29(5): 141-147,157.
[3] 崔满. 爆炸荷载作用下钢筋混凝土梁的试验研究[D]. 上海: 同济大学, 2007.
CUI Man. Experimental Research of Reinforced Concrete Beam Under the Explosive Load[D]. Shanghai: Tongji University, 2007.
[4] ZHANG D, YAO S J, LU F, et al. Experimental study on scaling of RC beams under close-in blast loading[J]. Engineering Failure Analysis, 2013, 33(5): 497-504.
[5] 高超, 宗周红, 伍俊. 爆炸荷载下钢筋混凝土框架结构倒塌破坏试验研究[J]. 土木工程学报, 2013, 46(7): 9-20.
GAO Chao, ZONG Zhou-hong, WU Jun. Experimental study on progressive collapse failure of RC frame structures under blast loading[J], China civil engineering journal, 2013, 46(7): 9-20.
[6] 宗周红, 唐彪, 高超, 等. 钢筋混凝土墩柱抗爆性能试验[J]. 中国公路学报, 2017, 30(9): 51-60.
ZONG Zhou-hong, TANG Biao, GAO Chao, et al. Experiment on Blast-resistance Performance of Reinforced Concrete Piers[J]. China Journal of Highway, 2017, 30(9): 51-60.
[7] COFER W F, MATTHEWS D S, MCLEAN D I. Effects of Blast Loading on Prestressed Girder Bridges[J]. Shock and Vibration, 2012, 19(1): 1-18.
[8] YUAN S, HAO H, ZONG Z, et al. A Study of RC Bridge Columns under Contact Explosion[J]. International Journal of Impact Engineering, 2017, 109.
[9] HASHEMI S K, BRADFORD M A, VALIPOUR H R. Dynamic response and performance of cable-stayed bridges under blast load: Effects of pylon geometry[J]. Engineering Structures, 2017, 137: 50-66.
[10] ISLAM A K M A, YAZDANI N. Performance of AASHTO girder bridges under blast loading[J]. Engineering Structures, 2008, 30(7): 1922-1937.
[11] PAN Y, VENTURA C E, CHEUNG M M S. Performance of highway bridges subjected to blast loads[J]. Engineering Structures, 2017, 151: 788-801.
[12] ZHANG CW, GHOLIPOUR G. Nonlinear dynamic behavior of simply-supported RC beams subjected to combined impact-blast loading[J]. Engineering Structures, 2019, 181: 124-142.
[13] DENG R B, JIN X l. Numerical Simulation of Bridge Damage under Blast Loads[J]. Wseas Transactions on Computers, 2009, 8(9): 1564-1574.
[14] TANG E K C, HAO H. Numerical simulation of a cable-stayed bridge response to blast loads, Part I: Model development and response calculations[J]. Engineering Structures, 2010, 32(10): 3180-3192.
[15] HAO H, TANG E K C. Numerical simulation of a cable-stayed bridge response to blast loads, Part II: Damage prediction and FRP strengthening[J]. Engineering Structures, 2010, 32(10): 3193-3205.
[16] JIN S, LEE H J. Performance of cable-stayed bridge pylons subjected to blast loading[J]. Engineering Structures, 2011, 33(4): 1133-1148.
[17] 亨利奇. 爆炸动力学及其应用[M]. 科学出版社, 1987.
HENRYCH J. The Dynamics of Explosion and Its Use[M]. Beijing: Science Press, 1987.
[ 8] 王芳, 冯顺山, 俞为民. 爆炸冲击波作用下靶板的塑性大变形响应研究[J]. 中国安全科学学报, 2003, 13(3): 58.
WANG Fang, FENG Shun-shan, YU Wei-min. Study on Large Plastic Deformation Response of Target Plate under Explosive Blast Wave[J]. China Safety Science Journal, 2003, 13(3): 58.
[19] HAJEK R, FLADR J, PACHMAN J, et al. An experimental evaluation of the blast resistance of heterogeneous concrete-based composite bridge decks[J]. Engineering Structures, 2019, 179: 204-210.
[20] 孙珊珊. 爆炸荷载下钢管混凝土柱抗爆性能研究[D]. 陕西: 长安大学, 2013.
SUN Shan-shan. Investigation on Dynamic Response of CFST Columns Subjected to Blast Loading[D]. Shanxi: Chang’an University, 2013.
[21] 魏雪英, 白国良. 爆炸荷载下钢筋混凝土柱的动力响应及破坏形态分析[J]. 解放军理工大学学报(自然科学版), 2007(5): 525-529.
WEI Xue-ying, BAI Guo-liang. Dynamic response and failure modes of RC column under blast load[J]. Journal of PLA University of Science and Technology, 2007(5): 525-529.