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建立了考虑板底脱空及裂缝传荷能力的BFRP筋连续配筋混凝土路面荷载有限元模型,选取混凝土板厚及其弹性模量、基层弹性模量、BFRP筋的弹性模量及其配筋设计,以及地基反应模量等参数,对板底脱空状态下BFRP筋连续配筋混凝土路面板的力学响应及其裂缝传荷能力进行敏感性分析。研究结果表明,增加混凝土板厚可明显改善混凝土板的力学状态,提高混凝土板的模量不能有效改善混凝土板的力学状态;板底脱空区域宽度大时,增大基层弹性模量使混凝土板的受力状态变差;增大BFRP筋的弹性模量及配筋率可以略微改善脱空状态下的混凝土板受力状态和裂缝传荷能力;提高地基反应模量使受荷板板顶最大横向拉应力增大,横向裂缝传荷能力大幅降低,会导致裂缝处的BFRP筋连续配筋混凝土路面板的破坏。
The finite element model of continuous reinforced concrete pavement with BFRP tendons considering the void and fracture transfer of the bottom of the slab is established. The thickness and elastic modulus of the concrete slab, the elastic modulus of the foundation, the elastic modulus of BFRP tendons and their reinforcement Design, and the modulus of foundation reaction, the sensitivity of the continuous reinforced concrete pavement slabs with BFRP tendons and their load-carrying capacity are analyzed. The results show that increasing the concrete slab thickness can obviously improve the mechanical state of concrete slab and increasing the modulus of concrete slab can not effectively improve the mechanical state of concrete slab. When the width of slab bottom slab is large, the elastic modulus of base slab increases, The elastic modulus and reinforcement ratio of BFRP tendons can slightly improve the stress state and crack transmission capacity of concrete slab under the condition of emptying; the reaction modulus of foundation increases the maximum of load-bearing slab roof Lateral tensile stress increases, transverse crack load-carrying capacity is greatly reduced, will lead to cracks in the continuous reinforced concrete pavement slab damage.