爆炸作用下典型框架结构房屋的动力响应分析
发布时间：2018-07-18 12:41
【摘要】：目前,在爆炸事故分析、结构抗爆设计、反恐怖袭击和军事领域分析中,钢筋混凝土框架结构的动力响应分析始终都是一个首要且重要的课题。随着恐怖分子对炸药的越来越广泛的利用,恐怖主义的蔓延愈演愈烈,恐怖爆炸活动对国际社会的和平与安宁造成了巨大威胁,给人类的生命安全和财产安全造成了极大的影响。本文对典型的四层框架结构进行了在外爆和Qg爆作用下的动力响应分析,主要内容包括:1.通过对既有实验的模拟验证了有限元材料模型参数的取值、网格单元尺寸及计算参数取值的有效性。计算结果表明,采用hypermesh方法建模可以较好地对框架结构进行有限元分网,计算所采用的网格尺寸及材料模型是适用的。2.建立典型框架结构有限元模型,计算柱、梁、楼板、墙体等构件在外部爆炸作用下的爆炸响应及爆后的振动响应,分析了爆炸距离对框架结构、框架柱、墙体的应力、位移、加速度等的影响。3.对框架结构进行Qg爆作用下的有限元分析,考虑不同炸药量对结构爆炸响应的影响。对于迎爆面的楼层,炸药量越大,迎爆面的楼板毁伤及相应的加速度、速度和位移也越大。而对于不直接受爆炸冲击波影响的楼层,毁伤及位移等响应与引爆面的响应规律不同,受到梁柱等构件的变形协调效应及波的震动效应的影响。通过研究框架结构在外爆及Qg爆作用下的动力响应,可为建筑结构的侵爆毁伤评估工作提供参数,为工程结构的防爆抗爆防护工作提供参考。
[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.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU311.3
[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.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU311.3
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