An Evaluation of Unreinforced Masonry Wall Performance

by J.D. Raggett and C. Rojahn

Raggett, J.D. and C. Rojahn (1990). An Evaluation of Unreinforced Masonry Wall Performance. SMIP 1990 Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data, p. 4-1 - 4-21.

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The objective of this study is to evaluate the assumption that there is no amplification of ground motion at the top of unreinforced masonry walls. Strong-motion records at the top and bottom of shear walls for one unreinforced masonry building, and four reinforced concrete buildings were analyzed. Accelerations at the top of reinforced concrete shear walls typically did not exceed 1.31 times ground accelerations. The unreinforced masonry building was damaged during the motions analyzed making results unreliable for predicting future motions.