铝合金网壳结构盘式节点受力性能有限元分析

发布时间：2018-04-11 04:39

本文选题：铝合金盘式节点 + 破坏模式　；参考：《天津大学学报(自然科学与工程技术版)》2015年S1期

【摘要】：本文以铝合金盘式节点试件受跨中集中荷载作用的静力加载试验数据为基础,利用ABAQUS对3种不同尺寸的铝合金盘式节点进行了非线性有限元数值分析,并对盘式节点与刚性节点的受力性能进行了对比.分析表明:节点受跨中集中荷载作用时,作用在节点盘上的力通过螺栓群的作用传递给杆件,试件对向工字型杆件上、下翼缘最后排螺栓孔处及与之相接的腹板底部先形成塑性区,杆件下翼缘螺栓孔处由于开孔削弱截面,发生显著塑性变形而被拉断,节点破坏模式与实际试验破坏模式相同;节点强度达理想刚性节点的80.68%~86.42%,刚度达理想刚性节点的60.10%~67.73%,应力分布相似.基于上述静力试验和有限元分析结果,铝合金盘式节点在工程设计和计算中可作为半刚性节点,具有足够的工程强度和刚度.
[Abstract]:Based on the static loading test data of aluminum alloy disc joints subjected to concentrated load in span, the nonlinear finite element numerical analysis of three aluminum alloy disc joints with different sizes is carried out by using ABAQUS.The mechanical behavior of disc joints and rigid joints is compared.The analysis shows that when the joint is subjected to the concentrated load in the span, the force acting on the joint plate is transferred to the bar through the action of the bolt group, and the specimen faces to the I-shaped member.The plastic zone is formed at the bottom of the last row bolt hole of the lower flange and the bottom of the web plate connected with it. The bolt hole of the lower flange of the member is broken due to the weakening section of the opening hole and the obvious plastic deformation. The failure mode of the joint is the same as that of the actual test.The strength of the joints is 80.68 and 86.42, and the stiffness of the joints is 60.107.73.The stress distribution is similar.Based on the results of static test and finite element analysis, aluminum alloy disc joints can be used as semi-rigid joints in engineering design and calculation, and have sufficient engineering strength and stiffness.
【作者单位】：清华大学土木工程安全与耐久教育部重点实验室;上海通正铝业工程技术有限公司;
【基金】：高等学校博士学科点专项科研基金(优先发展领域)资助项目(20110002130002)
【分类号】：TU399

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