Experimental testing of joints for seismic design of lightweight structures. Part 1: screwed joints in straps

Author (s): Casafont, M., Arnedo, A., Roure, F. and Rodríguez-Ferran, A.
Journal: Thin-Walled Structures

Volume: 44, Issue 2
Pages: 131 – 270
Date: 2006

Connections in x-braced shear walls play a crucial role in the seismic performance
of lightweight structures: they should be strong enough to allow energy dissipation
via plastification of the diagonal straps. An extensive experimental research
on tensile screwed joints between straps is reported here. Two dominant failure
modes are identified: (1) tilting and net section failure (T+NSF) and (2) tilting,
bearing and pull out (T+B+PO). The analysis in terms of strength and ductility
shows that T+NSF joints are suitable for seismic design, because the straps yield
before the connections fail. T+B+PO joints, on the contrary, are not suited because
the connection fails before the straps can yield. The influence of various design
parameters (strap thickness, number and diameter of screws, steel grade) in the
failure mode is studied, and design criteria to induce a T+NSF response are given.



author = "Casafont, M.; Arnedo, A.; Roure, F. and Rodríguez-Ferran, A.“,
title = "Experimental testing of joints for seismic design of lightweight structures. Part 1. Screwed joints in straps ",
journal = "Thin-Walled Structures ",
volume = "44",
number = "2",
pages = "197 - 210",
year = "2006",
note = "",
issn = "0263-8231",
doi = "http://dx.doi.org/10.1016/j.tws.2006.01.002",
url = "http://www.sciencedirect.com/science/article/pii/S0263823106000218",