摘要
预埋件的抗剪机理复杂,很难通过试验和理论计算确定预埋件的内力分布和应力大小,通常是在一定的简化与假定基础上,对试验结果统计回归得出预埋件的抗剪计算公式来进行计算.为更精确得到抗剪承载力,建立有限元模型对预埋件的受剪性能进行数值计算,锚板、锚筋与混凝土的相互作用通过三维面-面接触来模拟,并考虑了混凝土对锚筋的粘结作用.通过数值分析得到了剪力作用下预埋件的应力分布和锚筋的截面内力,确定了锚筋反弯点的位置和混凝土的承压范围.有限元计算得出的预埋件抗剪承载力与试验实测值很接近,说明所建立的有限元模型是比较合理的,数值分析的结果可以运用到理论分析和实际工程中.
The mechanism of embedded parts under shear is complex,and it is difficult to get the internal force and stress of embedded parts from test and theoretical calculation.Existing equations on the shear capacity of embedded parts were developed by fitting a theoretical model to the existing test results under a series of appropriate simplifications and assumptions. To improve the existing methods,numerical analyses of embedded part under shear are performed by establishing a finite element model.The interaction between anchor plate and concrete and the interaction between anchor bars and concrete are simulated with the three-dimensional surface-to-surface contact model, considering the bond strength between the anchor bars and the concrete.The stress distribution of embedded parts and the internal force of the anchor bars under shear are obtained by numerical analyses.The position of the inflection point of anchor bars and the pressure range of concrete are confirmed.The shear capacity of the embedded parts predicted by the numerical analyses agrees well with the results of tests,which indicates that the finite element model established is reasonable.The results of numerical analyses can be applied to the theoretical analyses and practical proj ects.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2014年第2期210-214,共5页
Journal of Dalian University of Technology
关键词
预埋件
剪力
数值分析
应力分布
截面内力
embedded part
shear force
numerical analysis
stress distribution
section internal force
