Microstructure based life-cycle assessment and durability design of concrete bridges

Koichi Maekawa, Benny Suryanto, Chikako Fujiyama, Nobuhiro Chijiwa

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Moisture and cracks are the two scourges of structural concrete, and understanding the interactions between the two is the key to determine long-term durability performances. This paper firstly deals with moisture migration and its volume change with creep in four inservice PC bridge viaducts that are experiencing excessive deflections by using a-3D integrated micro-material-structural modeling. It is found that moisture-migration related deflections driven by the capillary surface tension and disjoining pressures in micro pores account for 25 to 45% of the macroscopic deflections. These apparent kinematics can be approximated by adding the moisture-related time-dependent deflections to the mechanisticinduced creep by external loads. This paper then deals with water-crack interaction in RC bridge decks under moving loads. It is found that the water presence on the upper deck parts, when subjected to high-speed traffics, can shorten the deck fatigue life by one-and-a-half order of life-span. This reduction in life is due to high water pressure developing over a large numbers of wheel passages as well as the reduced shear transfer along crack planes.
    Original languageEnglish
    Title of host publicationProceedings pro083
    Subtitle of host publication2nd International Conference on Microstructural-related Durability of Cementitious Composites
    EditorsGuang Ye, K van Breugel, Wei Sun, Changwen Miao
    PublisherRILEM
    Pages20 - 28
    Number of pages9
    ISBN (Electronic)978-2-35158-123-0
    ISBN (Print)978-2-35158-129-2
    Publication statusPublished - 2012
    Event2nd International Conference on Microstructural-related Durability of Cementitious Composites - Amsterdam, Netherlands
    Duration: 11 Apr 201213 Apr 2012

    Conference

    Conference2nd International Conference on Microstructural-related Durability of Cementitious Composites
    CountryNetherlands
    CityAmsterdam
    Period11/04/1213/04/12

    Keywords

    • Durability
    • Fatigue
    • Crack-water interaction

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  • Cite this

    Maekawa, K., Suryanto, B., Fujiyama, C., & Chijiwa, N. (2012). Microstructure based life-cycle assessment and durability design of concrete bridges. In G. Ye, K. van Breugel, W. Sun, & C. Miao (Eds.), Proceedings pro083: 2nd International Conference on Microstructural-related Durability of Cementitious Composites (pp. 20 - 28). RILEM.