CFRP加固含初始裂纹的RC梁的抗爆性能研究
发布时间：2018-07-21 09:56
【摘要】：碳纤维复合材料(CFRP)加固建筑结构是一种新兴的加固技术。国内外鲜有CFRP加固含初始裂纹的结构构件(如RC梁)的抗爆性能的研究报道。基于大型非线性动力学分析软件LS-DYNA,从加固层数和加固宽度两方面对CFRP局部全包裹加固含初始裂纹RC梁(裂纹梁)的抗爆性能进行非线性有限元数值分析。研究表明,采用CFRP对裂纹梁的裂纹处进行局部全包裹加固可提高裂纹梁的整体刚度,减小其在爆炸荷载作用下的损伤和变形程度。当CFRP的加固层数为4层、加固宽度为300mm时,可有效提高裂纹梁的抗爆性能。该研究成果对建筑结构抗爆设计和抗爆加固研究具有一定的指导意义。
[Abstract]:Carbon fiber reinforced polymer (CFRP) is a new strengthening technique for building structure. There are few studies on the anti-explosion performance of CFRP strengthened structural members (such as RC beams) with initial cracks at home and abroad. Based on the large-scale nonlinear dynamic analysis software LS-DYNA, the nonlinear finite element numerical analysis of the anti-explosion performance of RC beams with initial cracks strengthened by CFRP is carried out from the aspects of the number of strengthened layers and the width of reinforcement. The results show that the whole stiffness of cracked beam can be improved and the degree of damage and deformation can be reduced by using CFRP to reinforce the crack of cracked beam. When the number of strengthened layers is 4 and the width is 300mm, the anti-explosion performance of cracked beams can be improved effectively. The research results have certain guiding significance for the study of anti-explosion design and anti-explosion reinforcement of building structure.
【作者单位】： 辽宁工业大学土木建筑工程学院;
【基金】：国家自然科学基金(11302094,11302093) 辽宁省高等学校优秀人才支持计划项目(LJQ2014063,LJQ2015047) 辽宁省教育厅科研项目(L2011095)
【分类号】：TU375.1;TB33
本文编号：2135151
[Abstract]:Carbon fiber reinforced polymer (CFRP) is a new strengthening technique for building structure. There are few studies on the anti-explosion performance of CFRP strengthened structural members (such as RC beams) with initial cracks at home and abroad. Based on the large-scale nonlinear dynamic analysis software LS-DYNA, the nonlinear finite element numerical analysis of the anti-explosion performance of RC beams with initial cracks strengthened by CFRP is carried out from the aspects of the number of strengthened layers and the width of reinforcement. The results show that the whole stiffness of cracked beam can be improved and the degree of damage and deformation can be reduced by using CFRP to reinforce the crack of cracked beam. When the number of strengthened layers is 4 and the width is 300mm, the anti-explosion performance of cracked beams can be improved effectively. The research results have certain guiding significance for the study of anti-explosion design and anti-explosion reinforcement of building structure.
【作者单位】： 辽宁工业大学土木建筑工程学院;
【基金】：国家自然科学基金(11302094,11302093) 辽宁省高等学校优秀人才支持计划项目(LJQ2014063,LJQ2015047) 辽宁省教育厅科研项目(L2011095)
【分类号】：TU375.1;TB33
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1 孙杰,朱立新,钟兵,胡金华,王清洁;玻璃钢蜂窝夹层复合材料抗爆性能研究[J];工程塑料应用;2003年03期
，本文编号：2135151
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