地铁隧道钻爆法施工影响下混凝土结构损伤预测方法研究
孟 丹1,朱崇钊2
STUDY ON DAMAGE PREDICTION METHOD OF CONCRETE STRUCTURE DUE TO TUNNEL BLASTING EXCAVATION
MENG Dan1,ZHU Chong-zhao2
Based on the practice of Qingdao subway tunnel under-passing building,get the concrete structure stress distribution under the influence of blasting vibration through the finite element calculation. Take the derivation of yield approach index model that suitable for concrete material based on the two kinds of concrete failure criteria. And then get the concrete structure damage distribution and evolution process combined with yield approach index function of Ottosen and GUO-WANG failure criterion. The fundamental ground moving parameters are obtained by using inverse analysis method based on ground surface measurement data of prophase excavation. Thus realize the quantitative evaluation and control of building structure damage under the influence of different settlement and vibration quantity. As a whole, settlement impact is much greater than the blasting vibration for damage evolution in building structures.
钻爆法 / 地铁隧道 / 混凝土结构 / 爆破振动 / 损伤预测 {{custom_keyword}} /
drilling and blasting method / subway tunnel / concrete structure / blasting vibration / damage prediction {{custom_keyword}} /
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