BFRP筋无粘结预应力混凝土梁受弯性能试验研究

Experimental Research on the Flexural Behavior of BFRP Bar Unbonded Prestressed Concrete Girder

进行了BFRP筋无粘结部分预应力混凝土梁与全预应力梁、非预应力梁受弯性能对比试验，并对非预应力钢筋配筋率对BFRP筋无粘结预应力混凝土梁受弯性能的影响进行试验研究，再测试各试件的开裂荷载、钢筋屈服点荷载、极限荷载、BFRP筋和普通钢筋应变发展情况、梁顶部及底部混凝土应变发展情况、平截面假定、荷栽一变形曲线和裂缝发展情况。在试验研究的基础上，对比分析了各试验参数对受弯性能的影响。

The flexural behavior contrast experiment between full prestressed beams,unprestressed beams and partially prestressed concrete beams of BFRP bars are carried out under static loadings. The unprestressed steel reinforcement ratio and the prestress of BFRP bars are studied in the experiments. In the tests, the cracking loads, the yield loads, the failure loads, the development of strains of reinforcement bars and concrete, the load-deflection relationship, and the development of cracks are investigated. Through experimental research ,the contrast anlysis of the influence of experiment parameter to the flexural behavior is put forward.