INVESTIGATION ON SEISMIC BEHAVIOR OF REINFORCED CONCRETE FRAMES WHOSE INFILL WALLS STRENGTHENED WITH PRECAST CONCRETE PANELS

Abstract

The strengthening of infill walls, a strengthening method for reinforced concrete buildings against earthquakes, can become an effective strengthening method when the number of members that should be repaired individually was high and the stiffness of the lateral load-carrying system was low. If the strengthening process performed by this method is projected with an appropriate analysis as required and the lateral stiffness of the building is increased by the aid of the infill wall behaving like a shear-walled frame, the strengthening other load-carrying members may not be required. In this study, three reinforced concrete frames having single-bay, two floors, ½ scale, brick-infill walls but insufficient strength and stiffness against earthquake were used for the tests. The brick infill walls of two frames were strengthened with precast high strength concrete panels and tested under lateral loads representing the seismic effect. The other frame was considered as the reference frame and tested without applying any strengthening process. The test results showed that the proposed strengthening method provided considerable increases in terms of lateral stiffness and strength.

Keywords

• Reinforced concerete frames, strengthening, infill walls, precast concrete panels, earthquake load,

DOLGU DUVARLARI ÖNÜRETYMLY BETON PANELLERLE GÜÇLENDYRYLMY? BETONARME ÇERÇEVELERYN DEPREM DAVRANI?ININ YNCELENMESY

Öz

Betonarme binalaryn depreme kar?y güçlendirme yöntemleri arasynda dolgu duvarlarynyn güçlendirilmesi, özellikle yapyda tek tek onarylmasy gereken eleman sayysynyn çok fazla olmasy ve ta?yyycy sistemin yanal rijitli?inin dü?ük olmasy halinde etkili güçlendirme yöntemi olabilmektedir. Bu ?ekilde yapylan bir güçlendirme, iyi bir analizle gerekti?i gibi projelendirilir ve in?a edilirse dolgulu çerçeve perde duvarly çerçeve gibi davranarak yapynyn yanal rijitli?ini artyrabilir ve böylece di?er ta?yyycy elemanlaryn takviye edilmesi gere?i ortadan kalkabilir. Bu çaly?mada, tek açyklykly, iki katly, 1/2 ölçekli, tu?la dolgu duvarly, depreme kar?y yeterli dayanym ve sünekli?i olmayan 3 adet betonarme çerçeveden biri referans numune olarak güçlendirme yapylmadan, di?er 2 tanesinin tu?la dolgu duvarlary ön üretimli yüksek dayanymly beton paneller ile güçlendirilerek depremi benze?tiren yanal yükler altynda davrany?lary incelenmi?tir. Deney sonuçlary, önerilen güçlendirme tekni?inin yanal rijitlik ve dayanymda dikkate de?er arty?lar sa?lady?yny göstermi?tir.

Anahtar Kelimeler

• Betonarme çerçeveler, güçlendirilme, dolgu duvarlar, ön üretimli paneller, deprem yükü,