地下结构抗爆炸地冲击性能静载试验研究  

Static loading test research on blast resistance performance of underground structures under ground shock

作　　者：宝鑫[1] 刘文涛[1] 李述涛 陈龙明 王栋[1] BAO Xin;LIU Wentao;LI Shutao;CHEN Longmin;WANG Dong(Tsinghua University,Beijing 100084,China;Defense Engineering Institute,AMS,PLA,Beijing 100036,China)

机构地区：[1]清华大学,北京100084 [2]军事科学院国防工程研究院,北京100036

出　　处：《防护工程》2023年第5期1-8,共8页Protective Engineering

摘　　要：近期研究证明,静力加载可以反映地冲击荷载作用下地下结构的整体弯曲变形和局部破坏状态,为采用等效静力试验方法获取结构抗爆性能相关参数提供新的思路。针对某深埋于围岩介质中的直墙圆拱结构,设计了3∶10几何缩比的试验模型,开展了围岩介质中深埋地下结构抗爆炸地冲击性能静载试验,以结构圆拱挠度为抗爆性能指标,记录并分析了地下结构的变形、受力和破坏状态。试验结果表明,静力加载作用下,深埋地下结构呈现与动力爆炸荷载下相同的拱顶塌陷、墙体剥离的整体受压破坏模式。结构拱顶在荷载达到800 kN时出现混凝土开裂,超过1200 kN后钢筋开始屈服、断裂;结构模型的峰值承载力为1600 kN,超过此荷载,结构发生严重破坏。Recent studies have demonstrated that static loading can reflect the overall bending deformation and local damage state of underground structures under the influence of ground shock loads,providing a new approach for obtaining structural blast resistance-related parameters using equivalent static loading test methods.In the case of a deeply buried circular arch structure within surrounding rock media,a 3∶10 geometrically scaled test model was designed.Static loading tests were conducted to assess the blast resistance performance of the underground structure in the surrounding rock media,with the structural arch deflection as the blast resistance performance indicator.The deformation,stress,and damage state of the underground structure were recorded and analyzed.The test results indicate that under static loading,the deeply buried underground structure exhibits an overall compressive failure mode similar to that under dynamic blast loads,including arch crown collapse and wall detachment.The structural arch crown showed concrete cracking when the load reached 800 kN,and reinforcement yielded and fractured after exceeding 1200 kN.The peak bearing capacity of the structural model was 1600 kN,and beyond this load,the structure experienced severe damage.

关 键 词：地下结构 爆炸地冲击 静载试验 性能指标 

分 类 号：TU93[建筑科学—结构工程] TU352.13[军事—军事工程] E95