The fiber reinforced polymer (FRP)-concrete composite bridge deck is expected to be a competitive alternative to the reinforced concrete bridge deck owing to its great durability, low weight, and high loading efficacy. Based on previous studies, an optimized basalt FRP shell (BFRP)–concrete composite bridge deck was investigated experimentally and numerically in this study. Through the construction simulation test, the optimized BFRP shell was proved to be a qualified formwork with a 30.9% lower midspan deflection than the BFRP shell of previous studies and was lower than 1/800 of the net span. In the static test, the load capacities of deck specimens with depths of 200 mm and 180 mm reached 470 kN and 340 kN, respectively, with residual deflections lower than 7 mm. Meanwhile, the deck showed decent collaborative behavior, without visible interfacial debonding or slippage during the static test. Compared with the previously studied bridge deck, the bridge deck of the current study can achieve a higher short-term cost performance. After 175 days of three-point flexural sustained loading, the additional midspan deflections were 0.3 mm, 0.37 mm, and 0.46 mm, for load levels of 0.2, 0.25, and 0.3, respectively, which were less than 7% of their instantaneous elastic deflections. The finite element (FE) model was established using the Bailey-Norton model for the creep of the FRP and Bazant’s B-3 model for the creep of the concrete. The FE results were in good agreement with the experimental results, both in short- and long-term scenarios. Using numerical simulation with a load duration of 50 years, the allowable load level of this bridge deck reached 0.4, which meets the criteria for creep deflection in the ACI standard.

纤维增强聚合物（FRP）-混凝土复合桥面板由于其耐用性高，重量轻和高载荷功效而有望成为钢筋混凝土桥面板的竞争替代品。在以前的研究的基础上，本研究通过实验和数值研究了优化的玄武岩FRP壳（BFRP）-混凝土复合桥面板。通过施工模拟测试，证明优化的BFRP壳是合格模板，其中跨挠度比先前研究的BFRP壳低30.9％，并且小于净跨度的1/800。在静态测试中，深度为200 mm和180 mm的甲板样品的承载能力分别达到470 kN和340 kN，残余挠度小于7 mm。同时，牌组表现出良好的协作行为，在静态测试过程中没有明显的界面剥离或滑动。与先前研究的桥面相比，当前研究的桥面可以实现更高的短期成本效益。在三点挠曲持续荷载作用175天之后，附加的中跨挠度分别为0.2、0.25和0.3，分别小于其瞬时弹性挠度的7％，0.3mm，0.37mm和0.46mm。 。有限元（FE）模型是使用Bailey-Norton模型建立的FRP蠕变和Bazant的B-3模型建立的混凝土蠕变。在短期和长期情况下，有限元结果与实验结果均吻合良好。使用50年载荷持续时间的数值模拟，该桥面的允许载荷水平达到0.4，