Behaviour and design of innovative steel frames with RC infill walls

In this work steel frames with reinforced concrete infill walls (SRCWs) are considered, limitations of designs following current code recommendations are discussed, an alternative capacity design approach for innovative SRCWs is illustrated and evaluated. The innovative SRCW system is conceived to ensure the formation of diagonal struts in the infill walls by eliminating the connectors between wall and vertical columns and by placing stiffeners and bearing plates in the joints. In this way the hybrid system behaves as a latticed brace instead of a shear wall and energy dissipation takes place mainly in the vertical steel elements without involving the reinforcements of the infill walls. This study is part of a research project named INNO-HYCO (INNOvative HYbrid and COmposite steel-concrete structural solutions for building in seismic area) funded by the European Commission

A-State-Of-The-Art review on modular building connections

Modular Building System (MBS) is an emerging offsite construction technique, which uses prefabricated units, transported, and assembled onsite. In MBS construction process, designing stage is considered as the most significant stage. One of the critical concerns in designing MBSs is to maintain and to ensure the structural integrity of the assembly against critical loading conditions. Connections in the MBSs as a crucial part of the off-site construction, plays a prominent role in providing the essential performance and integrity for the assembled MBS. Hence, it is indispensable to analyse the existing connections used in industry and to investigate the benefits and limitations of their application in MBS construction. A thorough study on connection types will evaluate their capabilities in addressing functional requirements and will exhibit their potential to serve as a benchmark for a range of future modular construction techniques. Thus, this paper presents a review on various forms of inter-modular connection systems used in the contemporary construction industry. It covers the role of connections in the automation of assembly and disassembly of modular units; architectural, structural, and constructional challenges faced by the industry in using them; and their performance under different loading conditions. In addition, numerical studies performed on a selected intermodular connection model is also presented, investigating, and validating the mechanical behaviour of connection and justifying the applicability of such models in predicting connection behaviour. Finally, based on the review, suggestions to address modern construction obstacles by adding new information to the literature and then to overcome challenges in the wide adoption of the MBS in construction industry are presented. The outcome of this study assists in overcoming obstacles and encourages potential growth of MBS and/or off-site construction techniques in building construction industry

HITUBES PROJECT DESIGN AND INTEGRITY ASSESSMENT OF HIGH STRENGTH TUBULAR STRUCTURES FOR EXTREME LOADING CONDITIONS - D4

D4.1: Materials and fracture-mechanic properties including loading rate and corrosion D4.2: Test data on welded tubular connections D4.3: Performance of advanced post-treatment welding techniques D4.4: Test data on bolted tubular connection

ATTEL PROJECT PERFORMANCE‐BASED APPROACHES FOR HIGH STRENGTH TUBULAR COLUMNS AND CONNECTIONS UNDER EARTHQUAKE AND FIRE LOADINGS - D2

D2.1: Report on the design of specimens D2.2: Definition of practical solutions for the selected typologies of column bases, of HSSCHS columns and HSS‐CFT columns and of HSS‐concrete composite beam‐to‐column joint