铝合金甲虫板-杆组合网壳的力学性能研究  

Study on mechanical properties of aluminum alloy beetle plate-bar single-layer reticulated shell

作　　者：袁良健 郑腾腾 赵才其 杨朔 徐云 YUAN Liangjian;ZHENG Tengteng;ZHAO Caiqi;YANG Shuo;XU Yun(Southeast University Liyang Innovation Center for Infrastructure Security and Smart Technology,Liyang 213330,China;School of Civil Engineering,Southeast University,Nanjing 210096,China;Yancheng Chengtou Municipal Construction Group Co.,Ltd.,Yancheng 224003,China)

机构地区：[1]东南大学溧阳基础设施安全与智慧技术创新中心,溧阳213330 [2]东南大学土木工程学院,南京210096 [3]盐城城投市政建设集团有限公司,盐城224003

出　　处：《建筑结构》2022年第S02期566-570,共5页Building Structure

基　　金：国家自然科学基金项目(6505000192)

摘　　要：为了提高铝合金单层网壳结构的整体刚度和稳定承载力,将具有高比强度和比刚度的新型甲虫板与铝合金单层网壳可靠连接,形成一种新型铝合金甲虫板-杆组合网壳结构,并且对比分析了甲虫板-杆组合网壳、蜂窝板-杆组合网壳和无板单层网壳的静力性能以及稳定性能。结果表明:在竖向荷载下,甲虫板-杆组合网壳的竖向位移最小,为蜂窝板-杆组合网壳的85%,无板单层网壳的6.13%。甲虫板-杆组合网壳杆件的最大轴力在三种网壳中最小,仅为无板单层网壳的25%,蜂窝板-杆组合网壳的94%。三种网壳的特征值屈曲分析结果表明,组合网壳的临界荷载约为无板单层网壳的30倍。初始几何缺陷对甲虫板-杆组合网壳的稳定性非常敏感,在1/400的初始缺陷下,其稳定承载力下降约28%。In order to improve the overall stiffness and stable bearing capacity of the aluminum alloy single-layer reticulated shell structure, the new type of beetle plate with high specific strength and specific stiffness was reliably connected with the aluminum alloy single-layer reticulated shell to form a new type of aluminum alloy beetle plate-rod composite reticulated shell structure. The static and stability properties of the beetle plate-rod composite reticulated shell,the aluminum alloy honeycomb plate-rod composite reticulated shell and the plateless single-layer reticulated shell were analyzed. The results show that the vertical displacement of the beetle plate-rod composite reticulated shell is the smallest under vertical load, which is 85% of the honeycomb plate-rod composite reticulated shell and 6.13% of the plateless single-layer reticulated shell. The maximum axial force of the beetle plate-rod composite reticulated shell is the smallest among the three reticulated shells, which is only 25% of the plateless single-layer reticulated shell and 94% of the honeycomb plate-rod composite reticulated shell. The eigenvalue buckling analysis results of the three reticulated shells show that the critical load of the composite reticulated shell is about 30 times that of the plateless single-layer reticulated shell. The initial geometric imperfection is very sensitive to the stability of the composite reticulated shell, and the stability bearing capacity decreases by about 28% at the initial imperfection of 1/400.

关 键 词：甲虫板 铝合金组合网壳 稳定性能 初始几何缺陷 

分 类 号：TU399[建筑科学—结构工程]