## 6 Conclusions  
1. The designed bridge deck pavement adopted 8 cm thick UHPC and 4 cm modified asphalt concrete pavement, the transverse load-bearing performance of the beam slab was enhanced, and the overall bearing capacity was improved. Based on the conclusions of other researchers and the performance of UHPC, the UHPC thickness can be optimized.
2. Several researchers have already proved that the effect of planting reinforcement on the joint surface between the UHPC and the main girder is significant. This allows the original concrete layer and the UHPC layer to be more closely connected. Rebars planted at the hinge joint with UHPC greatly improve the transmission capacity of the transverse force between the slab girders.
3. In terms of the performance of the bond between the UHPC and the bridge, according to the stress analysis of the monitored rebar and UHPC, the change in the stress on the hinge joint was mainly tensile at less than 55 \(\mu\varepsilon\) and the amplitude was less than 10 \(\mu\varepsilon\). Judging from the similarity of the strains of the two types of gauges, the rebar and the UHPC maintain a good synergistic effect.; The shear deflection of the hinged joint due to the change in the beam was not obvious, which proves that the UHPC pavement had a positive impact.
4. Monitoring the amplitude of the reinforced bridge deck proved that the overall performance of the bridge reinforced with UHPC was significantly improved. The minimum and maximum amplitudes after reinforcement (minimum \(-1.5\)--\(-1.0\) mm, maximum 0.75-1.25 mm) were reduced by half compared to before reinforcement (minimum: \(-3.0\)--\(-2.0\) mm, maximum 2.0-3.0 mm).
5. The improvement in the flatness of the bridge surface has a positive effect on reducing bridge vibration. The resistance to the deformation of the UHPC pavement layer was relatively excellent, and the bond between the UHPC and girders was also very strong without delamination. It should be noted that the bridge pavement and hinge joints were repaired at the same time, which affected their respective contributions to a certain extent.
6. Since the reinforced pavement with reinforced hinges already increased the mechanical performance and affected the load distribution of each girder, the new theoretical calculation method for the live-load distribution factor should be restudied. The monitoring data from real bridges can play an auxiliary role in static load testing to verify the theoretical method.  
Figure 15: Average amplitude before and after reinforcement.  
**Author Contributions:** Conceptualization, W.Y. and F.L.; methodology, F.L.; validation, W.Y.; formal analysis, W.Y.; investigation, W.Y.; resources, W.Y.; data curation, W.Y.; writing--original draft preparation, W.Y.; writing--review and editing, W.Y.; visualization, W.Y.; supervision, F.L.; project administration, W.Y.; funding acquisition, W.Y. All authors have read and agreed to the published version of the manuscript.  
**Funding:** Ningbo Transportation Science and Technology Project (No.: 202108).  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** The data used to support the findings of this study are included within the article.  
**Conflicts of Interest:** The authors declare that they have no conflict of interest.