Evaluation and Comparison of Seismic Performance of Structural Trusses under Cyclic Loading with Finite Element Method

Authors: Masoud Mahdavi

Abstract:

The structure is made using different members and combining them with each other. These members are basically based on technical and engineering principles and are combined in different ways and have their own unique effects on the building. Trusses are one of the most common and important members of the structure, accounting for a large percentage of the power transmission structure in the building. Different types of trusses are based on structural needs and evaluating and making complete comparisons between them is one of the most important engineering analyses. In the present study, four types of trusses have been studied; 1) Hawe truss, 2) Pratt truss, 3) k truss, and 4) warren truss, under cyclic loading for 80 seconds. The trusses are modeled in 3d using st₃₇ steel. The results showed that Hawe trusses had higher values ​​than all other trusses (k, Pratt and Warren) in all the studied indicators. Indicators examined in the study include; 1) von Mises stresses, 2) displacement, 3) support force, 4) velocity, 5) acceleration, 6) capacity (hysteresis curve) and 7) energy diagram. Pratt truss in indicators; Mises stress, displacement, energy have the least amount compared to other trusses. K truss in indicators; support force, speed and acceleration are the lowest compared to other trusses.

Keywords: Hawe truss, Pratt truss, K truss, Warren truss, cyclic loading, finite element method.

References:

[1] J.Hermida, M.Cabaleiro, B .Riveiro, J.C.Caamano, “Two-dimensional models of variable inertia from LiDAR data for structural analysis of timber trusses”, Construction and Building Materials 231 (2020) 117072, 2020.
[2] Ch. J. Hunt, M. R.Wisnom, B. K. S. Woods, “WrapToR composite truss structures: Improved process and structural efficiency”, Composite Structures, Volume 230, 111467, 2019.
[3] Zh. Tian, Y. Liu, L. Jiang, W. Zhu, Y. Ma, 2019, “A review on application of composite truss bridges composed of hollow structural section members”, Journal of Traffic and Transportation Engineering (English Edition), Volume 6, Issue 1, February 2019, Pages 94-108, 2019.
[4] F. Lianto, R. Trisno, S. W. The, “The truss structure system”, International Journal of Civil Engineering and Technology (IJCIET), Volume 9, Issue 11, November 2018, pp. 2460–2469, 2018.
[5] A.Jayaraman, R Geethamani, N Sathyakumar, N Karthiga Shenbagam, “Design and Economical of Roof Trusses & Purlins (Comparison Of Limit State and Working Stress Method) ”, International Journal of Research in Engineering and Technology, Volume: 03 Issue 10, 2014.