|Table of Contents|

Mechanical Property Deterioration Model for Concrete in Environment with Freezing-thawing(PDF)

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

Issue:
2009年01期
Page:
62-67
Research Field:
Publishing date:
2009-03-20

Info

Title:
Mechanical Property Deterioration Model for Concrete in Environment with Freezing-thawing
Author(s):
ZHU Jin-peng1;  LI Shu-cai1;  LIU Xian-bo2;  LIU Min2
1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, Shandong, China; 2. Shandong Road & Bridge Construction Co., Ltd., Jinan 250014, Shandong, China
Keywords:
concrete;  strength reduction model;  freezing-thawing cycle;  mesoscopic numerical simulation;  mechanical property
PACS:
TU375
DOI:
-
Abstract:
Based on the freezing-thawing test and micro-mechanics of concrete,the mechanical properties of concrete after freezing-thawing were studied, and the strength reduction model and elastic modulus reduction model were built with the changes of freezing-thawing cycles of concrete. In aspects of freezing-thawing test,the compressive tests of concrete specimens and mortar specimens which were made according to the ratio of concrete suffering 100, 200 and 300 cycles of freezing-thawing were completed. Using the large static-dynamic triaxial test system for concrete, the influences of cycles of freezing-thawing on the compressive strength of concrete, elastic moduli and stress-strain relationships were tested. In aspects of micro-mechanics,examination of the concrete specimen was numerically simulated. To consider the non-uniformity of the various components, the nature of the material of the various components was assigned in accordance with the Weibull distribution. In order to reflect the impact of freezing-thawing to concrete, the strength and elastic modulus of mortar specimens were both assigned according to the results of mortar freezing-thawing test. The results show that this method can offer references for further research on deterioration mechanism and calculation model of reinforced concrete structures in actions of freezing-thawing cycles.

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Last Update: 2009-03-20