本文關(guān)鍵詞： 爆炸荷載 倒塌 鋼筋混凝土框架 毀傷效應 應力時程曲線　出處：《南京理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：該文采用數(shù)值仿真模擬方法研究了爆炸荷載下鋼筋混凝土構(gòu)件及框架結(jié)構(gòu)的毀傷效應,得到了其破壞全過程和毀傷效應規(guī)律。該文的研究結(jié)果對爆炸后建筑結(jié)構(gòu)的損傷評估具有一定的參考意義。該文研究內(nèi)容及結(jié)論如下:(1)數(shù)值模擬了不同工況下混凝土柱在爆炸荷載下的毀傷效應,得到了不同炸藥當量,不同爆源距離時混凝土柱的累積損傷圖和高斯點的速度時程曲線,獲得了毀傷程度與炸藥當量、爆源距離之間的關(guān)系。(2)數(shù)值模擬了爆炸荷載作用下鋼管混凝土柱的毀傷效應,得到了不同壁厚時混凝土單元和鋼管單元的累積損傷圖和高斯點的速度時程曲線,得到了壁厚與鋼管混凝土毀傷程度的關(guān)系。(3)數(shù)值模擬了爆炸荷載作用下鋼筋混凝土框架的毀傷效應,得到了不同位置爆源時框架上高斯點的應力時程曲線圖,加速度時程曲線圖,位移時程曲線圖,得到了框架的損傷破壞過程以及爆炸沖擊波的傳播影響區(qū)域。(4)數(shù)值模擬了炸藥當量對鋼筋混凝土框架結(jié)構(gòu)在爆炸荷載下的毀傷效應的影響,得到了同一高斯點在三種不同炸藥當量下的應力時程曲線,加速度時程曲線,位移時程曲線和框架不同時刻的應力云圖,獲得了不同炸藥當量下框架的破壞過程、區(qū)域和形態(tài)。(5)數(shù)值模擬了爆源距離對鋼筋混凝土框架結(jié)構(gòu)在爆炸荷載下的毀傷效應的影響,得到了同一高斯點在三種不同爆源距離下的應力時程曲線,加速度時程曲線,位移時程曲線和框架不同時刻的應力云圖,獲得了不同爆源距離下框架的破壞過程,區(qū)域和形態(tài)。
[Abstract]:In this paper, the damage effect of reinforced concrete members and frame structures under explosive loading is studied by numerical simulation method. The whole process of damage and the law of damage effect are obtained. The research results in this paper have some reference significance for the damage assessment of building structure after explosion. The contents and conclusions of this paper are as follows: numerical simulation of mixing under different working conditions. Damage effect of solidified soil column under explosion load, The cumulative damage diagram of concrete column with different explosive equivalent and different detonation source distance and the velocity time history curve of Gao Si point are obtained, and the damage degree and explosive equivalent are obtained. The damage effect of concrete-filled steel tubular column under explosion load is simulated numerically. The cumulative damage diagram of concrete element and steel tube element with different wall thickness and the velocity time-history curve of Gao Si point are obtained. The relationship between wall thickness and damage degree of concrete-filled steel tube (CFST) is obtained. The damage effect of reinforced concrete frame under explosion load is simulated numerically. Acceleration time history curve, displacement time history curve, The damage and failure process of the frame and the influence area of blast wave propagation are obtained. The numerical simulation of the effect of explosive equivalent on the damage effect of reinforced concrete frame structure under explosion load is carried out. The stress time history curve, acceleration time history curve, displacement time history curve and stress cloud diagram at different time of frame at the same Gao Si point under three kinds of explosive equivalent are obtained, and the failure process of frame under different explosive equivalent is obtained. Region and shape. 5) the effect of explosion source distance on damage effect of reinforced concrete frame structure under explosion load is simulated numerically. The stress time history curve and acceleration time history curve of the same Gao Si point under three different explosion source distances are obtained. The displacement time history curve and the stress cloud diagram of the frame at different times are used to obtain the failure process, region and shape of the frame under different explosion source distances.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU375.4

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