PERFORMANCE OF AUTOCLAVED AERATED CONCRETE INFILL WALLS UNDER IN-PLANE AND OUT-OF-PLANE SEISMIC DEMANDS

Date

2023-9-11

Author

Yılmaztürk, Sema Melek

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According to past studies, it is observed that infill walls increase the lateral stiffness and strength of the frame under earthquakes with low intensities causing in-plane (IP) loading. However, the combined effect of IP and out-of-plane (OOP) excitations can lead to the premature failure of infill walls. Autoclaved aerated concrete (AAC) is a lightweight, precast building material made from natural raw materials such as sand, cement, lime, and water. It is known for its excellent thermal insulation properties, high load-bearing capacity, and fire resistance. AAC is a relatively newer material compared to traditional masonry; therefore, there are fewer studies on the seismic performance of AAC-infilled reinforced concrete (RC) frames until recent years. This study investigates the performance of an insulated wall system made of AAC blocks and thermal insulation plates. This system aims to create monolithic, mineral-based, non-combustible facades that can easily meet the regulations and standards. Two types of walls are prepared, and experiments are conducted in the laboratory under different loadings. The objective of the study is to understand the behavior of these insulated walls (single cross-section wall system) under the combined effect of in-plane and out-of-plane loads during earthquakes. Additionally, it was aimed to assess the in-plane drift capacity of AAC infill walls under the influence of out-of-plane loads and develop a model to estimate the drift ratio of AAC infill walls under combined in-plane and out-of-plane demands. Total of eight tests are conducted for the insulated wall system. The behavior of the insulated wall system is found to be similar to other infill wall types. The main contribution to literature is to show the performance of an insulated wall system with AAC infill walls under seismic forces. It was observed that the combined in-plane and out-ofplane loading causes a reduction in the displacement capacities and drift ratios.

Subject Keywords

AAC infill wall, in-plane behavior, out-of-plane behavior, combined IP and OOP effect, experimental test

URI

https://hdl.handle.net/11511/105588

Collections

Graduate School of Natural and Applied Sciences, Thesis