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Determination of Tension Softening Relationship of Concrete from Crack Length Measurement |
Sunyiming LUO,Jun ZHANG(),Jiahe WANG |
Department of Civil Engineering, Tsinghua University, Beijing 100084 |
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Cite this article:
Sunyiming LUO,Jun ZHANG,Jiahe WANG. Determination of Tension Softening Relationship of Concrete from Crack Length Measurement. Chinese Journal of Materials Research, 2014, 28(11): 801-808.
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Abstract A method for acquiring the tensile softening relationship of concrete was presented, which is based on the measurement of flexural crack length using strain gauge and then through fitting the theoretical calculated load and the experimentally determined load for the same cracking length to obtain the tensile softening (s-w) relationship. As long as the s-w relationship is known, the cracking strength, tensile strength, fracture energy and characteristic length of brittleness can be derived. The tension softening relationship of three kinds of fast hardening concretes was obtained using above method. The results show that the cracking strength, tensile strength and fracture energy increase with the increasing compressive strength of concrete, while the characteristic length of brittleness decreases. Therefore, the obtained s-w relationship can be used for fracture analyses of concrete structures.
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Received: 06 May 2014
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Fund: *Surported by National Science Foundation of China Program No.51278278. |
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