GNGTS 2013 - Atti del 32° Convegno Nazionale

Bardet J. P., Ichii K. and Lin C. H; 2000: EERA: A computer program for Equivalent-linear Earthquake site Response Analyses of layered soil deposits . Department of Civil Engineering, University of Southern California, Los Angeles, California. Bazzurro P. and Cornell C. A.; 2004a: Ground-motion amplification in nonlinear soil sites with uncertain properties . Bulletin of the Seismological Society of America, 94 , pp. 2090-2109. Bazzurro P. and Cornell C. A.; 2004b: Nonlinear soil-site effects in probabilistic seismic-hazard analysis . Bulletin of the Seismological Society of America, 94 , pp. 2110-2123. Bindi D., Pacor F., Luzi L., Puglia R., Massa M., Ameri G. and Paolucci R.; 2011: Ground motion prediction equations derived from the Italian strong motion database . Bull. Earthq. Eng., 9 , pp. 1899-1920. Comitè Europèen de Normalisation; 2004: Eurocode 8: Design of structures for earthquake resistance, Part 1: General rules, seismic actions and rules for buildings . Brussels, Belgium. Idriss I. M. and Sun J. I.; 1992: User’s manual for Shake91: A computer program for conducting equivalent linear seismic response analyses of horizontally layered soil deposit . Center for geotechnical modeling, Dept. of Civil and Environmental Engineering, University of California, Davis. Martelli L. and Molinari F. C.; 2008: Studio geologico finalizzato alla ricerca di potenziali serbatoi geotermici nel sottosuolo del Comune di Mirandola . Regione Emilia Romagna, Servizio Geologico Sismico e dei Suoli, Bologna, 10 Aprile 2008. Ministero delle Infrastrutture e dei Trasporti; 2008: Norme tecniche per le costruzioni . D.M. 14 Gennaio 2008, Supplemento ordinario alla Gazzetta Ufficiale No. 29, 4 Febbraio 2008. MPS Working Group; 2004: Redazione della mappa di pericolosità sismica prevista dall’Ordinanza PCM 3274 del 20 marzo 2003, Rapporto conclusivo per il dipartimento di Protezione Civile . INGV, Milano – Roma, aprile 2004, 65 pp. + 5 appendici, http://zonesismiche.mi.ingv.it/elaborazioni/. Rodriguez-Marek A., Montalva G. A., Cotton F. and Bonilla F.; 2011: Analysis of single-station standard deviation using the KiK-net data . Bulletin of the Seismological Society of America, 101 , pp. 1242-128. Experimental and numerical seismic characterization of ‘Blockhaus’ shear walls under in-plane lateral loads C. Bedon 1 , M. Fragiacomo 2 , C. Amadio 3 , C. Sadoch 4 1 Department of Architecture, Design and Urban Planning, University of Sassari, Alghero, Italy 2 Department of Architecture, Design and Urban Planning, University of Sassari, Alghero, Italy 3 Department of Engineering and Architecture, University of Trieste, Trieste, Italy 4 Rubner Haus AG SpA, Chienes, Italy Introduction. ‘Blockhaus’ systems represent a traditional construction technology which derives its structural resistance from contacts between multiple timber surfaces. The typical Blockhaus system consists in fact of a series of logs interacting together by means of ancient connections based on the effectiveness of carvings, notches and contacts. Metal fasteners are minimized, and commonly introduced exclusively at the level of foundations and roofs. Native of forested areas (North America, Scandinavia, Russia), Blockhaus technology is frequently used in modern practice for the construction of wooden houses (Fig. 1a), principally in the Italian Alpine region, Switzerland and Austria. However, the same construction technology is often used also in other earthquake-prone regions. In this context, their seismic characterization represents a not well-known topic, not easily predictable, of great interests for scientists and designers. Various recent contributions of literature are focused on specific aspects connected to the seismic response of Blockhaus systems (Hirai et al. , 2004; Branco and Araújo, 2010, 2012; Tannert et al. , 2010; Pang et al. , 2010). Nevertheless, further investigations are required to assess the typical seismic behavior of Blockhaus shear walls and to improve their resistance to seismic events. At the same time, it should be noticed that the Eurocode 8 (UNI EN 1998- 1:2004), the European Code for Seismic Design, currently does not provide design rules for Blockhaus buildings. In this context, the paper focuses on an ongoing research activity carried out in cooperation with Rubner Haus (www.haus.rubner.com ) and focused on the seicmic assessment of Blockhaus 22 GNGTS 2013 S essione 2.1