既有预应力混凝土空心板梁抗弯承载能力试验研究

Experimental Study on Flexural Bearing Capacity of Existing Prestressed Concrete Hollow Beam

依托某实际高速公路改扩建工程,论文对拆除下来的既有预应力混凝土空心板梁进行抗弯承载力试验设计,设计纯弯段为3m,采用两点加载,进行试验梁抗弯承载能力试验,分别获得了试验梁的开裂荷载、极限荷载和荷载-位移关系曲线。试验结果可为既有预应力混凝土空心板梁桥既有承载力评估提供依据。

Based on an actual highway reconstruction project,the flexural capacity test design of the existing prestressed concrete hollow slab beam is carried out.The flexural bearing capacity of the test beam was tested by using two-point loading.The cracking load,ultimate load and load-displacement relationship curves of the test beam were obtained.The experimental results can provide a basis for evaluating the existing bearing capacity of prestressed concrete hollow slab bridge.