Jianhang Chen , Shiji Wang , Songsong Hu , Kun Wang , Banquan Zeng , Shaokang Wu , Wenbing Fan , Zhixiang Song , Xiaohang Wan
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引用次数: 0
Abstract
Experimental and numerical investigation were conducted on shear behaviour of steel fibre-reinforced cement grout (SFRCG) through inclined shearing. First, the influence of fibre volume fraction and tilt angle on shear characteristics of SFRCG was studied through inclined shear tests. Results indicate that adding steel fibres enhanced shear strength and ductility of cement grout. With fibre volume fraction increasing from 0 to 1.5%, shear strength of SFRCG initially increased and then decreased. It remained higher than plain grout. However, as tilt angle increased from 38° to 60°, shear strength of SFRCG continued to decrease. Steel fibres prevented cracks from penetrating. Consequently, specimens were not completely cut off. Moreover, adding steel fibres changed failure modes when tilt angle was 45°. Then, the scanning electron microscope (SEM) method was adopted to examine microstructure of SFRCG. Finally, parameter calibration was conducted based on a series of laboratory test results. Three-dimensional discrete element method (DEM) models of SFRCG were established. Shear failure process and mechanism of SFRCG were revealed based on the relationship between stress state and specimen microcrack evolution in DEM simulation. Numerical simulation results agreed well with laboratory test results. Additionally, function mechanism of steel fibres in cement-based materials was also discussed according to experimental and numerical results.
期刊介绍：
Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies.
Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials.
Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged.
Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.
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