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Initial cracking strength and initial fracture toughness from 3-p-b and WS concrete specimens
  • +4
  • Xianhua Yao,
  • Lielie Li,
  • Junfeng Guan,
  • Min Zhang,
  • Zepeng Liu,
  • Ruicong Han,
  • Shuanghua He
Xianhua Yao
North China University of Water Resources and Electric Power
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Lielie Li
North-China University of Water Conservancy and Electric Power
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Junfeng Guan
North China University of Water Resources and Electric Power
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Min Zhang
North China University of Water Resources and Electric Power
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Zepeng Liu
North China University of Water Resources and Electric Power
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Ruicong Han
North China University of Water Resources and Electric Power
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Shuanghua He
North China University of Water Resources and Electric Power
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Abstract

A concept of initial cracking strength of concrete is elaborated in this study. A fracture model and associated methods for determining independent initial cracking strength and initial fracture toughness by using the three-point-bending (3-p-b) and wedge splitting (WS) concrete specimens are present. The initial cracking strength and initial fracture toughness can be simultaneously determined using a curve-fitting method from the proposed fracture model. All of the initial fracture curves can be obtained using the determined concrete materials. The initial loads of the 3-p-b and WS specimens can be predicted on the basis of the curves with ±15% ranges. Furthermore, analytical functions are used to obtain and determine the initial cracking strength and the initial fracture toughness of concretes directly. The determined values with ±15% ranges cover the most of initial loads of the 3-p-b and WS specimens.

Peer review status:IN REVISION

06 Jul 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
11 Jul 2020Assigned to Editor
11 Jul 2020Submission Checks Completed
14 Jul 2020Reviewer(s) Assigned
01 Sep 2020Review(s) Completed, Editorial Evaluation Pending
05 Sep 2020Editorial Decision: Revise Major