| 周旺保,蒋丽忠,余志武.钢-混凝土组合箱梁梁段有限元法研究[J].计算力学学报,2013,30(2):255~260,274 |
|
| 
码上扫一扫！ |
| 钢-混凝土组合箱梁梁段有限元法研究 |
| The finite segment method study of steel-concrete composite box beams |
| 投稿时间：2012-02-15 修订日期：2012-09-16 |
| DOI：10.7511/jslx201302014 |
| 中文关键词: 钢-混凝土组合箱梁 剪力滞效应 剪切变形 滑移 有限梁段法 |
| 英文关键词:steel-concrete composite box beam shear lag effect shear deformation slip finite segment method |
| 基金项目:国家自然科学基金(51078355,50938008);教育部博士研究生学术新人奖;湖南省博士生科研创新(CX2011B093);中央高校基本科研业务费专项基金(20117Q008);中南大学优秀博士生奖励助学金(2011ybjz031)资助项目. |
|
| 摘要点击次数: 2936 |
| 全文下载次数: 1640 |
| 中文摘要: |
| 组合梁界面滑移将减小组合梁刚度,增大变形,影响构件性能;剪应力沿截面横向分布不均匀,造成其弯曲正应力的横向分布呈曲线形状,即剪力滞效应;同时组合梁往往重载,具有较小的跨高比,剪切变形不可忽略。根据虚功原理,建立了同时考虑滑移效应、剪力滞及剪切变形效应的组合梁单元刚度矩阵及等效节点力向量,并在此基础上编制了组合梁梁段有限元程序。利用本文程序对现有组合梁试件的混凝土顶板应力、钢梁底板应力、跨中挠度和梁端滑移进行了计算,并将本文计算结果与解析法计算结果及试验结果进行了比较。结果表明,本文计算结果与解析法计算结果及试验结果吻合良好;同时,本文计算结果具有较好的稳定性,验证了本文计算方法的正确性。本文所建立的梁单元刚度矩阵同时考虑了剪切变形、剪力滞及滑移效应的影响,符合工程实际,为有限梁段法分析组合箱梁提供了理论基础。 |
| 英文摘要: |
| The interface slip of composite beam would reduce the stiffness and increase the deformation,which affects the component performance.The transverse distribution of the bending normal stress presents curve shape because of uneven transverse distribution of shear stress,i.e.shear lag effect.Because the composite beam with small span-depth ratio is often overloaded,the shear deformation cannot be ignored.According to the virtual work principle,the unit stiffness matrix and equivalent nodal force vector of the composite beam were established in consideration of the slip effect,shear lag effect and shear deformation.On the basis of the unit stiffness matrix mentioned in this paper,the Finite Segment Method program of composite box beam was performed.The stress of concrete roof and steel beam floor,mid-span deflection and slip of beam-end were calculated based on this program.And the calculated results were compared with calculating results of analytic-method and experimental results.The results show that the calculating results in this paper are in good agreement with the experimental results and the results of analytical-method,and it has good stability.The correctness of the calculation in this paper is verified.The unit stiffness matrix considering the influence of shear deformation,shear lag and slip accords with engineering practice,which provides a theoretical basis for using finite beam segment method to further study of the composite box beams. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
