改性再生混凝土梁抗弯性能试验与分析

发布时间：2018-10-13 14:21

【摘要】：以硅粉含量和混杂纤维含量为试验参数,将1根普通混凝土梁作为对照组,3根不同硅粉含量和2根混杂纤维不同体积含量的梁作为试验组,对改性再生混凝土梁的抗弯性能进行分析,结果表明:改性再生混凝土梁与普通再生混凝土梁的破坏过程一样都具有明显的四个阶段,而且其基本受力过程也符合平截面假定;而且随着硅粉和混杂纤维的掺入使得改性再生混凝土梁的抗弯性能增强,抗开裂和极限承载力方面优于普通再生混凝土梁;而且按照规范计算出来的正截面极限承载力与试验值基本吻合,改性再生混凝土可以按照规范进行设计,为工程实践提供了参考依据。
[Abstract]:Taking silica fume content and hybrid fiber content as experimental parameters, one ordinary concrete beam was used as control group, and three beams with different silica fume content and two hybrid fiber different volume content were used as experimental group. The flexural behavior of the modified recycled concrete beam is analyzed. The results show that the failure process of the modified recycled concrete beam and the ordinary recycled concrete beam have obvious four stages, and the basic stress process of the modified recycled concrete beam also accords with the assumption of plane section. With the addition of silica fume and hybrid fiber, the flexural properties of the modified recycled concrete beams are enhanced, and the cracking resistance and ultimate bearing capacity of the modified recycled concrete beams are better than those of the ordinary recycled concrete beams. Moreover, the ultimate bearing capacity of normal section calculated according to the code is basically consistent with the test value. The modified recycled concrete can be designed according to the code, which provides a reference for engineering practice.
【作者单位】：西京学院土木工程学院;西安建筑科技大学土木工程学院;
【基金】：2015级研究生创新基金(2017-YJSXM-21) 国家自然科学基金(51178388,51008245,51678480) 陕西省教育厅重点实验室科研计划项目(11JS059,12JS055) 陕西省科技统筹创新工程计划(2013SZS01-Z02,2013SZS01-K01) 陕西省工业攻关项目资助(2014K06-34)
【分类号】：TU375.1

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