外包钢板-混凝土组合连梁非线性有限元分析:传力与变形机理研究

发布时间：2018-01-15 23:13

  本文关键词：外包钢板-混凝土组合连梁非线性有限元分析:传力与变形机理研究　出处：《建筑结构学报》2014年08期 　论文类型：期刊论文

  更多相关文章： 外包钢板-混凝土组合连梁 钢管混凝土 有限元分析 斜压杆 弯曲变形 剪切变形

【摘要】：在外包钢板-混凝土组合连梁试验研究的基础上,对组合连梁试件和不同参数取值的补充模型进行了非线性有限元分析。有限元分析得到的滞回曲线与试验曲线吻合良好,能较好地模拟组合连梁的受力行为。通过应力分析,发现内填混凝土的工作机制类似于斜压杆,其压力沿着连梁对角线方向从一端的受压侧传递到另一端的受压侧。外包钢板承担的剪力比例和弯矩比例的范围分别为0.36~0.76和0.57~0.82;混凝土的剪力与轴压力之比和连梁的高跨比近似相等。连梁的侧向位移由节点区变形引起的梁端转角、连梁的弯曲变形与剪切变形产生;在常用的跨高比范围内,剪切变形产生的侧向位移在总位移中占有较大比例,且受跨高比的影响很大。
[Abstract]:On the basis of experimental study of steel plate and concrete composite connecting beam. The nonlinear finite element analysis is carried out on the combined beam specimen and the supplementary model with different parameters. The hysteretic curve obtained by the finite element analysis is in good agreement with the experimental curve. Through the stress analysis, it is found that the working mechanism of the inner filled concrete is similar to that of the oblique compression bar. The pressure is transmitted from the compression side at one end to the compression side at the other end along the diagonal direction of the connecting beam. The shear ratio and the bending moment ratio of the outer steel plate are 0.36 / 0.76 and 0.57 / 0.8, respectively. 2; The ratio of shear force to axial pressure of concrete is approximately equal to the ratio of height to span of the connecting beam. The lateral displacement of the connecting beam is caused by the corner angle of the beam caused by the deformation of the joint zone and the bending and shearing deformation of the connecting beam. In the common span height ratio range, the lateral displacement caused by shear deformation occupies a large proportion of the total displacement, and is greatly affected by the span height ratio.
【作者单位】： 清华大学土木工程系;清华大学土木工程安全与耐久教育部重点实验室;
【基金】：国家科技支撑计划项目(2011BAJ09B01) 国家自然科学基金项目(51178246) 清华大学自主科研计划项目(2012Z06117)
【分类号】：TU398.2
【正文快照】： 0引言外包钢板-混凝土组合剪力墙[1](亦称作“双钢板-混凝土组合剪力墙”)由于在高轴压比下仍具有较好的变形和耗能能力,因此适合在超高层建筑的核心筒中使用。外包钢板还可作为混凝土浇筑的模板,并且在使用阶段可防止混凝土裂缝外露。文献[2-5]对外包钢板-混凝土组合剪力墙进，

本文编号：1430496