Nyilvántartási szám:
22/31
Témavezető neve:
Témavezető e-mail címe:
volgyi.istvan@emk.bme.hu
A témavezető teljes publikációs listája az MTMT-ben:
A téma rövid leírása, a kidolgozandó feladat részletezése:
Precast concrete and prestressed concrete structures are widely used nowadays, since the erection time of the structures is more and more important. The joints of this structures have essential role in the construction, this is why the precast concrete companies have special focus on the development of them.
Concerning to precast reinforced concrete beams endplate type connecting elements are developed to create moment resisting joints e.g. by Peikko Copra company. These special plates are embedded in the beam elements to be connected and the two sides of the bolted connection are created by concreting the gap between the beams.
The normal force resistance of the coupling elements was confirmed by previous experimental tests. In some applications, the stability resistances of the structure applying connected elements is also determined. The resulting imperfections of the whole structure and the stiffness of that are the key parameters regarding the buckling resistance. Both can be significantly affected by the details of the connecting elements.
The governing parameters for stiffness are the relative angle of the elements on both sides of the joint, the tightening torque of the nut and the angular imperfection between the RC elements. The differences between the planned and the executed static scheme and the angular imperfection of the Peikko Copra connection results in loss of stiffness first of all in the initial phase of behaviour.
The tasks in the preliminary part of the research programme are as follows:
• to determine the installation tolerance,
• to define the proposed tightening torque,
• to determine the ideal initial stiffness of the connection,
• to determine the relationship between the installation angle error and the contact stiffness characteristics,
• to develop a method for measuring the installation angle error before and after concreting.
On these bases an experimental research programme is to be completed with the following details:
• Development of a tool to determine the installation imperfection.
• Testing the connected elements and determination of the appropriate tightening torque and tensile force for different values of angular imperfection.
• Testing of installed connecting elements.
• Experimental testing of a beams with imperfect joint details.
Applying the experimental background the aim of the theoretical research programme is to determine the effect of imperfections of the joint stiffness and resistance for different types of structures. By this the practical design can be supported by proper modelling methodology and design characteristics.
A téma meghatározó irodalma:
1. Y. Zhang et al: Flexural behavior of precast UHPC beam with prestressed bolted hybrid joint. Engineering Structures (2020)
2. J. Liu et al: Experimental investigation on seismic performance of mechanical joints with bolted flange plate for precast concrete column. Engineering Structures (2020)
3. Zhu et al: Finite element analysis of flexural behavior of precast segmental UHPC beams with prestressed bolted hybrid joints. Engineering Structures (2021)
4. Ding et al: Seismic performance of precast concrete beam-column joint based on the bolt connection. Engineering Structures (2021)
5. Stratford; Burgoyne: Lateral stability of long precast concrete beams. Structures and Buildings (1999)
6. Burgoyne C. J.; Stratford T. J.: Lateral instability of long-span prestressed concrete beams on flexible bearings. Structural Engineers (2001)
7. Vidigal De Lima; Debs: Numerical and experimental analysis of lateral stability in precast concrete beams. Magazine of Concrete Research (2005.)
8. Hurff; Kahn: Lateral-Torsional Buckling of Structural Concrete Beams: Experimental and Analytical Study. Journal of Structural Engineering (2012)
9. Lee; Kalkan: Experimental and analytical investigation of lateral-torsional buckling of RC beams with geometric imperfections. Applied Mechanics and Materials (2014)
10. Kalkan et al: Lateral stability of reinforced-concrete beams with initial imperfections. Journal of the Institution of Civil Engineers (2016)
A téma hazai és nemzetközi folyóiratai:
1. ACI Structural Journal
2. PCI Journal
3. Periodica Polytechnica
4. Structural Concrete
5. Vasbetonépítés
A témavezető utóbbi tíz évben megjelent 5 legfontosabb publikációja:
1. Szabó G; Völgyi I.; Kenéz Á.: Vibration Assessment of a New Danube Bridge at Komárom. Periodica Polytechnica – Civil Engineering; 66: 4 pp. 1014-1022. (2022)
2. Kollár D.; Kövesdi B.; Völgyi I.; Biró I.: Assessment of deformation in bridge bearing areas using measurements and welding simulation. Journal of Constructional Steel Research; 194 Paper: 107305 (2022)
3. Völgyi I.; Windisch A.: Experimental investigation of the role of aggregate interlock in the shear resistance of reinforced concrete beams. Structutal Concrete; 18 : 5 pp. 792- (2017)
4. Völgyi I.; Windisch A.: Resistance of reinforced concrete members with hollow circular cross-sections under combined bending and shear - Part II: New calculation model. Structutal Concrete; 15: 1 pp. 21-29. (2014)
5. Völgyi I.; Windisch A.; Farkas Gy.: Resistance of reinforced concrete members with hollow circular cross-section under combined bending and shear – Part I: experimental investigation. Structural Concrete; 15 : 1 pp. 13-20 (2014)
A témavezető fenti folyóiratokban megjelent 5 közleménye:
1. Jobbágy D.; Völgyi I.: Vasbeton lemezek átszúródási méretezésének változása napjainkban - 2. rész: Átszúródási csapok méretezése az európai műszaki engedélyek szerint. Vasbetonépítés; 3 pp. 66-72. (2020)
2. Völgyi I ; Windisch A.: Experimental investigation of the role of aggregate interlock in the shear resistance of reinforced concrete beams. Structural Concrete; 18 : 5 pp. 792-800 (2017)
3. Völgyi I; Windisch A.: Resistance of reinforced concrete members with hollow circular cross-sections under combined bending and shear - Part II: New calculation model. Structural Concrete; 15: 1 pp. 21-29. (2014)
4. Völgyi I.; Windisch A.; Farkas, Gy.: Resistance of reinforced concrete members with hollow circular cross-section under combined bending and shear – Part I: experimental investigation. Structural Concrete; 15: 1 pp. 13-20. (2014)
5. Völgyi I.; Farkas Gy.: Rebound testing of cylindrical spun-cast concrete elements. Periodica Polytechnica – Civil Engineering; 55 : 2 pp. 129-135.(2011)
A témavezető eddigi doktoranduszai
Zaheraldeen Hayyan (2020//)
Státusz:
elfogadott