用于盾构隧道进口的玻纤筋混凝土板的数值分析

Numerical Analysis of GFRP Bars Concrete Bidirectional Slab in Shield Driving

通过ANSYS对用于盾构隧道进口的玻璃纤维筋混凝土双向板的受弯性能进行了非线性全过程分析,并对玻璃纤维筋混凝土双向板和钢筋混凝土双向板的受力机理进行了分析比较。结果表明,通过合理选择有限元数值模型,可以较好地模拟玻璃纤维筋混凝土双向板的受弯性能,玻璃纤维筋混凝土双向板的跨中挠度较大,但其极限承载力比钢筋混凝土双向板的高,可以满足盾构隧道进口处挡土墙的强度要求。

This paper presents a numerical analysis investigation for evaluating the load deformation process of GFRP bars concrete bidirectional slab. The mechanism of GFRP bars concrete bidirectional slab and rebars concrete bidirectional slab were analyzed based on the numerical results. Compared with the last results, the numerical analysis can effectively simulate the flexural behavior of bidirectional slab strengthened with GFRP bars with the proper numerical model. The analytical results also indicate that the GFRP bars concrete bidirectional slab had larger distortion in span centre. But the ultimate bearing capacity of GFRP bars concrete bidirectional slab is higher. So it can meet the requirements of earth-retaining wall in shield driving.