20170221空心钢管混凝土柱滞回性能数值模拟.docxVIP

ABSTRACT 摘 要 PAGE \* MERGEFORMAT42 PAGE \* MERGEFORMAT41 摘 要 本文通过数值模拟与参数分析主要研究圆形和方形两种截面形式的空心钢管混凝土柱在较高轴压比情况下抗震性能。建立了空心钢管混凝土柱的分布塑性纤维模型和三维塑性有限元模型，对比验证了纤维模型法计算结果、有限元法计算结果及试验结果，结果表明了本文建立的空心钢管混凝土数值力学模型的正确性。通过数值计算分析轴压比、空心率、长细比、混凝土强度、含钢率、钢材强度及截面形式对空心钢管混凝土柱骨架曲线的影响，为确定空心钢管混凝土结构抗震设计方法提供理论依据，供实际工程设计和分析参考。 关键词 空心钢管混凝土；滞回性能；数值模拟；参数分析 ABSTRACT This paper mainly studied the seismic behavior of H-CFST by numerical simulation and parameters anaylsis, which involves circular and quadrate cross sections, under higher axial compression ratio. The numerical models(distributed plastic fiber model and three-dimensional plastic finite element model) of H-CFST frame column were builded and the numerical calculation were in good agreement with test results. The influences of axial compression ratio, hollow ratio, slenderness ratio, concrete strength, steel ratio, steel strength and section form to the skeleton curves of H-CFST were studied by numerical calculation, which will provide theoretical foundations for seismic design of hollow-concrete-filled steel tubular structures as well as reference for design and analysis of practical engineering. KEY WORDS hollow concrete-filled steel tube; hysteresis behavior; numerical simulation; parameters anaylsis 目 录 目 录  TOC \o 1-3 \h \z \u  HYPERLINK \l _Toc326227825 1 绪 论  PAGEREF _Toc326227825 \h 1  HYPERLINK \l _Toc326227826 1.1 课题的研究背景、意义与目的  PAGEREF _Toc326227826 \h 1  HYPERLINK \l _Toc326227827 1.2 空心钢管混凝土研究现状  PAGEREF _Toc326227827 \h 3  HYPERLINK \l _Toc326227828 1.2.1 国内研究现状  PAGEREF _Toc326227828 \h 3  HYPERLINK \l _Toc326227829 1.2.2 国外研究现状  PAGEREF _Toc326227829 \h 10  HYPERLINK \l _Toc326227830 1.3 课题研究思路及主要研究内容  PAGEREF _Toc326227830 \h 11  HYPERLINK \l _Toc326227831 2 空心钢管混凝土柱滞回性能数值模型建立及验证  PAGEREF _Toc326227831 \h 13  HYPERLINK \l _Toc326227832 2.1 引言  PAGEREF _Toc326227832 \h 13  HYPERLINK \l _Toc326227833 2.2 空心钢管混凝土核心混凝土应力-应变关系曲线  PAGEREF _Toc326227833 \h