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由于纤维编织网增强混凝土在达到承载极限时,易发生脆断,不利于作为承载构件。该文尝试加入一定量的细直径钢筋以避免TRC的脆断破坏,纤维编织网作为受力的主体,而细直径钢筋作为次承载体。试验结果表明,加入延性好的细直径钢筋可以克服TRC构件仅采用纤维编织网增强时的脆断缺点。此外,纤维编织网的表面粘砂处理可以提高其和细直径钢筋协同受力的能力;细粒混凝土中加入聚丙烯纤维可提高构件的开裂荷载;而纤维编织网和细粒混凝土的界面植入U型钩有助于发挥纤维编织网的增强作用,从而提高了构件的承载力。最后,基于RC结构的抗弯设计理论,给出了TRC构件的解析计算方法,计算值与试验结果吻合得较好,证明了计算方法的可行性。
As the fiber braid reinforced concrete reaches the load limit, prone to brittle fracture, is not conducive to as a bearing member. This paper attempts to add a certain amount of fine-diameter steel bar to avoid the brittle fracture of TRC. The fiber braided mesh acts as the main body of the force, while the fine-diameter steel bar acts as the secondary bearing body. The experimental results show that adding brittle fracture of the TRC component with the fiber braid can be overcome by adding the fine ductile steel with good ductility. In addition, the surface sticky sand treatment of fiber braid can improve its ability to co-operate with the thin-diameter steel bar. The addition of polypropylene fiber to the fine-grained concrete can improve the cracking load of the component. The interfacial implantation of fiber braid and fine-grained concrete U-hook help to play a role in enhancing the fiber woven network, thereby enhancing the bearing capacity of the component. Finally, based on the RC bending resistance design theory, the analytical calculation method of the TRC member is given. The calculated values are in good agreement with the experimental results, which proves the feasibility of the calculation method.