济青高速公路既有6~16m跨径空心板抗弯承载力试验研究

Shear Bearing Capacity Experimental Investigations of Existing 6~16 m Span Prestressed Reinforced Concrete Hollow Slabs

JTG B01—2014《公路工程技术标准》针对车道活载数值进行了提高,材料设计强度降低,高速公路改扩建原有空心板桥的承载力普遍不满足现行规范标准的要求。为明确济青高速公路既有6~16 m跨径空心板的实际抗弯承载力,针对6 m,8 m,10 m,13 m,16 m跨径空心板开展抗弯承载力破坏试验研究。研究结果表明,既有空心板实测抗弯承载力较设计值均有较大富余度,规范计算结果偏于安全。

JTG B01—2014 Technical Standards for Highway Engineering has improved the value of the live load of lanes,the design strength of the materials has been reduced,and the carrying capacity of the original hollow slab bridges in the reconstruction and expansion of expressways generally does not meet the requirements of the current norms and standards.In order to clarify the actual flexural bearing capacity of existing 6~16 m span hollow slabs of Jiqing Expressway,the flexural bearing capacity failure test research was conducted for 6 m,8 m,10 m,13 m,16 m span hollow slab.The research results show that the measured flexural bearing capacity of the existing hollow slab has a greater margin than the design value,and the standard calculation results are safe.