关键词: BFRP筋, 先张法, 预应力混凝土梁, 受弯性能, 试验研究

Abstract: To investigate the flexural behavior of BFRP tendon reinforced concrete beams, one full pre-stressed concrete beam and two partially pre-stressed BFRP tendon reinforced concrete beams, and one BFRP bar reinforced concrete beam were tested. The cracking, yield, failure load，and the development of the deflection and the cracks were tested. It showed that the cracking resistance capacity of the beams was enhanced through using BFRP tendons, and the width of deflection and cracks were better controlled. The failure load of the beams was enhanced as the reinforcement ratio of steel bars increased，the failure loads of the full pre-stressed beam and the non pre-stressed beam were basically unchanged. By using steel bars, the width and the interval of cracks were decreased, and the ductility was improved. The distribution and quantity cracks in the full pre-stressed and the non pre-stressed beams were basically the same. The cracks in the partially pre-stressed concrete beams were much more than the full pre-stressed and the non pre-stressed beams.

Key words: BFRP bars, pre-tension method, pre-stressed concrete beams, flexural behavior, experimental study