爆炸荷载作用下单层柱面网壳的动力响应  

Dynamic response of single-layer cylindrical reticulated shells subjected to blast loading

作　　者：李艳英 李海旺[1] 孙建恒[2] 刘子苑 陈文东 LI Yan-ying;LI Hai-wang;SUN Jian-heng;LIU Zi-yuan;CHEN Wen-dong(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Urban-Rural Construction,Hebei Agricultural University,Baoding 071000,China;Logistics Department,Aerospace Systems Department,Beijing 100089,China)

机构地区：[1]太原理工大学土木工程学院,山西太原030024 [2]河北农业大学城乡建设学院,河北保定071000 [3]航天系统部后勤部,北京100089

出　　处：《空间结构》2022年第1期30-36,70,共8页Spatial Structures

基　　金：河北农业大学理工基金重点项目(LG201713);河北省科技计划重点基础研究项目(15965401D);河北省自然科学基金项目(E2018204019);住建部科技计划项目(2015-K2-028);国家自然科学基金项目(51578358)。

摘　　要：以单层柱面网壳为研究对象,分析内部中心爆炸荷载作用下结构的动力响应.利用显式动力分析程序ANSYS/LS-DYNA对跨度为30m×45m的单层柱面网壳在不同炸药当量时上部网壳的节点竖向位移和杆件塑性发展进行分析,得出3种不同的损伤模式:轻微塑性损伤、严重塑性损伤和泄爆塑性损伤.改变屋面板厚度和檩托小立柱截面面积,发现屋面板适当变薄时,檩托小立柱截面积越小时可以减轻整体结构的破坏.Taking the single-layer cylindrical reticulated shell as the research object,the dynamic response of the structure under internal center explosive loading is analyzed.Using the explicit dynamic analysis program ANSYS/LS-DYNA,the vertical displacement of the nodes of the upper reticulated shell and the plastic development of the rods were analyzed for a single-layer cylindrical reticulated shell with a span of 30 m×45 m at different explosive equivalents.Three different damage patterns are presented:minor plastic damage,severe plastic damage and explosion-venting plastic damage.The thickness of the roof panel and the cross-sectional area of the small column are changed to obtain a thinner roof.When the cross-sectional area of the small column gets smaller,the damage of the entire structure can be reduced.

关 键 词：柱面网壳 爆炸荷载 动力响应 塑性发展 

分 类 号：TU393.3[建筑科学—结构工程]