Seismic Strengthening of URM Buildings with Steel Bracing

by Durgesh C. Rai, Univ of Michigan, Ann Arbor, United States,
Subhash C. Goel, Univ of Michigan, Ann Arbor, United States,
William T. Holmes, Univ of Michigan, Ann Arbor, United States,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

Unreinforced masonry (URM) buildings with large open fronts are extremely vulnerable to seismic inputs posing serious life safety hazard. Steel bracing systems have been used to upgrade such structures despite little or no experimental research. A half-scale model of a wall with openings isolated from a 'typical' building is tested under cyclic loading. It is strengthened by chevron steel braces in accordance with current UCBC. The shear resistance of the rocking wall piers increased manifold due to steel vertical members. Braces added to the shear resistance of wall while acting largely independent of the wall piers.

Subject Headings: Shear resistance | Steel structures | Shear walls | Shear strength | Bracing | Seismic tests | Masonry

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