Research On Evaluation Of The Durability Of Existing Open Type Wharf On Piles

Affected by seawater, RC structures of open type wharf on piles can not work so long as other RC structures. So researching on evaluation of the durability of existing open type wharf on piles is very important.Recent years the structral reliability has become an area that interested many researchers. The analysis of reliability could make a scientific, quantitative, general evaluation to the safety of the structral system. It has been used in the optimization of the structural design and decision-making of maintance & strengthing for existing structures, so the research of structural reliability can take an important role in the development of the national economy. Open type wharf on piles is in common use in port, and its durability can be solved by the durability theory of RC structure. But the durability model of open type wharf on piles has its particularity because of its structure and working envirment. This paper gives a useful method for the anylysis of the open type wharf on piles' durability and life.The main content included in the paper is as follows:(1) Many kinds of theories and methods that have been used in analyzing structral reliability are summarized here. Some remark to these theories and mathods has been given.(2) JC method is used to caculated the element reliability of open type wharf on piles. Based on the element reliability result, system reliability is caculate by multiplying the weight parameters which are gotten by AHP method. The resistent model of structure is given. Parameters of loadings are given too.(3) A model of open type wharf on piles' resistence by time is created. The model is mainly about the change of RC structure's resistence by time in seashore.(4) A durability model of existing open type wharf on piles is created. An instance is analysed by using this model.