Ductility of Reinforced Concrete Sub Frame for Industrialized Building System

Abstract

An accurate determination of industrialized building system (IBS) frames ductility under alternating lateral loads is the key issue of this study. The performance features of IBS H frame assembly subjected to cyclic lateral pushover test with six attached IBS components are reported. A test scheme of nonlinear elastic sub-frame system is proposed to build an IBS structural building system. This system complies with the requirements of strength and ductility governed by European Codes 2 and 8. The three models are a conventional reinforced concrete H frame system CRCH (Model 1), IBS with steel conventional links as reinforcements IBSHN (Model 2), and special spiral links concrete IBSHS (Model 3). Each model is scaled to 1:5. All models are laboratory examined under cyclic lateral pushover test to failure, where the IBS connections are considered as hybrid partial rigid linking beams to columns. The beam ends are connected to column boxes via a U shaped steel plate. The experimental results of the IBS specimens are compared with the conventional reinforced concrete connection of similar shapes and size in the form of H sub-frame mechanism tested under the same condition. The models are subjected to cyclic lateral load controlled applied at the beam-column connection. The performance evaluation of IBS connections is made via load displacement hysteresis, ultimate and collapse parameter, ductility index, and surface cracks appearances. The conventional concrete specimen is obviously found to display better strength compared to IBS. Conversely, the ductility of IBS H frame specimen with spiral shear links and conventional closed loop links exhibits superior features compared to the conventional concrete specimen which is beneficial to earthquake engineering. It is demonstrated that the performance of the precast concrete structure is highly dependent on the ductile capacity of connectors to each of the IBS component. This is significant especially at the joints such as the beam-to-column connections. Our systematic methods on ductility characterizations of reinforced concrete beams may contribute toward the development of IBS in resisting earthquakes.

A thematic Review on Industrialised Building System (IBS) Publications from 2015-2019: Analysis of Patterns and Trends for Future Studies of IBS in Malaysia

“…Ismail (2017) proposed I-CMMS for the maintenance of the IBS building. In 2019, Aljawadi et al (2019), focused their publication on the test scheme of nonlinear elastic sub-frame systems to build an IBS structural building system. Previously, Mohammad et al (2016), highlighted the high investment in the IBS technical and maintenance remained the main obstacles in the implementation of IBS in Malaysia.…”

Factors Influencing Industrialized Building System (IBS) Project Performance: A Systematic Review

“…Lack of knowledge and expertise within the area of IBS construction can lead to financial problems pertaining to construction cost (Abas et al, 2014;Kamar et al, 2012;Tamrin et al, 2016;Zakari et al, 2017). To realize the ideal way of utilizing IBS to its maximum advantage is through educating architects and engineers in a systematic way to integrate design, technology, management, economics, as well as marketing (Aljawadi et al, 2019). in their study showed that most of the architects and engineers are still unaware of the basic design process to fabricate, connect, and install the elements of IBS in Malaysia.…”

Factors Influencing Industrialized Building System (IBS) Project Performance: A Systematic Review

“…Process integration: IBS is an integrated process involving all subsystems, components, manufacturing and construction processes, and which all requires efficient management (Jabar et al, 2019). Design, production, and onsite erection are strongly interrelated which can be viewed as part of an integrated process that requires planning and coordination (Aljawadi et al, 2019). Integration processes across the whole project must undergo certain level of assessment in order for contractor to achieve high level of efficiency and synergy between processes as well as to avoid future unnecessary costs.…”