Hysteretic modelling of x-braced shear walls

Author (s): Pastor, N. and Rodríguez-Ferran, A.
Journal: Thin-Walled Structures

Volume: 43, Issue 10
Pages: 1567 – 1588
Date: 2005

We present a differential model of the hysteretic behaviour of unsheathed x-braced frames. The model includes all the relevant aspects (perfect or hardening plasticity of diagonal straps under tension, buckling of diagonal straps under compression). The frame is treated as a single-degree-of-freedom system, and the hysteretic model is written as a small system of ordinary differential equations. In spite of this simplified modelling approach, the proposed model captures the key features of hysteretic cycles of x-braced frames (extreme pinching and slackness) and can be used to obtain the $q$-factor for simplified seismic design based on the reduction of elastic pectra. The model also allows to couple several x-braced frames to obtain the response of more complex structures such as complete fac cades.

In fact, the agreement with a more sophisticated approach, such as a finite element model of the frame, is excellent, but the computational cost is considerably lower. This point is illustrated by various numerical examples.



author = "Pastor, N. and Rodríguez-Ferran, A.",
title = "Hysteretic modelling of x-braced shear walls ",
journal = "Thin-Walled Structures ",
volume = "43",
number = "10",
pages = "1567 - 1588",
year = "2005",
issn = "0263-8231",
doi = "http://dx.doi.org/10.1016/j.tws.2005.06.010",
url = "http://www.sciencedirect.com/science/article/pii/S0263823105000790",