爆炸作用下鋼筋混凝土梁動力響應(yīng)數(shù)值模擬及破損分析
[Abstract]:The dynamic response and failure mode of reinforced concrete beam-slab members under explosion is an important subject in the research of structural anti-explosion dynamics, which has very important theoretical significance and engineering application value. In this paper, the dynamic response of a reinforced concrete beam under the condition of elastic bracing and the main factors affecting its failure form are studied by taking the reinforced concrete beam under the action of explosion as the research object. The main contents are as follows: 1. The numerical simulation of blast wave propagation in free air medium is carried out by using LS-DYNA software, and the numerical simulation results are compared with the empirical formula, and the applicability of the numerical simulation method used in this paper is verified. The formation mechanism of normal reflection, regular oblique reflection, Mach reflection and propagation of reflection shock wave on rigid wall are numerically simulated. In this paper, the modal function of the beam with elastic support under uniform load is derived, and the modal shape of the beam under this condition is obtained. Under certain assumptions, the second Lagrangian equation is used to solve the equation of motion of the elastic supported beam. 3. The reinforced concrete beam in the reference test is numerically simulated and analyzed by ANSYS/LS-DYNA. The numerical simulation results are compared with the experimental results, and then the establishment method of the dynamic analysis model of reinforced concrete beams under explosive load is found. 4, on the basis of the above research results, the dynamic analysis model of reinforced concrete beams under explosive load is established. The factors affecting the failure form of reinforced concrete beams are analyzed by numerical simulation, including the loading rate of explosive load, the strain rate effect of steel and concrete materials and the high-span ratio of members.
【學(xué)位授予單位】:哈爾濱工程大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TU375.1
【參考文獻】
相關(guān)期刊論文 前10條
1 陳萬祥;郭志昆;葉均華;;爆炸荷載作用下柔性邊界鋼筋混凝土梁的動力響應(yīng)與破壞模式分析[J];兵工學(xué)報;2011年10期
2 成鳳生;宋浦;顧曉輝;年崗;曾星星;;TNT裝藥爆炸波在剛性平面上方傳播反射的數(shù)值研究[J];爆破器材;2011年04期
3 方秦;陳力;張亞棟;柳錦春;;爆炸荷載作用下鋼筋混凝土結(jié)構(gòu)的動態(tài)響應(yīng)與破壞模式的數(shù)值分析[J];工程力學(xué);2007年S2期
4 鄧國強,周早生,楊秀敏;爆炸沖擊效應(yīng)數(shù)值仿真中的幾項關(guān)鍵技術(shù)[J];系統(tǒng)仿真學(xué)報;2005年05期
5 方秦,吳平安;爆炸荷載作用下影響RC梁破壞形態(tài)的主要因素分析[J];計算力學(xué)學(xué)報;2003年01期
6 柳錦春,方秦,龔自明,范俊余;爆炸荷載作用下鋼筋混凝土梁的動力響應(yīng)及破壞形態(tài)分析[J];爆炸與沖擊;2003年01期
7 宋順成,才鴻年;彈丸侵徹混凝土的SPH算法[J];爆炸與沖擊;2003年01期
8 張鳳國,李恩征;混凝土撞擊損傷模型參數(shù)的確定方法[J];彈道學(xué)報;2001年04期
9 陳大年,S.T.S.Al-Hassani,尹志華,俞宇穎,沈雄偉;混凝土的沖擊特性描述[J];爆炸與沖擊;2001年02期
10 方秦,柳錦春,張亞棟,錢七虎;爆炸荷載作用下鋼筋混凝土梁破壞形態(tài)有限元分析[J];工程力學(xué);2001年02期
相關(guān)會議論文 前1條
1 蔡清裕;曾新吾;;混凝土率相關(guān)連續(xù)損傷本構(gòu)模型[A];第四屆全國爆炸力學(xué)實驗技術(shù)學(xué)術(shù)會議論文集[C];2006年
相關(guān)博士學(xué)位論文 前1條
1 李敏;材料的率相關(guān)性對鋼筋混凝土結(jié)構(gòu)動力性能的影響[D];大連理工大學(xué);2011年
,本文編號:2452991
本文鏈接:http://sikaile.net/guanlilunwen/chengjian/2452991.html