Cyclic Behavior of Composite Truss Beam-to-RC Column Joints in MRFS

Abstract:

In the present paper, the cyclic behavior of beam-to-column joints made up of Hybrid Steel Trussed Concrete Beams (HSTCBs) connected to Reinforced Concrete (RC) piers is investigated. HSTCBs are a typology of composite beam generally constituted by a steel truss with end zone added rebars embedded within a block of concrete cast in place. HSTCBs represent a structural solution for light industrialization in the civil constructions; the main advantages in their use are the higher construction speed with the minimum site labor, the possibility of covering wide spans with low depths and a final economical convenience. For these reasons, they are also increasingly adopted within seismic framed structures. In the present study, the examined joints are representative of framed RC structures subjected to seismic actions and designed according to the current Italian standard code. Cyclic tests are performed and interpreted by means of analytical and numerical models with the aim of verifying the strength capacity and ductility of the system, focusing on both the global behavior and the force transmission between steel truss and concrete in the joint region.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 681-689
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.681
• Online since: September 2016
• Authors: Piero Colajanni, Lidia La Mendola, Alessia Monaco*, Nino Spinella
• Keywords: Beam-to-Column Joint, Composite Truss Beam, Cyclic Tests, Seismic Performance

References

[1] P. Colajanni, L. La Mendola, and A. Monaco. Analisi sperimentale del comportamento ciclico di nodi di travi SER e pilastri in c. a. (Experimental analysis of the cyclic behavior of SER beam-to-R.C. column joints). Proc. of 19th C.T.E. congress, Bologna (Italy), November 8-10, 2012, pp.171-180.

[2] D. M. LL. PP. Norme Tecniche per le Costruzioni (Construction Technical Codes). Gazzetta Ufficiale, 14th Jan 2008 (in Italian).

[3] PG. Bakir, and HM. Boduroglu. A new design equation for predicting the joint shear strength of monotonically loaded exterior beam-to-column joints. Eng Struct, 24: 1105–1117, (2002).

DOI: 10.1016/s0141-0296(02)00038-x

[4] G. Russo, G. Somma. Shear strength of exterior beam-column joints under seismic loading. Fib-Federation Internationale du Beton. Proc. of 2nd International Congress, Naples, Italy, (2006).

[5] J. Kim, J.M. La Fave. Joint shear behaviour of reinforced concrete beam-column connections subjected to seismic lateral loading. Newmark Structural Engineering Laboratory—NSEL Report Series, NSEL-020, (2009).

[6] S.J. Hwang, H.J. Lee, Strength prediction for discontinuity regions by softened strut-and-tie model. Journal of Structural Engineer, 128(12): 1519-1526, (2002).

DOI: 10.1061/(asce)0733-9445(2002)128:12(1519)

[7] J. Kim, J.M. La Fave , J. Song, Joint shear behaviour of reinforced concrete beam-column connections. Magazine of Concrete Research, 61(2): 119-132, (2009).

DOI: 10.1680/macr.2008.00068

[8] C. Lima, E. Martinelli, C. Faella, Capacity models for shear strength of exterior joints in RC frames: state-of-the-art and synoptic examination. Bulletin of Earthquake Engineering, 10(3): 967-983, (2012).

DOI: 10.1007/s10518-012-9340-4