Strengthening of existing RC buildings by using autoclaved aerated concrete infill wall

Abstract

The objective of this study is to use autoclaved aerated concrete (AAC) for infill walls in existing buildings that are unsafe for earthquakes to increase their stiffness. The study included two topics; the first topic introduced six models using AAC in buildings resistance to earthquakes and the effect of self-weight of the buildings comparing bare frame clay partition masonry model (1), bare frame AAC partition masonry model (2), reinforced concrete frames clay infill wall model ( 3), reinforcement concrete frames AAC infill wall model ( 4), reinforcement concrete frames AAC infill wall core model ( 5), reinforcement concrete frames AAC infill wall first and second floors model (6). ETABS software was used to investigate all frame models. Results of the study revealed that AAC infill wall decreases base moment, base shear and displacement. On the other hand, second topic presented five models of single reinforcement concrete frame under lateral loading, considering effect of anchored and unanchored AAC infill wall and clay infill wall. These models are bare frame model (a), RC frame with clay infill wall unanchored model (b), RC frame with AAC infill wall unanchored model (c), RC frame with clay infill wall with anchors model (d), RC frame with AAC infill wall with anchors model (e). Using finite element software (ANSYS WORKBENCH 18.2) failure load, displacement and ductility were presented for all five frames. The results showed that the 'RC frame with AAC infill wall with anchors' model gives the biggest failure load whereas displacement and ductility are the lowest.

An Art of Study on the Behaviour of Rc and Precast Concrete Frames With Infills Under Lateral Loading

“…From all the above research works, it is concluded that the RC frames increase their capacity to withhold lateral load which are infilled with AAC blocks [7]. The displacements of the RC and PC frames are reduced due to the instalment of masonry wall in the frames.…”

“…The integrated construction method shows better result than non-integrated method. The higher aspect ratio specimen (narrow wall panel) produced more ductility and plastic energy.Okasha et al [7] developed models such as bare RC frame, RC frame infilled with clay blocks with and without anchorage, RC frame infilled with AAC blocks with and without anchorage are tested for failure load, displacement and ductility using ANSYS WORKBENCH 18.2. The models are developed to resist earthquake load.…”

Poli vinil alkol (PVA) lif boyutunun çimento esaslı hafif harcın özelliklerine etkisi üzerine bir inceleme

“…Yapılarda normal ağırlıklı harçlar yerine hafif harçlar kullanarak daha düşük ölü yük ile daha fazla enerji sönümlenebilir. Bununla birlikte, binanın ısı yalıtımına katkı da sağlanarak binaların termal konfor özellikleri iyileştirilebilir, yangınlara karşı daha güvenlikli yapılar elde edebilir, aynı zamanda binalarda ses yalıtım özellikleri de iyileştirilerek daha konforlu yapılar tasarlanabilmektedir [3,4,5].…”