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为研究配置600MPa高强钢筋的部分预应力混凝土梁构件的受力性能及适用性,对四根配置HRB600级钢筋作为非预应力筋的有黏结与无黏结部分预应力混凝土梁分别进行静载及疲劳试验研究。结果表明:循环加载前梁体是否开裂对梁体混凝土的疲劳性能有明显影响,非预应力高强钢筋变形恢复能力没有受到疲劳荷载作用影响,无黏结部分预应力混凝土梁和有黏结部分预应力混凝土梁的抗疲劳性能都较好,配置600MPa钢筋的部分预应力混凝土梁能够在实际工程中得到很好的应用。
In order to study the mechanical behavior and applicability of partially prestressed concrete beams with 600MPa high strength steel bars, four prestressed concrete beams with non-prestressed tendons and non-prestressed tendons were respectively subjected to static load and fatigue Experimental Research. The results show that whether the girder is cracked before cyclic loading has a significant effect on the fatigue performance of the girder, the deformation resilience of the non-prestressed high strength steel is not affected by the fatigue load. The unbonded partially prestressed concrete beams and the partially bonded prestressed concrete The anti-fatigue performance of the beam is good, and the partially prestressed concrete beam with 600MPa reinforcement can be well applied in practical engineering.