配置HRB500级非预应力筋的无粘结部分预应力混凝土梁受弯性能试验研究

摘要

Unbonded partially prestressed concrete beam has a lower ultimate bearing capacity for the limitation of self force. In order to enhance the force performance of unbonded partially prestressed concrete beam, it's necessary to study the application of the 500 MPa steel bars. The paper mainly take into account of the influence of nonprestressed longitudinal reinforcement strength and reinforcement ratio bring to bending capacity. The results show that 500 MPa nonprestressed reinforcement can significantly improve the bending capacity of unbonded partially prestressed concrete beams.%无粘结部分预应力混凝土梁受其自身结构特点的限制,抗弯承载力较低.为改善无粘结部分预应力混凝土梁的受力性能,开展了HRB500级钢筋在该结构形式中的应用研究.主要考虑了非预应力强度等级及非预应力筋配筋率对无粘结部分预应力混凝土梁受弯性能的影响.研究结果表明,HRB500级钢筋的加入显著提高了该结构的受弯性能.