带钢环支承的卸荷型结构试验研究  

Experimental investigation on unloading structures with steel-ring supports

作　　者：张伟锋[1,2] 王永辉[2] 任王军[2] 曹兰付[2] 李阅迟[2] 

机构地区：[1]解放军理工大学国防工程学院,江苏南京210007 [2]总参工程兵科研三所,河南洛阳471023

出　　处：《防护工程》2014年第2期11-15,共5页Protective Engineering

摘　　要：设计了一种构件内部带钢环支承的浅埋条件下使用的卸荷结构。爆炸荷载作用下，该结构可通过钢环的大变形吸收能量，从而大幅度提高结构抗力。对卸荷结构和常规结构在覆土1．5m情况下，采用21kg TNT集团炸药分别进行顶爆和侧爆抗力试验。试验结果显示：在TNT爆炸荷载作用下，变形结构和沉降支座反应迅速；与常规结构相比，卸荷结构爆心下方界面压力和材料应变均减小60％以上，其承载能力相应提高。A shallow-buried unloading structure with steel-ring supports has been designed. The resistance is im-proved through large deformation of steel rings when subjected to explosive loading. A normal structure was de-signed for comparing with the unloading structure. 21kg TNT charges were detonated respectively on the top and side of the unloading and normal structures with 1.5m backfill. The results demonstrated that the deformable ele-ments and settleable supports responded effectively subjected to TNT explosive loadings. Compared with the normal structure,the pressures and strains under the detonation center reduced by more than 60%, and the carrying capac-ity was improved accordingly.

关 键 词：防护工程 弹性支承 浅埋结构 土与结构相互作用 

分 类 号：TU317[建筑科学—结构工程]