摘要
进行了6个间接搭接试件的单向拉伸试验,结果表明所选取的搭接长度能够满足承载力要求,但搭接长度为1.0倍和1.2倍设计锚固长度的两个试件在连接筋屈服前就发生自由端滑移,根据应变分布变化及对比结果,建议设计搭接长度取为设计锚固长度的1.5倍。采用ABAQUS中Spring 2非线性弹簧单元对锚固拉拔试验和本试验进行了有限元模拟,结果表明采用Spring 2单元可以准确模拟锚固拉拔试验,对于连接筋连接试验,计算所得加载曲线和自由端滑移规律与试验相符,但连接筋应力分布有较大差别。
Uniaxial tension tests of six specimens with indirect lap splice have been completed.It has been concluded that the used splice length is enough to meet the demand of tension capacity ,but the slippages of free ends were observed for the two specimens with splice length of 1.0 and 1.2 times design anchorage length before the yielding of splice rebar.A splice length which is equal to 1.5 times the design anchorage length of splice rebar is suggested according to strain distribution and its variation.Finete element simulation of anchor- age pull - out test done by others and the tests in this paper has been conducted by using the Spring 2 element of ABAQUS software. The simulation results of pull - out test are accurate, the calculated loading curve and the law of free end slippage are in accord with the test results,but there are some differences between simulation and test for the stress distribution of splice rebar.
出处
《混凝土》
CAS
北大核心
2015年第11期12-16,20,共6页
Concrete
基金
国家高技术研究发展计划(863计划)课题(2013AA041307)
关键词
单向拉伸
装配式
剪力墙
连接筋
间接搭接
uniaxial tension
fabricated
shear wall
splice rebar
indirect lap splice
