锈蚀钢筋再生混凝土梁力学性能试验研究及ANSYS分析

发布时间：2018-04-29 10:27

本文选题：再生混凝土梁 + 锈蚀率　；参考：《土木建筑与环境工程》2015年S2期

【摘要】：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。
[Abstract]:By the method of accelerating corrosion of steel bars, the three-point loading test of 12 reinforced concrete beams with 100% replacement ratio of coarse aggregate under different corrosion rates of steel bars was carried out. The influence of different steel bar diameter and corrosion rate on the mechanical properties of recycled concrete beams under the same strength is analyzed. The results show that when the corrosion rate of steel bar is less than 10, the bond strength between steel bar and recycled concrete is enough to ensure that the two can work together. The bond strength between rebar and recycled concrete is not enough to ensure the joint work of the two, and the failure mode of bond failure occurs in the test beam. Based on the ANSYS finite element software, the reclaimed concrete beams with different corrosion rates are simulated and analyzed, and the load-stress curves of the mid-span sections of the corroded reinforced recycled concrete beams are checked and calculated. The finite element results are compared with the experimental results. The reliability of the finite element analysis model is verified.
【作者单位】：内蒙古科技大学;南京航空航天大学;
【基金】：内蒙古自治区自然科学基金(NJZY12102) 包头市科技计划(2014X1009)
【分类号】：TU375

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