Tang, Y.; Feng, J.; Fu, Y., and Xue, S., 2020. Experimental study on shrinkage and creep of high-strength concrete used in a coastal complex environment bridge under a cyclic load. In: Liu, X. and Zhao, L. (eds.), Today's Modern Coastal Society: Technical and Sociological Aspects of Coastal Research. Journal of Coastal Research, Special Issue No. 111, pp. 63–69. Coconut Creek (Florida), ISSN 0749-0208.
In recent years, the construction of expressway road networks in China's coastal areas has been accelerating. Numerous coastal, offshore, and cross-sea bridges have appeared. Under the complex environment of marine erosion, typhoons, waves, etc., most bridges use high-strength concrete as a building material. Shrinkage and creep, two of the basic characteristics of high-strength concrete, can cause abnormal growth of structural deformation and even concrete cracking, which affects the safety of bridge structures. Numerous studies have focused on the shrinkage and creep characteristics of high-strength concrete under a constant load, but there are few reports on the shrinkage and creep of high-strength concrete under a cyclic load. Using standard concrete creep specimens and prestressed reinforced concrete beam members as the test objects, the authors carried out a creep test of high-strength concrete under a cyclic load and obtained the elastic modulus and creep coefficient. Comparative analysis of the creep coefficient and an existing shrinkage and creep model shows that the creep of high-strength concrete under a cyclic load is significantly greater than that creep a constant load. In addition, the creep development of high-strength concrete under a cyclic load shows a uniform increasing characteristic, suggesting that a coupling relationship between the prestress loss and the creep process of high-strength concrete.