内配圆钢管的圆钢管混凝土构件耐撞性能分析

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (9) : 123-132.

论文

史艳莉1,2，何佳星2，王文达2，鲜威2，王蕊3

作者信息 +

Anti-impact performance analysis for circular CFST members with inner circular steel tube

SHI Yanli1,2， HE Jiaxing2， WANG Wenda2， XIAN Wei2， WANG Rui3

Author information +

文章历史 +

摘要

内配圆钢管的圆钢管混凝土是一种新型复合形式的组合构件，由圆钢管混凝土内部配置同心位置的圆管，并在内部圆管的内外两侧均浇筑混凝土而形成的构件。基于有限元软件ABAQUS对内配圆钢管的圆钢管混凝土构件在低速横向撞击作用下的耐撞性能进行了数值模拟，数值结果与其他研究者完成的钢管混凝土、中空夹层钢管混凝土试件的撞击试验数据进行了对比，验证了模型的正确性。采用该模型分析了此类组合构件在横向撞击作用下的动力响应全过程及其典型破坏模态，对影响其耐撞性能的主要影响参数进行了分析，初步得出了各主要影响参数对此类组合构件耐撞性能的影响。参数分析结果表明,提高外钢管的强度及含钢率可以有效地改善该构件的耐撞性能，而混凝土强度的变化对构件耐撞性能的影响很小；增强构件两端的支座约束，可以增强构件的耐撞性能；构件的内外径之比为0.6～0.8时，构件具有较好的耐撞性能。

Abstract

A circular concrete-filled steel tubular (CFST) member with inner circular steel tube is a new type of composite member, and it placed a small circular steel tube into the circular CFST member concentrically. The concrete was filled into the inner tube as well as the gap between the inner and the outer steel tube. A finite element analysis (FEA) model was developed using ABAQUS to investigate the dynamic responses of the circular CFST member with inner circular steel tube under low velocity transverse impact. The FEA model was verified by the other researchers’ experimental results of CFST members and concrete-filled double skin tubular (CFDST) members, respectively. The FEA model was used to analyze the whole process of dynamic response and the typical failure modes of a circular CFST member with inner circular steel tube under transverse impacting load. The parameters influencing the impact resistance were analyzed. Parameter analysis results show that incremental yielding strength and steel ratio of the outer steel tube can improve the anti-impact performance of this type of composite members effectively while the concrete strength has a little effect on the performance. The strengthened restraints at both ends of the composite members can also improve the impact resistance of this type of members. The composite member will exhibit a relative preferable performance if the diameter ratio of the inner to outer tube of the member is a range from 0.6 to 0.8.

导出引用

史艳莉1,2，何佳星2，王文达2，鲜威2，王蕊3. 内配圆钢管的圆钢管混凝土构件耐撞性能分析[J]. 振动与冲击, 2019, 38(9): 123-132

SHI Yanli1,2， HE Jiaxing2， WANG Wenda2， XIAN Wei2， WANG Rui3. Anti-impact performance analysis for circular CFST members with inner circular steel tube[J]. Journal of Vibration and Shock, 2019, 38(9): 123-132

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