Failure mode dependent shear strength of unreinforced concrete brick masonry wall panels

 INTRODUCTION

This section introduces the purpose and significance of the study, emphasizing the need to evaluate shear strength in unreinforced concrete brick masonry wall panels under diagonal compression.

EXPERIMENTAL PROGRAM

Details the methodology, including the variables tested—specifically, the bed-joint mortar mixing ratio—and outlines the process of fabricating and testing thirty masonry wall panel specimens.

FAILURE MODES IDENTIFICATION

Describes the five observed failure modes in the tested panels: diagonal tension, combined failure, bed-joint sliding, toe crushing, and non-diagonal failure, explaining the characteristics of each.

SHEAR STRENGTH ANALYSI

Presents a detailed discussion on how shear strength varied with each identified failure mode and highlights the dependency of shear performance on the mode of failure.

COMPARATIVE EVALUATION WITH EXISTING CODES

Compares the experimental results with existing masonry design code provisions, particularly focusing on shear strength and shear modulus values.

PROPOSED DESIGN RECOMMENDATIONS

Based on findings, this section suggests shear strength values for each failure mode and proposes a revised shear modulus (half the current code value) for unreinforced concrete brick masonry panels.

CONCLUSION

Summarizes key findings, reinforcing the impact of failure mode on shear strength and the implications of the proposed values for future masonry design standards.

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