Abstract

A hidden concrete column was built at the core of the T-shaped joints composed of plaster-concrete compound panels in order to study their earthquake resistant behavior. In this paper, earthquake resistance tests were performed on two types of composite T-shaped joints, six samples in total, in which the horizontal steel bars were embedded and not embedded in their core, to analyze the mechanical deformation, cracking, hysteretic behavior, ductility, and stiffness degeneration of the composite T-shaped joints as well as their energy dissipation properties such as damping coefficient, energy dissipation coefficient, and power ratio coefficient. The two types of composite joints composed of interior and exterior compound walls were found to have good mechanical properties. A comparison of the various indicators for the two types of T-shaped joints revealed that embedding the horizontal steel bars embedded in the web and flange of the T-shaped joints in their core can help improve the earthquake resistance and energy dissipation properties of the composite T-shaped joints.

Highlights

  • In recent years, vigorously developing green buildings has been a common concern for people around the world due to environmental pollution and energy shortage

  • Earthquake resistance tests were performed on two types of joints under cyclic loading to analyze their mechanical deformation, cracking, failure modes, hysteretic behavior, ductility, stiffness degeneration, and energy dissipation properties such as damping coefficient, energy dissipation coefficient, and power ratio coefficient

  • The results indicated that the TJS samples had better earthquake resistance properties than the TJ samples

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Summary

Introduction

Vigorously developing green buildings has been a common concern for people around the world due to environmental pollution and energy shortage. Due to its good tensile resistance, sound insulation, heat resistance, corrosion resistance, and insulation properties, fiberglass is often used as a reinforcing material in building compound materials It can form a perfect combination with plaster or concrete interfaces, help improve the strain and toughness properties of plaster‐concrete compound materials, and effectively prevent the formation and evolution of small cracks [6]. Fiberglass, various chemical admixtures, a small amount of cement, and a certain amount of water can be added to gypsum to make plaster panels with good mechanical properties. These kinds of plaster panels are primarily produced by machines in factories to make interior or exterior walls. The effects of the embedding of the horizontal steel bars in the web (interior wall) in the core of the composite T‐shaped joints on the earthquake resistant behavior of the composite T‐ shaped joints are studied

Sample design
Material properties
Plaster panels
Initial cracking stage
Crack evolution stage
Failures
Hysteretic behavior
Skeleton curves
Stiffness degeneration curves
Energy dissipation capacity
Equivalent viscous damping coefficient he
Energy dissipation coefficient E
Strain analysis
Ability assessment of T‐shaped columns
Findings
Conclusion
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