|
Title |
Service Life Prediction and Carbonation of Bridge Structures according to Environmental Conditions
|
|
Keywords |
탄산화 ; 내구수명 ; 내구적 파괴확률 ; 신뢰성 개념 Carbonation ; Service life prediction ; Failure probability of durability ; Reliability concept |
|
Abstract |
Carbonation is the results of the interaction of carbon dioxide gas in the atmosphere with the alkaline hydroxides in the concrete. Reinforced steel corrosion due to concrete carbonation is one of main factors on the decrease in durability of RC structure. This study investigates the influence of carbonation on the bridges under various environment condition and quantifies the effect of carbonation various domestic field data. The failure probability of durability is evaluated on the basis of reliability concept. In addition, service life of the structures is predicted based on the intended probability of durable failure in domestic concrete specification. According to experimental results of the carbonation depth, the carbonation depth increased with structural age. It is analyzed that carbonation velocity of the structures under urban area and sea condition is 1.6-1.9 times faster than the river condition. Service life of the bridges under urban area and sea condition is decreased about 2.4-3.3 times than river condition.
|