多平面轴向加载下相贯节点的有限元分析与足尺试验研究

发布时间：2018-01-30 01:34

本文关键词： 焊接相贯节点足尺试验有限元分析多平面加载　出处：《建筑结构》2017年S2期 　论文类型：期刊论文

【摘要】：太原火车南站候车厅屋盖钢结构中关键相贯节点的性能对结构整体工作性能影响至关重要。针对典型焊接相贯节点,在自行设计的空间加荷装置基础上,进行2个在多平面同时轴向加荷作用下的足尺节点静力试验和相应的非线性有限元分析。试验结果和有限元分析表明:选取的相贯节点具有良好的承载能力、设计安全可靠;在1.0倍设计荷载作用下,圆形截面支管G8在节点相贯区率先屈服,但其他杆件仍处于弹性受力阶段;在预先制定的加载制度前提下,节点中继续加荷杆件对持荷杆件的受力影响较大,持荷杆件应力出现波动现象,应力变化幅值最大约34.0%。
[Abstract]:The performance of key intersecting joints in the roof steel structure of the waiting hall of Taiyuan South Railway Station is very important to the overall performance of the structure. For the typical welded intersecting joints, based on the self-designed spatial loading device. Static test and nonlinear finite element analysis of two full-scale joints under multi-plane simultaneous axial loading are carried out. The test results and finite element analysis show that the selected intersecting joints have good bearing capacity. Safe and reliable design; Under 1.0 times design load, the circular cross section branch pipes yield first in the intersection zone of the joints, but the other members are still in the elastic stress stage. On the premise of the pre-established loading system, the stress of the bearing member is affected greatly by the continuous loading member in the node, and the stress of the bearing member fluctuates, and the amplitude of the stress change is about 34.0%.
【作者单位】：太原理工大学建筑与土木工程学院;山东电力工程咨询院有限公司;
【基金】：国家自然科学基金项目(51578357) 山西自然科学基金项目(2015011062) 山西省研究生联合培养基地人才培养项目(2016JD11) 太原理工大学校团队基金项目(2014TD043)
【分类号】：TU391
【正文快照】： 2山东电力工程咨询院有限公司,济南250013)0引言太原火车客运南站候车厅屋盖由平面投影尺寸为36m×42.8m的伞状结构单元组合而成(图1和图2),伞状单元结构由两榀变截面主桁架与X形钢柱(图2)构成,主桁架上弦贯通、下弦与X形柱刚性连接,其主、次桁架相互支撑构成稳定结构体系。主

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