Experimental research on fracture behavior of concrete after high temperature

被引：5

作者：

Qiu, Peng ^{[1
]}

机构：

[1] Jiangsu City Vocat Coll, Coll Architecture & Civil Engn, Nantong Campus, Nantong 226006, Peoples R China

来源：

FRATTURA ED INTEGRITA STRUTTURALE-FRACTURE AND STRUCTURAL INTEGRITY | 2019年 / 13卷 / 50期

关键词：

High temperature; Concrete; Fracture toughness; Fracture energy; ENERGY;

D O I：

10.3221/IGF-ESIS.50.25

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-strength concrete has been widely used in various complex buildings. The fracture and mechanical properties of high-strength concrete after tire have great research value. Based on the double K fracture model, the fracture properties of C70 strength grade concrete after being processed by high temperature of 25 degrees C similar to 800 degrees C were studied by three-point bending beam test. The change rules of fracture toughness KIC and fracture energy under different temperatures after being processed by high temperature were analyzed. The results showed that the initial crack toughness and instability toughness of C70 concrete decreased with the increase of temperature; the fracture energy first decreased rapidly and then decreased slowly with the development of temperature.

引用

页码：300 / 309

页数：10

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