The Impact Of Traffic-Induced Bridge Vibration On Rapid Repairing High-Performance Concrete For Bridge Deck Pavement Repairs

Due to rapid economic development in China, traffic volumes have significantly increased. Traffic loads on highways and bridges have continued to increase, which has caused significant damage to many bridge deck pavements and generated numerous heavy maintenance projects. During the process of highway bridge deck pavement renovation, bridge deck pavement repair projects should be performed without complete bridge closures(1/4 of the bridge is opened to traffic) to maintain efficient traffic lows. Because the repairing concrete endures constant impact from traffic-induced bridge vibration during the pouring, setting, and hardening processes,the impact of vibration on the mechanical performance and durability of repairing HPC for bridge deck pavement deserves our attention. Based on forced vibration tests for high-performance concrete(HPC), the influence of bridge vibration induced by traveling vehicle on compressive strength and durability of HPC has been studied.The experimental process are listed below.(1) Acquire workability, durability, high early age strength concrete and meet the requirements of freeway bridge deck pavement rapid repair through Optimize the benchmark ratio of the HPC and extender. This rapid repair HPC can be used to achieve the bridge deck with 24 to 72 hours, to realize the fast maintenance of bridge deck.(2) When to open the traffic depends on the impact of traffic-induced bridge vibration on the strength of early age rapid repairing concrete. The simple harmonic vibration provided by an electromagnetic experiment test stand was adopted to simulate bridge vibration. Base on the characteristics of concrete hardening, which can facilitate the analysis of the perturbation conditions for different concrete hardening phases. It is concluded that 1 d and 2 d compressive strength of HPC decreased significantly, and the maximum reduction rate is 9.1%, the impact of vibration on the late-phase strength of the HPC specimens was insignificant.(3) It is indicated that the amplitude exerts a more prominent influence on theearlier compressive strength with the comparison of the frequency. In addition, the impact of simple harmonic vibration on durability of HPC can be ignored; this shows the self-healing function of concrete resulting from later hydration reaction. Thus, the research achievements mentioned above can contribute to learning the laws by which bridge vibration affects the properties of concrete and provide technical support for the design and construction of the bridge deck pavement maintenance.(4) According the above research, Conducted field tests on the Jing Zhang Highway overpass, Jing Hu Highway bridge and Qin Hu Highway bridge. Test results prove that the rapid repair HPC has excellent construction performance and meet the requirements of bridge deck pavement rapid repair...