The Effect of Infill Wall on Seismic Performance of Deficient RC Structures

Abstract eng:
This study investigates the possible adverse effects of the infill walls on the seismic response of the deficient reinforced concrete structures. It is shown herein that neglecting the presence of infill walls may not always a safe design approach. First the modeling approach is verified against available pseudo dynamic test results. Afterwards, the response of a 4-story 3-bay RC frame was examined with and without infill wall schemes. 7.14 magnitudes 1999 Duzce Earthquake was applied as the ground motion record in the nonlinear time history analyses. In order to simulate failure of infill walls accurately, element removal algorithm was employed in the middle bay of RC frame with strut and tie model. Analysis results indicated that, including infill walls with element removal algorithm led unsafe results in terms of inter-story drift ratio in first story and rotations at the critical plastic hinge location. As a result, neglecting infill wall contribution to the lateral stiffness and strength is not always a conservative design approach.

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