Dr Farzad (Fred) Moshiri received his B.E. degree in Civil Engineering in 2006, and the MSc. Degree in Timber Engineering from the Linnaeus University, Sweden, in 2009. He has more than 7 years of experience in design and construction management of different projects with exposure to analysis, design and project planning of reinforced concrete, steel and timber buildings. He has been working for the Timber Development Association of NSW as a Structural Engineer and R&D associate since late 2014.
In 2010, he migrated to Australia to pursue his PhD at the University of Technology, Sydney under the supervision of Prof. Keith Crews. His PhD funded by Structural Timber Innovation Company, focused on the structural behaviour of timber concrete composite connections and floors to enable timber composite floor to compete more effectively in the building and construction market. He received his PhD from UTS in 2015 and has been actively involved in research on timber, timber-concrete composites and engineering education.
Fred is the author of more than 12 technical journal and conference papers in the fields of Structural Engineering and Engineering Education and is a reviewer for the Journal of Civil Engineering and Architecture in the United States. He is a Civil/Structural Branch member member of Engineers Australia and Concrete Institute of Australia. He is also a member of American Society of Civil Engineers and American Concrete Institution Committee 335, composite structure.
Timber concrete composite construction
Dynamic response and behavior of masonry and timber structure
Non-linear finite element analyses
Application of modal analysis in Strength grading of Timber
Steel and Timber Designs
Moshiri, F, Shrestha, R & Crews, K 2014, 'The Predictive Model for Stiffness of Inclined Screws as Shear Connection in Timber-Concrete Composite Floor' in Aicher, S, Reinhardt, HW & Garrecht, H (eds), Materials and Joints in Timber Structures, Springer, Germany, pp. 443-453.View/Download from: Publisher's site
Interest in timber-concrete composite (TCC) floors has increased over the last 30 years. TCC technology relies on timber and concrete members acting compositely together. Both timber and concrete exhibit a brittle behaviour in bending/tension and compression respectively whilst the shear connection is identified as the only contributor of ductile behaviour. Therefore, the strength, stiffness and arrangement of the shear connection play a crucial role in the design parameters of TCC system including deflection and stiffness of floor. Hence, calculation of stiffness is of interest to study the structural performance of TCC floor. Material properties of timber, fastener and concrete influence the overall load-displacement response of shear connection. There are only few investigations on analytical closed-form equation to predict the stiffness and strength of TCC joints as input values to design a partially composite floor. For example, Eurocode 5 recommends the empirical equations for the slip modulus of dowels and screws which are limited to vertically inserted fasteners only. Eurocode 5 only recommends that the strength and stiffness of unconventional joints should be determined by push-out tests. Previous investigations reported that the inclination of a fastener significantly increase the initial stiffness and ultimate strength of the TCC joints and consequently composite floor. This paper presents a model for prediction of the stiffness of TCC joint using crossed inclined proprietary screws (SFS Intec). The model assumes the behaviour of inclined screw as a beam on a two-dimensional elastic foundation, and considers the timber as the elastic foundation consisting of orthogonal springs with differing stiffness in the parallel and transverse to the grain directions. The experimental aspect of the research consists of embedding and push-out tests aiming to verify the stiffness model of TCC joints with inclined screws. The model is reasonably accurate in predictin...
Moshiri, F, Shrestha, R & Crews, K 2013, 'Predictive Models for the Stiffness of Vertical Screws as Shear Connection in Timber-Concrete Composite Floors', Composite Construction in Steel and Concrete VII - Proceedings of the 2013 International Conference on Composite Construction in Steel and Concrete, International Conference on Composite Construction in Steel and Concrete, ASCE, Palm Cove, Australia, pp. 661-675.View/Download from: Publisher's site
© ASCE. The stiffness, strength, and arrangement of the shear connection play a crucial role in the design of timber-concrete composite (TCC). This paper reviews the available analytical models for prediction of the stiffness of TCC shear connections. The methodology of different analytical models for stiffness of the mechanical fastener TCC connection is discussed and the accuracy of these models is examined based on push out test results for shear connectors. The simplified stiffness models underestimated the experimental data of normal wood screw with an error ranging approximately 10-40%, whereas the models based on Winkler's theory were inaccurate and calculated a much lower stiffness compared to that of experimental test with an error of approximately 60%. The reasons attributed to inaccuracy of the stiffness models are described. This paper recommends further investigation on the prediction of foundation moduli of timber and concrete as the main input parameters of the models based on the Winkler's theory.
Moshiri, F, Gardner, AP, Erkmen, E, Jarman, R & Khabbaz, H 2014, 'Enhancing Industry Exposure, Discovery-Based and CooperativeLearning in Mechanics of Solids', Australasian Association for Engineering Education Annual Conference 2014, School of Engineering & Advanced Technology, Massey University, Turitea Campus, Palmerston North 4442, Wellington, NZ.
Mechanics of Solids is a second year undergraduate subject, undertaken by both Civil and Mechanical engineering students at the University of Technology, Sydney (UTS). Mechanics of Solids has been delivered for many years in a traditional format with lectures and problem solving tutorials. As part of a national Australian project "Enhancing Industry Exposure in Engineering Degrees", UTS in partnership with other universities and industry partners in Australia has sought industry involvement to engage students with the real-world challenges of engineering practice.
The main objective of this project is to design, develop and implement learning modules in Mechanis of Solids that integrate industry exposure to provide context for the concepts included in this subject.
The project consisted of six guest lectures by industry representatives on topics related to typical Mechanics of Solids subject matter and two seminars on using MDSolids software.
Students completed a collaborative assignment aligned with one of the industry presentations. Their reports and presentations were assessed on assessment criteria which included contextual understanding, judgement, effective collaboration and creativity, and their perceptions were captured to evaluate the impact of industry engagement in this subject.
One of the major benefits of this project was students' better understanding of engineering practice. There were also positive effects on students' motivation for learning engineering.
This paper reports the major findings, outcomes and challenges for implementing enhancing industry exposure approach in Mechanics of Solids subject at UTS. The main finding of this research concluded that this project is very valuable to both students as it promotes exposure to real-world engineering challenges. The students' exposure to real and substantive challenges improves their contextual understanding, plus their judgement, practice ...
Moshiri, F, Gerber, C, Valipour Goudarzi, H, Shrestha, R & Crews, KI 2012, 'The predictive model for strength of inclined screws as shear connection in timber-concrete composite floor', From Materials to Structures: Advancement through Innovation - PROCEEDINGS OF THE 22ND AUSTRALASIAN CONFERENCE ON THE MECHANICS OF STRUCTURES AND MATERIALS, Australasian Conference on the Mechanics of Structures and Materials, CRC PRESS / BALKEMA, SYDNEY, AUSTRALIA, pp. 1059-1064.
Interest in timber-concrete composite (TCC) floors has increased over the last 30 years. TCC technology relies on timber and concrete members acting compositely together. Both timber and concrete exhibit a quite brittle behaviour in bending/tension and compression respectively whilst the shear connection is identified as the only contributor of ductile behaviour. Therefore, the strength, stiffness and arrangement of the shear connection play a crucial role in the structural design of TCC. There are only few investigations on analytical closed-form equation to predict the stiffness and strength of TCC joints as input values to design a partially composite floor. For example, Johansenâs yield theory was adopted as European yield model in Eurocode 5. However, the equations are limited to vertically inserted dowels or screws and Eurocode 5 recommends that the strength and stiffness of unconventional joints should be determined by push-out tests. Previous investigations reported that the inclined shear connector significantly increase the initial stiffness and ultimate strength of the TCC joints and consequently composite floor. This paper presents a model for the strength ofTCC joint using crossed (Â±45â¦) proprietary screws (SFS Intec). The Johansen yield theory is extended to derive the strenght model of TCC joint with crossed (Â±45â¦) screws which are loaded in tension and compression. The model is an upper bound plastic collapse model that assumes the behaviour of timber and screw perfectly plastic with undamaged concrete. The failure modes considers of yield of screw, in tension or shear, and some combined modes assuming screw withdrawal, lateral crushing of the timber and the development of plastic hinges in the screw. The experimental aspect of the research consists of push-out tests and aims to verify the strength model of TCC joints with inclined screws. The failure modes are also investigated. The model seems to be reasonably accurate in predicting both the...
Moshiri, F, Crews, KI, Gerber, C, Valipour Goudarzi, HS & garven c, R 2012, 'AN INVESTIGATION ON TCC JOINTS USING EXPANDED POLYSTYRENE LIGHT-WEIGHT CONCRETE', World Conference on Timber Engineering (WCTE 2012), Curran association, Auckland, New Zealand, pp. 201-202.
Moshiri, F, Gerber, C & Crews, KI 2011, 'State of the art on Timber Concrete Composite floor', Concrete 2011 Building a Sustainable Future, Concrete Institute of Australia - Biennial Conference, The Concrete Institute of Australia, Perth, Australia, pp. 1-12.
Interest in timber-concrete composite (TCC) floors has increased over the last 20-30 years. Since the 1990âs, TCC solution is seen as a viable and effective alternative to conventional reinforced concrete and/or traditional timber floors in multistorey buildings. In TCC technology, a timber beam, either solid wood, glued laminated or laminated veneer lumber (LVL), is connected to a concrete slab using a connection system that resists shear forces and impedes slip between the members of the composite section. The strength, stiffness, location and number of connectors play a crucial role for the composite action and determine the structural and serviceability performance of the floor system. This paper discusses the state of the art of TCC structures. It presents a comprehensive review of the literature about the development and structural behaviour of TCC structures. The review addresses construction aspects and shear connection concepts. It evaluates experimental tests, finite element and numerical models. It discusses the influence of concrete elements. As recommendations, the best types of shear connection for cast in-situ and prefabricated TCC floors are put forward and assessed for criteria such as strength, stiffness, ductility and ease of manufacturing. Furthermore the most relevant numerical models are introduced. These models can be used to further the experimental results in parameters such as connections, configurations, geometrical and material properties.