Modelling of load-displacement curves obtained from scaffold components tests

• Autorzy: Błazik-Borowa E. , Szer J. , Borowa A. , Robak A. , Pieńko M.

Identyfikatory

DOI

10.24425/bpas.2019.128602

• Języki publikacji: EN

Abstrakty

EN

The paper presents the modelling measurement results of the load-displacement relation for scaffold stands and bracings. In the case of stands, there are two sections of curves, i.e. a straight-line and curvilinear section, and in the case of bracings, two straight line sections as well as one curvilinear section are distinguished. As a result of analyses, it is concluded that the sections which can be approximated by means of linear functions should be distinguished in graphs, if possible. On the one hand, this results from the evaluation methods of scaffold components. Nevertheless, the determination of elastic-linear scope of components’ operation is useful in engineering practice during computer calculations. Moreover, the method of determining an intersection point between functions, approximating tests results, along with analysis of the impact of polynomial degree, approximating the research results, on the time and effectiveness of the process of approximating functions selection, are all demonstrated in this article. The proposed method can prove useful in all science fields where curves obtained from any research (laboratory test, in situ test, numerical analysis) require approximation or replacement with a simpler description.

Słowa kluczowe

EN

scaffolds; correlation functions; approximation of measurement results; elasticity

PL

rusztowania; funkcje korelacyjne; aproksymacja wyników pomiarów; elastyczność

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2019
• Tom: Vol. 67, nr 2
• Strony: 317--327
• Opis fizyczny: Bibliogr. 21 poz., rys., wykr., tab.

Twórcy

autor

Błazik-Borowa E.

• Lublin University of Technology, Faculty of Civil Engineering and Architecture, Nadbystrzycka 40 str., 20‑618 Lublin, Poland

autor

Szer J.

autor

Borowa A.

• Lublin University of Technology, Faculty of Civil Engineering and Architecture, Nadbystrzycka 40 str., 20‑618 Lublin, Poland

autor

Robak A.

• Lublin University of Technology, Faculty of Civil Engineering and Architecture, Nadbystrzycka 40 str., 20‑618 Lublin, Poland

autor

Pieńko M.

• Lublin University of Technology, Faculty of Civil Engineering and Architecture, Nadbystrzycka 40 str., 20‑618 Lublin, Poland

Bibliografia

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• [2] L. Czarnecki and J.J. Sokołowska, “Material model and revealing the truth”, Bull. Pol. Ac.: Tech 63 (1), 7‒14 (2016).
• [3] EN 12810‒2 2010 Facade scaffolds made of prefabricated components – Part 2: Particular methods of structural design.
• [4] EN 12811‒1 2007 Temporary works equipment – Part 1: Scaffolds – Performance requirements and general design.
• [5] EN 12811‒3 2003 Temporary works equipment – Part 3: Load testing.
• [6] M. Pieńko and E. Błazik-Borowa, “Numerical analysis of loadbearing capacity of modular scaffolding nodes”, Eng. Structure 48, 1‒9 (2013).
• [7] L. Jia, H. Liu, Z. Chen, Q. Liu, and S. Wen, “Mechanical properties of right-angle couplers in steel tube–coupler scaffolds”, J. of Constructional Steel Research 125, 43–60 (2016).
• [8] J.L. Peng, S.L. Chan, and C.L. Wu, “Effects of geometrical shape and incremental loads on scaffold systems”, J. of Constr. Steel Research 63, 448–459 (2007).
• [9] E. Błazik-Borowa and J.Gontarz, “The influence of the dimension and configuration of geometric imperfections on the static strength of a typical façade scaffolding”, Arch. of Civil and Mech. Eng. 16, 269‒28 (2016).
• [10] J.-L. Peng, C.-W. Wu, S.-L. Chan, and C.-H. Huang “Experimental and numerical studies of practical system scaffolds”, J. of Constr. Steel Research 91, 64–75 (2013).
• [11] W.K. Yu, K.F. Chung, and S.L. Chan, “Structural instability of multi-storey door-type modular steel scaffolds”, Eng. Structures 26, 867–881 (2004).
• [12] L.B. Weesner and H.L. Jones, “Experimental and analytical capacity of frame scaffolding”, Eng. Structures 23, 592–599 (2001).
• [13] A. Misztela, “Modeling the load characteristics for connections in scaffolds”, Przegląd Mechaniczny 5, 19‒26 (2011).
• [14] A. Misztela, “Influence of process parameters on the results of numerical analysis of nonlinear computational scaffolding International”, J. of Applied Mech. and Eng.17 (3), 931‒940 (2012).
• [15] U. Prabhakaran, R.G. Beale, and M.H.R. Godley, “Analysis of scaffolds with connections containing looseness”, Comp. and Structures 89 1944–1955 (2011).
• [16] E. Błazik-Borowa, A. Robak, and M.Pieńko, “The numerical analysis of the modular scaffold structure with the non-typical form”, J. of Civil Eng., Environment and Architecture 58 (3/11/II), 333‒340 (2011).
• [17] H. Liu, Q. Zhao, X. Wang, T. Zhou, D. Wang, J. Liu, and Z. Chen, ”Experimental and analytical studies on the stability of structural steel tube and coupler scaffolds without X-bracing”, Eng. Structures 32, 1003‒1015 (2010).
• [18] T. Chandrangsu and K.J.R. Rasmussen, “Structural modelling of support scaffold systems”, J. Constr. Steel Research 67, 866–875 (2011).
• [19] H. Zhang, T. Chandrangsu, and K.J.R. Rasmussen, “Probabilistic study of the strength of steel scaffold systems”, Structural Safety 32, 393–401 (2010).
• [20] H. Liu, L. Jia, S. Wen, Q. Liu, G. Wang, and Z. Chen, Experimental and theoretical studies on the stability of steel tube–coupler scaffolds with different connection joints”, Eng. Structures 106, 80–95 (2016).
• [21] E. Błazik-Borowa, M. Pieńko, A. Robak, A. Borowa, and P. Jamińska-Gadomska, “Analysis of ledger-stand joints in the aluminum modular scaffold”, Arch. of Civ. Eng. 63 (1), 17‒31 (2017).

Uwagi

EN

This work was financially supported by the statutory budget funds of the Faculty of Civil Engineering and Architecture of the Lublin University of Technology and of the Faculty of Civil Engineering of the Lodz University of Technology.

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).