垂直撞击下混凝土框架结构振动响应及其影响因素分析
发布时间：2018-07-13 15:05
【摘要】：采用ABAQUS有限元分析软件建立了三层三跨混凝土框架结构,研究了撞击位置、撞击质量和初始撞击速度对框架结构动力响应的影响。研究结果表明:撞击力峰值受初始撞击速度影响最大,其次是撞击质量,而撞击位置影响最小;梁跨中最大挠度和最终挠度受初始撞击速度的影响较大,而撞击位置和撞击质量对其影响较小;当撞击力作用于同层边跨梁时,相邻梁柱节点混凝土拉伸损伤较为严重,而当撞击力作用于同层中跨梁时,整个框架梁柱节点混凝土拉伸损伤相对较轻,但损伤分布相对较广;随着撞击质量和初始撞击速度的增大,整个框架结构损伤越来越严重,框架梁和梁柱节点是主要耗能部位。
[Abstract]:A three-story three-span concrete frame structure was established by Abaqus finite element analysis software. The effects of impact position, impact mass and initial impact velocity on the dynamic response of the frame structure were studied. The results show that the peak value of impact force is the most affected by the initial impact velocity, followed by the impact mass, and the impact position is the least, and the maximum deflection and the final deflection of the beam span are greatly affected by the initial impact velocity. The impact position and impact mass have little effect on it, when the impact force acts on the same side span beam, the concrete tensile damage of adjacent Liang Zhu joint is more serious, but when the impact force acts on the middle span beam of the same layer, the concrete of adjacent Liang Zhu joint is damaged more seriously, and when the impact force acts on the middle span beam of the same layer, With the increase of the impact mass and the initial impact velocity, the damage of the whole frame structure becomes more and more serious, and the frame beam and the Liang Zhu joint are the main energy consuming sites.
【作者单位】： 南京工业大学土木工程学院;
【基金】：国家自然科学基金项目(51478222、51308293)资助
【分类号】：TU375.4
[Abstract]:A three-story three-span concrete frame structure was established by Abaqus finite element analysis software. The effects of impact position, impact mass and initial impact velocity on the dynamic response of the frame structure were studied. The results show that the peak value of impact force is the most affected by the initial impact velocity, followed by the impact mass, and the impact position is the least, and the maximum deflection and the final deflection of the beam span are greatly affected by the initial impact velocity. The impact position and impact mass have little effect on it, when the impact force acts on the same side span beam, the concrete tensile damage of adjacent Liang Zhu joint is more serious, but when the impact force acts on the middle span beam of the same layer, the concrete of adjacent Liang Zhu joint is damaged more seriously, and when the impact force acts on the middle span beam of the same layer, With the increase of the impact mass and the initial impact velocity, the damage of the whole frame structure becomes more and more serious, and the frame beam and the Liang Zhu joint are the main energy consuming sites.
【作者单位】： 南京工业大学土木工程学院;
【基金】：国家自然科学基金项目(51478222、51308293)资助
【分类号】：TU375.4
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