方形中空夹层钢管超高性能钢纤维混凝土柱抗爆性能数值模拟与实验验证

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摘要建立了爆炸荷载作用下方形中空夹层钢管超高性能钢纤维混凝土（Ultra-High Performance Steel Fiber Reinforced Concrete Filled Double Skin Steel Tube, UHPSFRCFDST）柱动态响应及其损伤破坏三维有限元数值模型。首先通过模拟结果与爆炸破坏试验结果的对比分析，验证了数值模型和计算方法的有效性。进而运用参数化分析方法，研究了空心率、含钢率、内、外层钢管厚度及其强度等关键参数对UHPSFRCFDST柱抗爆性能的影响。研究结果表明，UHPSFRCFDST柱具有优越的抗爆性能，所建立的三维有限元模型能够有效地分析UHPSFRCFDST柱在爆炸荷载作用下的动态响应及其损伤破坏；在一定范围内减小空心率及提高外层钢管强度可有效提升UHPSFRCFDST柱抗爆性能; 提高含钢率、减小内、外层钢管高厚比均能够显著提升UHPSFRCDST柱抗爆性能；内层钢管强度对UHPSFRCFDST柱的抗爆性能影响并不明显。

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	徐慎春1
	刘中宪2
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	吴成清2
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关键词 ：中空夹层钢管超高性能钢纤维混凝土柱, 爆炸荷载, 动态响应, 破坏模式, 有限元模型

Abstract：A 3D FE model was developed to analyze dynamic response and damage mechanism of a UHPSFRCFDST（Ultra-High Performance Steel Fiber Reinforced Concrete Filled Double Skin Steel Tube）column under blast loading, they were validated through comparison of simulated results and blast testing ones of the UHPSFRCFDST column. The effects of main variables including hollow ratios, steel ratios, and thicknesses and strengths of inner steel tube and outer steel one on the blast resistant performance of the UHPSFRCFDST column were investigated by utilizing the 3D FE model. The results indicated that the UHPSFRCFDST column has excellent antiblast performances, and the proposed 3D FEM model can be used to analyze the dynamic response of the UHPSFRCFDST column under blast loading efficiently; reducing hollow ratio and increasing strength of outer steel tube in certain ranges can enhance effectively the blast resistant performance of the UHPSFRCFDST column; increasing steel ratio and reducing height to thickness ratios of inner and outer steel tubes can significantly improve the blast resistant performance of the UHPSFRCFDST column; the strength of inner steel tube has a little effect on the blast resistant performance of the UHPSFRCFDST column, but increasing the strength of outer steel tube in a certain range can improve the blast resistant performance of the UHPSFRCFDST column significantly.

Key words： ultra-high performance steel fiber reinforced concrete filled double skin steel tube colums blast loading dynamic response damage model finite element method model

收稿日期: 2015-09-23 出版日期: 2016-12-25

引用本文:

徐慎春1,刘中宪2,3，吴成清2,3. 方形中空夹层钢管超高性能钢纤维混凝土柱抗爆性能数值模拟与实验验证[J]. 振动与冲击, 2017, 36(1): 45-54.
XU Shenchun1, LIU Zhongxian2,3, WU Chengqing2,3. Numerical simulation and test validation for ultrahigh performance steel fiber reinforced concretefilled double skin steel tube column under blast loading. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(1): 45-54.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I1/45

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