| 钢管微膨胀混凝土轴压短柱长期变形研究 |
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| 引用本文： | 王玉银,耿悦,张素梅.钢管微膨胀混凝土轴压短柱长期变形研究[J].中国公路学报,2011(6). |
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| 作者姓名： | 王玉银 耿悦 张素梅 |
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| 作者单位： | 哈尔滨工业大学土木工程学院;悉尼大学土木工程学院; |
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| 基金项目： | 国家自然科学基金项目(50608023); “十一五”国家科技支撑计划项目(2006BAJ01B02-02) |
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| 摘 要： | 针对钢管混凝土拱桥中普遍采用的钢管微膨胀高性能混凝土,考虑轴压比、加载龄期等因素的影响,进行了圆钢管微膨胀混凝土轴心受压短柱的长期变形试验研究。采用逐步积分法,将5种不同混凝土收缩、徐变模型进行适当修正,应用于钢管微膨胀混凝土轴心受压短柱的长期变形分析,并将分析结果与试验结果进行对比。分析了含钢率、加载龄期、持荷时间、混凝土强度等因素对钢管微膨胀混凝土构件长期静力性能的影响。研究结果表明:修正后的EC2,MC90及AFREM模型在分析加载龄期不超过28d的钢管微膨胀混凝土构件在轴向荷载作用下的长期变形性能时具有较高的精度;核心混凝土时效作用对钢管微膨胀混凝土构件长期静力响应的影响显著。
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| 关 键 词： | 桥梁工程 钢管混凝土 逐步积分法 徐变 微膨胀混凝土 加载龄期 |
Research on Long-term Deformation of Concrete-filled Steel Tubular Stubs with Expansive Additive Under Axial Loading |
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| WANG Yu-yin,GENG Yue,ZHANG Su-mei.Research on Long-term Deformation of Concrete-filled Steel Tubular Stubs with Expansive Additive Under Axial Loading[J].China Journal of Highway and Transport,2011(6). |
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| Authors: | WANG Yu-yin GENG Yue ZHANG Su-mei |
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| Institution: | WANG Yu-yin1,GENG Yue1,2,ZHANG Su-mei1(1.School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China,2.School of Civil Engineering,The University of Sydney,Sydney 2006,New South Wales,Australia) |
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| Abstract: | Aimed at high performance concrete-filled steel tubular(CFST) with expansive additive which has been widely adopted in CFST arch bridges,considering the influence of axial compression ratio and loading age,test study of long-term deformation of circular CFST stubs with expansive additive under axial loading was carried out.Using step-by-step integration method,5 different concrete models of shrinkage and creep were modified,then modified models were applied to long-term deformation analysis of CFST stubs wi... |
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| Keywords: | bridge engineering CFST step-by-step integration method creep concrete with expansive additive loading age |
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