| 钢-混凝土混合结构体系屈曲模态判别标准及临界荷载简化算法 |
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| 引用本文： | 李亮,;李国强. 钢-混凝土混合结构体系屈曲模态判别标准及临界荷载简化算法[J]. 长安大学学报(建筑与环境科学版), 2014, 0(4): 67-73 |
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| 作者姓名： | 李亮, 李国强 |
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| 作者单位： | [1]长安大学建筑工程学院,陕西西安710061; [2]同济大学土木工程防灾国家重点实验室,上海200092 |
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| 基金项目： | 国家自然科学基金项目（51208057）;中国博士后科学基金项目（2013T60687）;中央高校基本科研业务费专项资金项目（0009310828140114） |
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| 摘 要： | 为了研究核心筒支撑作用对屈曲模态和屈曲临界荷载的影响，建立了钢‐混凝土混合结构体系简化力学模型，并在大量有限元分析的基础上，研究了钢‐混凝土混合结构体系中框架和支撑两部分之间的相对强弱关系对屈曲模态的影响。根据屈曲模态不同，将钢‐混凝土混合结构体系划分为4种类型，归纳出可靠的屈曲模态判别标准，并提出了与各类屈曲模态对应的临界荷载简化算法。研究结果表明：该简化算法计算结果准确、可靠，可供设计人员采用。
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| 关 键 词： | 钢-混凝土混合结构体系 支撑作用 屈曲临界荷载 简化力学模型 有限元分析 |
Judgment Standard of Buckling Mode and Simplified Algorithm of Critical Load for Steel-concrete Mixed Structure System |
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| Affiliation: | LI Liang, LI Guo-qiang (1. School of Civil Engineering, Chang＇an University, Xi＇an 710061, Shaanxi, China; 2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China) |
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| Abstract: | In order to investigate the influence of the lateral resistance by the core tube on buckling mode and critical buckling load ,the simplified mechanical model of the steel‐concrete mixed structure system w as established .Based on the finite element analysis ,the influence of the relative relations of the frame and tube for steel‐concrete mixed structure system on buckling mode were studied .According to the different buckling modes ,the steel‐concrete mixed structure system was categorized into four types ,and the reliable judgment standard of buckling mode was summarized .Furthermore , the simplified algorithms of critical load corresponding to various buckling modes were put forward . The study results show that the calculation results of the simplified algorithm are accurate and reliable ,can provide references for the designer . |
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| Keywords: | steel-concrete mixed structure system lateral resistance critical buckling load sim-plified mechanical model finite element analysis |
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