预应力简支混凝土小箱梁荷载试验研究

Study on Static Load Test of Prestressed Concrete Simply Supported Small Box Girder

为了解在进行抗裂性试验后的预应力混凝土简支小箱梁在不大于60t试验荷载作用下小箱梁的弹性性能,对其进行单梁静载试验,并对测试断面弯矩值进行理论推导。研究表明,铺装层混凝土很大程度上参与了梁体截面共同受力作用,其承担弯矩值为理论计算的一半。

Abstract：In order to understand the elastic properties of prestressed concrete simply supported small box girder, on which crack resistance test was done, in not more than 60t testing load, a static load test is done on the small box girder, and the theoretical value of testing section ben- ding moment is derived. The study shows that pavement concrete largely involved in the role of the joint force of the beam cross-section, and the bending moment value is about half of theoreti- cal calculations.