【摘要】：目前,在爆炸事故分析、結(jié)構(gòu)抗爆設(shè)計(jì)、反恐怖襲擊和軍事領(lǐng)域分析中,鋼筋混凝土框架結(jié)構(gòu)的動力響應(yīng)分析始終都是一個首要且重要的課題。隨著恐怖分子對炸藥的越來越廣泛的利用,恐怖主義的蔓延愈演愈烈,恐怖爆炸活動對國際社會的和平與安寧造成了巨大威脅,給人類的生命安全和財(cái)產(chǎn)安全造成了極大的影響。本文對典型的四層框架結(jié)構(gòu)進(jìn)行了在外爆和Qg爆作用下的動力響應(yīng)分析,主要內(nèi)容包括:1.通過對既有實(shí)驗(yàn)的模擬驗(yàn)證了有限元材料模型參數(shù)的取值、網(wǎng)格單元尺寸及計(jì)算參數(shù)取值的有效性。計(jì)算結(jié)果表明,采用hypermesh方法建�？梢暂^好地對框架結(jié)構(gòu)進(jìn)行有限元分網(wǎng),計(jì)算所采用的網(wǎng)格尺寸及材料模型是適用的。2.建立典型框架結(jié)構(gòu)有限元模型,計(jì)算柱、梁、樓板、墻體等構(gòu)件在外部爆炸作用下的爆炸響應(yīng)及爆后的振動響應(yīng),分析了爆炸距離對框架結(jié)構(gòu)、框架柱、墻體的應(yīng)力、位移、加速度等的影響。3.對框架結(jié)構(gòu)進(jìn)行Qg爆作用下的有限元分析,考慮不同炸藥量對結(jié)構(gòu)爆炸響應(yīng)的影響。對于迎爆面的樓層,炸藥量越大,迎爆面的樓板毀傷及相應(yīng)的加速度、速度和位移也越大。而對于不直接受爆炸沖擊波影響的樓層,毀傷及位移等響應(yīng)與引爆面的響應(yīng)規(guī)律不同,受到梁柱等構(gòu)件的變形協(xié)調(diào)效應(yīng)及波的震動效應(yīng)的影響。通過研究框架結(jié)構(gòu)在外爆及Qg爆作用下的動力響應(yīng),可為建筑結(jié)構(gòu)的侵爆毀傷評估工作提供參數(shù),為工程結(jié)構(gòu)的防爆抗爆防護(hù)工作提供參考。
[Abstract]:At present, the dynamic response analysis of reinforced concrete frame structure is always a primary and important subject in explosion accident analysis, structural anti-explosion design, anti-terrorist attack and military field analysis. With the more and more extensive use of explosives by terrorists and the growing spread of terrorism, terrorist bombings pose a great threat to the peace and tranquillity of the international community. The safety of human life and property has been greatly affected. In this paper, the dynamic response of a typical four-story frame structure under external blasting and Q _ g blasting is analyzed. The main contents are as follows: 1. Through the simulation of the existing experiments, the validity of the parameters of the finite element model, the size of the mesh element and the calculation parameters is verified. The results show that the finite element method can be used to model the frame structure, and the mesh size and material model are suitable. The finite element model of typical frame structure is established to calculate the explosion response and vibration response of columns, beams, floors and walls under external explosion. The stress and displacement of frame structure, frame column and wall are analyzed. The effect of acceleration, etc. The finite element analysis of the frame structure under the action of QG detonation is carried out, and the effect of different explosive quantity on the explosion response of the structure is considered. For the floor of the explosive face, the larger the explosive content, the greater the floor damage, acceleration, velocity and displacement. However, for floors not directly affected by blast wave, the responses such as damage and displacement are different from those of detonation surface, which are influenced by the deformation coordination effect of Liang Zhu and the vibration effect of wave. By studying the dynamic response of frame structure under external explosion and QG explosion, the parameters can be provided for the damage assessment of building structure, and the reference for anti-explosion and anti-explosion protection of engineering structure can be provided.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU311.3

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