锈蚀钢筋再生混凝土梁力学性能试验研究及ANSYS分析

Experimental and ANSYS analysis of mechanical property on corroded reinforced recycled concrete beams

通过对钢筋通电加速锈蚀的方法,对12根不同钢筋锈蚀率下粗骨料取代率为100%再生混凝土梁的三分点加载试验,分析相同强度条件下不同钢筋直径和锈蚀率的再生混凝土梁力学性能的影响。结果表明:当钢筋锈蚀率小于10%时,钢筋与再生混凝土的粘结强度足以保证两者能够共同工作,此时试验梁发生材料强度破坏模式;当钢筋锈蚀率超过了10%时,钢筋与再生混凝土的粘结强度不足以保证两者共同工作,此时试验梁发生粘结失效破坏模式。基于ANSYS有限元软件对不同钢筋锈蚀率的再生混凝土梁进行模拟分析,并对锈蚀钢筋再生混凝土梁跨中截面的荷载应力关系曲线进行验算,通过有限元结果与试验结果对比,验证了有限元分析模型的可靠性。

Through the method of reinforced electrifying corrosion,three points loaded test were carried out on 12 recycled aggregate concrete beams with 100% coarse aggregate replacement rate and different corrosion rate,and the effect of mechanical properties under the same strength conditions of different steel diameter and corrosion rate of recycled aggregate concrete beams were analyzed.Results show that when the steel corrosion rate is less than 10%,the bond strength of steel and recycled concrete beams sufficient to ensure that both can work together,and the test beams occurred damage mode of material strength;when the steel corrosion rate is greater than 10%,the bond strength of steel and recycled concrete beams insufficient to ensure that both can work together,and the test beams occurred damage mode of bond failure.Based on ANSYS finite element software with different reinforcement corrosion rate of recycled concrete beams simulation analysis,and the load-stress curve of the cross section of the corroded reinforced recycled concrete beams were checked,through the finite element results compared with the test results,verify the reliability of the finite element analysis model.