Research on bond performance and bend strength of corroded reinforced recycled concrete beams
Cao Fubo1,2 Yin Runping2 Wang Chenxia2 Chen Zhiming3 Zhang Qiang3
1. Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China|
2. Inner Mongolia University of Science and Technology, Baotou 014010, China|
3. Baotou Lianchuang Special Engineering Co., Ltd., Baotou 014010, China
To study the bond performance and bend strength of recycled concrete with corroded bar, static load tests for 12 recycled concrete beams are carried out. It is showed that the recycled concrete beam shifts from bending failure when the rebar corrosion rate is less 9.31% to bond-slip-shear failure when the rebar corrosion rate is more than 9.31%. The yield load and the ultimate load of experimental beams decrease with the rate increasing of rebar corrosion, and the distribution of relative slip develops from parabola form into wavy lines. The tested beam cross sections of recycled concrete under normal using load coincidence with flat section assumption. The bearing capacity calculation method of corroded reinforced recycled concrete beams under bending is provided by the introduction of collaborative coefficient between corroded reinforced bar and recycled concrete when the rebar corrosion rate is from 0 to 9.31%. The comparison between the calculated results and the test results shows a good agreement.
曹芙波 尹润平 王晨霞 陈志明 张强. 锈蚀钢筋再生混凝土梁粘结性能及承载力研究[J]. 土木工程学报, 2016, 49(S2): 14-19.
Cao Fubo Yin Runping Wang Chenxia Chen Zhiming Zhang Qiang. Research on bond performance and bend strength of corroded reinforced recycled concrete beams. 土木工程学报, 2016, 49(S2): 14-19.
