| 不同边界下钢-混凝土组合球面肋壳性能分析 |
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| 引用本文： | 常玉珍,王玲玲,李晓莉.不同边界下钢-混凝土组合球面肋壳性能分析[J].空间结构,2011,17(3). |
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| 作者姓名： | 常玉珍 王玲玲 李晓莉 |
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| 作者单位： | 西安建筑科技大学土木学院,陕西西安,710055 |
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| 基金项目： | 陕西省青年基金(2011JQ7014); 西安建筑科技大学青年基金(QN0801);西安建筑科技大学人才基金(RC0801) |
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| 摘 要： | 钢-混凝土组合肋壳是一种新型大跨度空间结构,边界约束对结构的极限承载力和稳定性具有很大影响.基于非线性有限元理论,建立了考虑几何非线性和物理非线性的数值计算模型,以40m跨、三种不同截面尺寸、不同矢高下的钢-混凝土组合肋壳为例,分析了包括周边固定、周边铰支、点固定和点铰支在内的四种边界约束对结构极限承载力和结构破坏形态的影响.结果表明,截面尺寸和矢高相同时,边界约束越接近刚性,极限承载力越大；随着截面尺寸增大,不同边界约束下承载力比值增大,但随矢高增大,反而减低；不同边界条件对结构失稳形态影响很小,结构均为极值点失稳,荷载-位移曲线的走势大致相同；随着组合肋截面尺寸增大,组合肋壳在不同约束条件下均表现出越来越高的屈曲后强度.
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| 关 键 词： | 组合肋壳 边界条件 非线性稳定 极限承载力 |
Analysis of steel-concrete composite ribbed spherical shell under different boundary conditions |
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| CHANG Yu-zhen
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WANG Ling-ling
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LI Xiao-li.Analysis of steel-concrete composite ribbed spherical shell under different boundary conditions[J].Spatial Structures,2011,17(3). |
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| Authors: | CHANG Yu-zhen WANG Ling-ling LI Xiao-li |
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| Affiliation: | CHANG Yu-zhen,WANG Ling-ling,LI Xiao-li(School of Civil Engineering,Xi'an University of Architecture & Technology,Xi'an 710055,China) |
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| Abstract: | The steel-concrete composite ribbed shell is a new type of spatial structure.Different boundary conditions have a considerably influence on the behavior of the structure.Based on the nonlinear finite element,a numerical model is made by finite element analysis software ANSYS,in which material and geometrical nonlinear is considered.Taking a structure with 40m span,three different section dimensions and two different span heights as an example,4 different boundary conditions are considered,including fixed an... |
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| Keywords: | steel-concrete composite ribbed shell restrained boundary condition nonlinear stability ultimate bearing capacity |
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