中文摘要：

海工混凝土在海洋环境下的抗侵蚀性能是影响混凝土耐久性的一个重要因素。为研究聚丙烯腈纤维海工混凝土抗侵蚀性及其在受力状态下的工作性态,对聚丙烯腈纤维海工混凝土进行了侵蚀和力学试验。通过用浸烘循环的试验方法模拟海洋环境下混凝土侵蚀过程,并在对其加载时用超声波检测受力状态下混凝土的工作性态。试验结果表明：聚丙烯腈纤维可在海工混凝土的开裂面上继续承担受力作用,抑制裂缝的开展。对于侵蚀后的海工混凝土,这样的工作方式是有利的。

英文摘要：

Being a very important factor relate to the durability of marine concrete,the resistance power of marine concrete to the seawater corrosion have got a lot of attention by research scholars.For the purpose of researching its resistance power to the seawater corrosion and operating performance under applied loads,the polyacrylonitrile fiber reinforced marine concrete was used by authors for corrosion and mechanics tests.We used wet-dry cycling method to simulate the corrosion of concrete in the sea environment and UT（ultrasonic testing） when loading the concrete to study its operating performance.The results of the test indicate that polyacrylonitrile fiber can bear stress role on the cracked area of marine concrete and restrain the development of fissure that is advantageous to the corrode concrete.