Optimisation of connector layout in timber-concrete composite structures

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Nyilvántartási szám: 
21/30
Témavezető neve: 
Témavezető e-mail címe:
logo.janos@emk.bme.hu
A témavezető teljes publikációs listája az MTMT-ben:
A téma rövid leírása, a kidolgozandó feladat részletezése: 
In search for a solution of a sustainable construction with less impact on environment while maintaining a sufficient structural performance, cross laminated timber and concrete composite slabs/beams have been increasingly proposed for medium-to-large span structures. Not only that the composite solution is stiffer and stronger than a timber equivalent, it is also associated with a substantially lower greenhouse gas emission. The advantages are so convincing that an increasing number of buildings are constructed adopting this technology, but because of the uncertainties and unknowns with a considerable premium.
The connection between the two materials is achieved in various ways. The most common are screw dowels, glued perforated plates and notches in the timber creating a concrete to timber bearing interface. Research has already been done towards creating a two-way spanning slabs by attaching the timber panels in the normally non-loadbearing direction. The performance of the system both in terms of stiffness and capacity, let alone the construction costs, depends largely on the method and layout of the connectors.
In this proposal the performance of various connection types shall be investigated by models, testing or a thorough investigation of literature in order to determine the base parameters for an optimization procedure. The objective of the research is to investigate the optimal layout and type of connectors to achieve an admissible, but minimum cost or a maximum achievable performance design.
The design parameters can be the type of connector and its dimensions, composition and the positions of the connectors. The dimensions and composition of the connectors can be handled separately adopting mesoscale FE models benchmarked to test available in literature. The relevant parameters (e.g. stiffness and capacity) obtained for the connectors can be used in a global analysis of building components e.g. flat slabs, ribbed slabs and other common structural types. Optionally the research can be extended to two-way spanning and indeterminate structures.
A téma meghatározó irodalma: 
[1] Jiang, Y., Crocetti, R., (2019). CLT-concrete composite floors with notched shear connectors. Construction and Building Materials, 195, 127-139.
[2] Fragiacomo, M.; Lukaszewska, E. Time-dependent behaviour of timber–concrete composite floors with
prefabricated concrete slabs. Eng. Struct. 2013, 52, 687–696. 
[3] Sanchez-Olivares G, Tomás A. Optimization of reinforced concrete sections under compression and biaxial bending by using a parallel firefly algorithm. Applied Sciences. 2021, 11(5): 1-22. https://doi.org/10.3390/app11052076. 
[4] Mai, K.Q.; Park, A.; Lee, K. Experimental and numerical performance of shear connections in CLT–concrete composite floor. Mater. Struct. 2018, 51, 84. 
[5]  Yang, Y and Shu, J and Zhao, W and Orr, J.  Shear design method for non-prismatic concrete beams reinforced using W-FRP. Structures, 30, 2021,  667-677. https://doi.org/10.1016/j.istruc.2021.01.028
A téma hazai és nemzetközi folyóiratai: 
1. ADVANCES IN ENGINEERING SOFTWARE 
2. COMPUTERS & STRUCTURES
3. STRUCTURES
4. STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
5. PERIODICA POLYTECHNICA-CIVIL ENGINEERING
6. MATERIALS AND STRUCTURES
7. CONSTRUCTION AND BUILDING MATERIALS
8. MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
A témavezető utóbbi tíz évben megjelent 5 legfontosabb publikációja: 
1. Tauzowski, P. ; Blachowski, B. ; Lógó, J.
Functor-oriented topology optimization of elasto-plastic structures
ADVANCES IN ENGINEERING SOFTWARE 135  Paper: 102690 , 11 p. (2019)
2. Tauzowski, Piotr ; Blachowski, Bartlomiej ; Lógó, János Topology optimization of elasto-plastic structures under reliability constraints: A first order approach COMPUTERS & STRUCTURES 243 Paper: 106406 (2021) 
DOI WoS Scopus
3. János, Lógó ; Bence, Balogh ; Erika, Pintér
Topology Optimization Considering Multiple Loading
COMPUTERS & STRUCTURES 207 pp. 233-244. , 12 p. (2018)
DOI Scopus WoS
4. Bence, Balogh ; János, Lógó
The application of drilling degree of freedom to checkerboards in structural topology optimization
ADVANCES IN ENGINEERING SOFTWARE 107 pp. 7-12. , 6 p. (2017)  DOI WoS Scopus
5. Blachowski, B. , Tauzowski, P. ; Lógó, J. Yield Limited Optimal Topology Design of Elasto-Plastic Structures
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION 61:5,1953-1976 (2020) DOI WoS Scopus
A témavezető fenti folyóiratokban megjelent 5 közleménye: 
1. Movahedi Rad, Majid ; Habashneh, Muayad ; Lógó, János
Elasto-Plastic limit analysis of reliability based geometrically nonlinear bi-directional evolutionary topology optimization
STRUCTURES 34 pp. 1720-1733. , 14 p. (2021)
2. János, Lógó ; Bence, Balogh ; Erika, Pintér
Topology Optimization Considering Multiple Loading
COMPUTERS & STRUCTURES 207 pp. 233-244. , 12 p. (2018)
3. Blachowski, B. , Tauzowski, P. ; Lógó, J.
Yield Limited Optimal Topology Design of Elasto-Plastic Structures
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION 61:5,1953-1976 (2020) 
4. Logo, J
New type of optimality criteria method in case of probabilistic loading conditions
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES 35 : 2 pp. 147-162. , 16 p. (2007)
5. Pintér, Erika ; Lengyel, András ; Lógó, János
Structural Topology Optimization with Stress Constraint Considering Loading Uncertainties
PERIODICA POLYTECHNICA-CIVIL ENGINEERING 59 : 4 pp. 559-565. , 7 p. (2015)
Hallgató: 

A témavezető eddigi doktoranduszai

Balogh Bence (2014/2017/)
Pintér Erika (2012/2015/2019)
Merczel Dániel Balázs (2010/2013/2015)
Mohsen Ghaemi (2003//2010)
Movahedi Rad Majid (2007//2011)
Ismail Hussein (2020/2024/2024)
Tóth Bálint (2023//)
Státusz: 
elfogadott