摘要
双钢板-再生混凝土组合(steel-recycled aggregate concrete composite,SRAC)墙是由双层钢板与内填再生混凝土组成的一种新型组合构件,其在核电站、超高层建筑等结构中具有广泛应用前景。作为重要承重构件,抗冲击性能也是其推广应用的关键性能指标。为此,在前期试验研究基础上,采用ABAQUS软件对冲击作用下SRAC墙的动力响应开展了数值模拟,重点分析了钢板厚度、再生粗骨料取代率、轴压比、冲击能量以及材料强度对SRAC墙抗冲击性能的影响规律;基于试验与有限元结果,建立了考虑再生粗骨料取代率与预加轴力影响的等效双自由度模型,并对SRAC墙冲击力与挠度时程发展进行了预测。结果表明:组合墙在冲击荷载下呈现整体弯曲变形,冲击区域出现明显局部凹陷;随着轴压比与再生粗骨料取代率增大,构件的抗冲击性能逐渐削弱,钢板厚度增大有效增强了SRAC墙的抗冲击承载力;基于双线性抗力函数建立的等效双自由度模型可较好预测冲击荷载下SRAC墙的动力响应。
The steel-recycled aggregate concrete composite(SRAC)wall,consisting of two outer steel plates and filled recycled aggregate concrete,is a new type of composite member with promising applications in nuclear power plants,high-rise buildings,etc.As a critical load-bearing component,its impact resistance is also a key performance indicator for its application.Therefore,on the basis of the previous experimental research,ABAQUS software was employed to perform finite element analysis on the dynamic response of SRAC wall under an impact.The influence of steel plate thickness,replacement of coarse recycled aggregate,axial compression ratio,impact energy and material strength on the impact resistance of SRAC wall was evaluated.According to the experimental and finite element results,an equivalent two-degree-of-freedom model was established to predict the impact force and displacement curves of SRAC wall,taking into account the influence of the replacement of coarse recycled aggregate and axial load.The results show that under impact load,the composite wall exhibits an overall bending deformation mode,with a significant local indentation in the impact area.As the axial compression ratio and replacement of coarse recycled aggregate increase,the impact resistance of the specimens gradually weakens,while increasing the thickness of the steel plates effectively enhances the impact bearing capacity of SRAC wall.The equivalent two-degree-of-freedom model using the bilinear resistance function can effectively predict the dynamic response of SRAC walls under impact loads.
作者
王宇恒
王蕊
杨耀堂
赵晖
吕建峰
WANG Yuheng;WANG Rui;YANG Yaotang;ZHAO Hui;LÜJianfeng(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Civil Engineering Disaster Prevention and Control,Taiyuan University of Technology,Taiyuan 030024,China;China Shanxi Sijjian Group Co.,Ltd.,Taiyuan 030032,China)
出处
《振动与冲击》
北大核心
2025年第24期171-181,258,共12页
Journal of Vibration and Shock
基金
国家自然科学基金(52108162)
山西省重点国别科技合作项目(202204041101010)。
关键词
双钢板-再生混凝土组合(SRAC)墙
冲击
有限元
参数分析
双自由度
steel-recycled aggregate concrete composite(SRAC)wall
impact
finite element
parametric analysis
two-degree-of-freedom
