摘要
为研究矩形钢管混凝土翼缘蜂窝双腹板H型组合短柱的轴压性能,以长细比、约束效应系数、钢管屈服强度、混凝土强度、孔高比及距高比等为控制参数,共设计了19根足尺试件。基于简化的钢材本构模型与考虑约束的混凝土非线性本构模型,利用ABAQUS有限元软件对12根矩形钢管混凝土翼缘的H型蜂窝组合柱进行数值模拟分析,并得到试件的荷载-位移曲线。通过与现有试验数据的比对,验证了所采用材料本构模型和有限元建模的适用性及准确性,并进一步对组合短柱进行了参数分析,探讨了不同参数变化对该类新型短柱轴压承载力的影响规律,揭示了该类构件的受力过程、破坏模式以及受力机理。结果表明:矩形钢管混凝土翼缘蜂窝双腹板H型组合短柱的承载力随着约束效应系数、钢管屈服强度、混凝土强度和距高比的增加明显提高,随着长细比和孔高比的增加而降低。所有试件均表现出相似的失效模式,翼缘向外隆起并呈现出外凸的破坏形态,蜂窝钢腹板沿着腹板所在平面向圆孔两侧发展。最后,采用1stOpt软件进行回归分析,得到该类组合短柱的轴压承载力计算公式,为其在实际工程中的应用提供理论依据。
To study the axial compression performance of H-shaped composite short columns with concrete-filled rectangular steel tubular flanges and double cellular webs,19 full-scale specimens were designed with control parameters including slenderness ratio,confinement effect coefficient,steel yield strength,concrete axial compressive strength,hole-height ratio,and spacing-height ratio.Based on simplified steel constitutive models and constrained concrete nonlinear constitutive models,numerical simulations of 12 H-shaped cellular composite columns with concrete-filled rectangular steel tubular flanges were conducted using ABAQUS finite element software to obtain load-displacement curves of specimens.Through comparison with existing experimental data,the applicability and accuracy of the adop-ted material constitutive models and finite element modeling results were verified.Further parametric analyses were performed to investigate the influence of different parameter variations on the axial bearing capacity of this new type of short columns,thereby revealing the mechanical processes,failure modes,and load-bearing mechanisms.The results indicated that the bearing capacity significantly increased with the confinement effect coefficient,steel yield strength,concrete axial compressive strength,and spacing-height ratio but decreased with the slenderness ratio and hole-height ratio.All specimens exhi-bited similar failure patterns:outward bulging of flanges with convex failure morphology,and cellular steel webs developing cracks extending bilaterally along the web plane from circular holes.Finally,statistical regression analysis based on the 1stOpt software was conducted to establish a bearing capacity formula for this composite short column type,providing theoretical basis for practical engineering applications.
作者
计静
车伟忠
姜良芹
刘迎春
张展彬
储烜
JI Jing;CHE Weizhong;JIANG Liangqin;LIU Yingchun;ZHANG Zhanbin;CHU Xuan(Faculty of Civil Engineering and Architecture,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Key Laboratory of Structural Catastrophe and Control,Ministry of Education,Harbin Institute of Technology,Harbin,Heilongjiang 150090,China;Key Laboratory of New Energy Heat Utilization and Disaster Prevention and Reduction in Cold Regions of Heilongjiang Province,Northeast Petroleum University,Daqing,Heilongjiang 163318,China)
出处
《河北工程大学学报(自然科学版)》
2025年第2期1-11,共11页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金面上项目(52478157)
黑龙江省自然科学基金联合引导项目(LH2024E014)
黑龙江省高校优势科研方向凝练基金资助项目(2024YSKYFX-04)
黑龙江省科技创新基地奖励项目(GY2024JD0005)。
关键词
蜂窝双腹板
钢管混凝土
组合柱
受力机理
轴压性能
honeycomb double-web plate
concrete-filled steel tube
composite columns
mechanism of force
axial compression performance
