引用本文摘 ? 要：為了解決正交異性鋼橋面的疲勞破壞病害，提出了一種基于免蒸養超高性能混凝土（UHPC）的鋼橋面組合結構，結合實際工程給出了栓釘布置和鋼筋間距的優化方案，總結了適用于鋼橋面鋪裝的UHPC材料性能指標；對于大面積攤鋪問題，設計了UHPC專用鋪裝施工設備，并進行了工藝性試驗；通過有限元模擬分析了潤揚大橋不同鋪裝體系下的變形情況，并與實橋監測數據進行了對比。結果表明：免蒸養UHPC結合完善的養護工藝能夠抑制早期收縮裂縫的產生與發展；UHPC鋪裝相較于原環氧瀝青混凝土鋪裝，鋼橋面板的最大拉應變下降了53.3%，最大肋間相對撓度下降了42%；UHPC鋪裝能大幅提高橋面系的剛度，降低正交異性鋼橋面板和鋪裝層的疲勞開裂風險。 Abstract: In order to solve the fatigue damage of orthotropic steel bridge deck, a composite structure of steel bridge deck based on non-steam curing ultra-high performance concrete (UHPC) was proposed. According to the supporting project, the optimization scheme of stud arrangement and reinforcement spacing was proposed, and the performance indexes of UHPC material suitable for steel bridge deck pavement were summarized. For the large-area paving problem, the special paving construction equipment for UHPC was designed and the process was carried out. The deformation of Runyang Bridge under different pavement systems was analyzed by finite element method, and compared with the monitoring data of real bridge. The results show that non-steam curing UHPC combined with perfect curing technology can control the generation and development of early shrinkage cracks. Compared with the original epoxy asphalt concrete pavement, the maximum tensile strain of steel deck is reduced by 53.3%, and the maximum relative deflection between ribs is reduced by 42%. UHPC pavement system can greatly improve the stiffness of bridge deck system, and reduce the risk of fatigue cracking of orthotropic steel deck and pavement insurance.
呂帥靈,商濤平,王洪新,等.現役鋼-UHPC橋面鋪裝修復技術研究[J].混凝土與水泥制品,2021(7):88-92. LYU S L,SHANG T P,WANG H X,et al.Research on Repair Technology of Existing Steel-UHPC Composite Bridge Deck[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):88-92.