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Brick masonry uses bricks as the building blocks and involves building walls from individual bricks laid in mortar. The basic building block of brick masonry is the wythe, a vertical layer of bricks with a thickness of one brick. Within a wythe, bricks can be laid in various courses or patterns, with the most common being the stretcher course, where bricks are laid with their long edge horizontal and face parallel to the wall.
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The Bond-Slip Relationship at FRP-to-Brick Interfaces under Dynamic Loading.

Di Zhang1, Jun Yang1, Li Yuan Chi1

  • 1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.

Materials (Basel, Switzerland)
|January 27, 2021
PubMed
Summary

Interface debonding in fiber reinforced polymer (FRP) structures is a key failure mode. This study reveals how dynamic material properties affect the bond-slip relationship in FRP-to-brick interfaces under varying loads.

Keywords:
FRPbond–slipbrickdynamic loadingslip rate

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Area of Science:

  • Materials Science
  • Structural Engineering
  • Composite Materials

Background:

  • Interface debonding is the primary failure mechanism in fiber reinforced polymer (FRP) reinforced structures.
  • Understanding the bond-slip behavior at FRP-to-substrate interfaces under dynamic loading is crucial for structural integrity.

Purpose of the Study:

  • To investigate the bond-slip relationship at FRP-to-brick interfaces under dynamic loading.
  • To analyze the influence of dynamic material property enhancement on the bond-slip curve.

Main Methods:

  • Performed single-lap shear tests at two distinct loading rates.
  • Fitted slip distribution curves to derive the bond-slip relationship.
  • Developed and validated a numerical model incorporating strain rate effects.

Main Results:

  • FRP stiffness primarily affects the shape of the bond-slip curve.
  • Brick strength significantly influences the amplitude of the bond-slip curve.
  • Dynamic loading variations are attributed to enhanced brick strength and FRP stiffness, particularly within a specific slip rate range.

Conclusions:

  • The bond-slip relationship at FRP-to-brick interfaces is significantly influenced by dynamic loading effects.
  • A proposed empirical formula, accounting for dynamic FRP stiffness and brick strength, can predict this relationship under dynamic conditions.