|Table of Contents|

Equal Durability Design Method for Concrete Structure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年02期
Page:
81-90
Research Field:
Publishing date:

Info

Title:
Equal Durability Design Method for Concrete Structure
Author(s):
CHEN Lin1;  QU Wen-jun2;  ZHU Peng2;  XIAO Jie3
(1. Shanghai Baoye Group Corp., Ltd., Shanghai 200941, China; 2. Department of Structural Engineering, Tongji University, Shanghai 200092, China; 3. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guan
Keywords:
concrete structure;  equal durability design;  service life;  thickness of protective layer
PACS:
TU318
DOI:
10.19815/j.jace.2019.03059
Abstract:
In view of the phenomenon that the durability of concrete structure was unbalanced, based on the durability design of concrete section, the durability design method of concrete structure was put forward, and the definition of equal durability design method was proposed. The component in concrete structure was classified and the service lives of different types of components were set to achieve the equal durability design method for sections. Firstly, the structure was divided into layers and modules. Based on the principle of equal durability, the target service life of each layer were determined, and then the service life was designed to make the durability service of each layer meet the requirements. At the level of component interface, measures were taken to avoid the durability failure caused by the early corrosion of the reinforcement at the corner of the interface, so as to achieve the equal durability of the section. By using the rules and methods of hierarchical modular division of structure, the method and process of determining the target service life based on the principle of equal durability, the overall process of equal durability design and the range of service life safety factors of different durability levels were proposed. For the corners where the durability was seriously insufficient, the reinforcement was replaced with stainless FRP reinforcement to avoid premature failure of the durability, and the test parts needed to meet the requirements of equal durability by adjusting the thickness of the protective layer. Due to the different local environment, the same type of components needed to set different thickness of protective layer to achieve the goal of equal durability. The process of durability design such as interface and structure level was proved by an example of a concrete bridge. The results show that the durability design can optimize the service life of various components, reasonably arrange the initial investment, reduce the number of overhaul, reduce the maintenance cost in the later stage of the structure, extend the structure life, and realize the sustainable development of concrete structure.

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Last Update: 2020-04-21