Hysteretic modelling of x-braced shear walls |
| |
Authors: | Natividad Pastor Antonio Rodríguez-Ferran |
| |
Affiliation: | Laboratori de Càlcul Numèric (LaCàN), Departament de Matemàtica Aplicada III, E.T.S. d'Enginyers de Camins, Canals i Ports de Barcelona, Universitat Politècnica de Catalunya, Edifici C2, Campus Nord UPC, Jordi Girona 1-3, E-08034 Barcelona, Spain |
| |
Abstract: | We present a differential model of the hysteretic behavior 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 spectra. The model also allows to couple several x-braced frames to obtain the response of more complex structures such as complete façades. 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. |
| |
Keywords: | Hysteresis Shear walls x-Bracing Cold-formed steel structures Seismic design q-Factor |
本文献已被 ScienceDirect 等数据库收录! |
|