http://hdl.handle.net/2117/478 Sat, 25 May 2013 02:46:01 GMT 2013-05-25T02:46:01Z webmaster.bupc@upc.edu Universitat Politècnica de Catalunya. Servei de Biblioteques i Documentació no http://hdl.handle.net/2117/16288 Title: Some characteristics of a daily rainfall regime based on the Dry Day Last Rain index (DDSLR) Authors: Lana Pons, Francisco Javier; Burgueño, August; Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina Abstract: The Dry Day Since Last Rain index, DDSLR, quantifies for every recording day the number of consecutive preceding days with daily rainfall below a threshold. In essence, DDSLR may quantify the hydrologic stress generated by consecutive days of rainfall deficit taking into account some daily rainfall thresholds associated with the resolution of the pluviometer, evapotranspiration, runoff and thin layer saturation processes. A detailed analysis of DDSLR at daily and annual scales and for the whole recording period permits a complete description of the daily rainfall deficit regime and induced hydrologic stress. These characteristics have been derived for 0.1, 1.0, 5.0 and 10.0 mm/day thresholds for 93 years (1917–2009) of continuous daily rainfall records at the Fabra Observatory (Barcelona, NE Spain). Time trends on chronological series of DDSLR are determined and statistically tested for every calendar day. Fourier series analysis applied to four calendar day statistics (number of non-null DDSLR, average, standard deviation and maximum of DDSLR) leads to detection of the dominant periodicities, taking as fundamental periodicity the 365 days of the year. The best statistical model reproducing the empirical distribution of DDSLR, year by year, for every calendar day and for the whole recording period, is also investigated. Whatever the time scale considered, the Poisson-gamma model is assumed due to the non-negligible number of null DDSLR. Finally, time trends on extreme series of annual DDSLR, the appropriate statistical model for these series (the generalised logistic distribution, GLO), together with an estimation of DDSLR for several return periods, permit the description of the expected main future patterns of this index. In this way, current and next future hydrologic stress at the Fabra Observatory and neighbouring areas become characterised. Wed, 18 Jul 2012 11:07:03 GMT http://hdl.handle.net/2117/16288 2012-07-18T11:07:03Z Lana Pons, Francisco Javier; Burgueño, August; Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina no The Dry Day Since Last Rain index, DDSLR, quantifies for every recording day the number of consecutive preceding days with daily rainfall below a threshold. In essence, DDSLR may quantify the hydrologic stress generated by consecutive days of rainfall deficit taking into account some daily rainfall thresholds associated with the resolution of the pluviometer, evapotranspiration, runoff and thin layer saturation processes. A detailed analysis of DDSLR at daily and annual scales and for the whole recording period permits a complete description of the daily rainfall deficit regime and induced hydrologic stress. These characteristics have been derived for 0.1, 1.0, 5.0 and 10.0 mm/day thresholds for 93 years (1917–2009) of continuous daily rainfall records at the Fabra Observatory (Barcelona, NE Spain). Time trends on chronological series of DDSLR are determined and statistically tested for every calendar day. Fourier series analysis applied to four calendar day statistics (number of non-null DDSLR, average, standard deviation and maximum of DDSLR) leads to detection of the dominant periodicities, taking as fundamental periodicity the 365 days of the year. The best statistical model reproducing the empirical distribution of DDSLR, year by year, for every calendar day and for the whole recording period, is also investigated. Whatever the time scale considered, the Poisson-gamma model is assumed due to the non-negligible number of null DDSLR. Finally, time trends on extreme series of annual DDSLR, the appropriate statistical model for these series (the generalised logistic distribution, GLO), together with an estimation of DDSLR for several return periods, permit the description of the expected main future patterns of this index. In this way, current and next future hydrologic stress at the Fabra Observatory and neighbouring areas become characterised. http://hdl.handle.net/2117/15869 Title: Seismic performance of buildings with thin RC bearing walls Authors: Gonzáles Fernández, Helbert; López Almansa, Francisco Abstract: up to five stories) with thin RC shear-walls have been constructed for low-cost dwellings in Bolivia, Colombia, Ecuador, Mexico, Peru, Venezuela, and other countries located in seismic-prone regions. These walls are 10 cm thick and their reinforcement consists mainly of a single layer of welded wire mesh. This construction technology offers two main advantages: economy and rapidity of construction. These buildings do not fulfill the international seismic codes but some national regulations are less demanding, not preventing the use of thin bearing walls. These buildings might be vulnerable to earthquakes because of their low ductility, the insufficiency of the experimental information, the absence of observed damages and, in some cases, poor construction quality. This work describes the initial steps of a wider research aiming at providing reliable seismic design guidelines for thin-wall buildings; the initial objectives are analyzing the seismic performance of these buildings, proposing preliminary design criteria and identifying further research needs. This research focuses on buildings located in Peru, being representative of the situations in the other countries. The vulnerability is numerically evaluated by push-over and nonlinear time history analyses; the structural parameters are obtained from available testing information. The obtained results show that the seismic strength of the analyzed buildings is insufficient; however, minor changes in the structural design might improve significantly their seismic performance. Economical and easy-to-implement design recommendations are issued. Wed, 16 May 2012 10:08:51 GMT http://hdl.handle.net/2117/15869 2012-05-16T10:08:51Z Gonzáles Fernández, Helbert; López Almansa, Francisco no Seismic vulnerability, Thin supporting walls, Reinforced concrete, Push-over analysis, Nonlinear time history analysis up to five stories) with thin RC shear-walls have been constructed for low-cost dwellings in Bolivia, Colombia, Ecuador, Mexico, Peru, Venezuela, and other countries located in seismic-prone regions. These walls are 10 cm thick and their reinforcement consists mainly of a single layer of welded wire mesh. This construction technology offers two main advantages: economy and rapidity of construction. These buildings do not fulfill the international seismic codes but some national regulations are less demanding, not preventing the use of thin bearing walls. These buildings might be vulnerable to earthquakes because of their low ductility, the insufficiency of the experimental information, the absence of observed damages and, in some cases, poor construction quality. This work describes the initial steps of a wider research aiming at providing reliable seismic design guidelines for thin-wall buildings; the initial objectives are analyzing the seismic performance of these buildings, proposing preliminary design criteria and identifying further research needs. This research focuses on buildings located in Peru, being representative of the situations in the other countries. The vulnerability is numerically evaluated by push-over and nonlinear time history analyses; the structural parameters are obtained from available testing information. The obtained results show that the seismic strength of the analyzed buildings is insufficient; however, minor changes in the structural design might improve significantly their seismic performance. Economical and easy-to-implement design recommendations are issued. http://hdl.handle.net/2117/12569 Title: Seismic performance reliability analysis for reinforced concrete buildings Authors: El Ghoulbzouri, Abdelouafi; Khamlichi, Abdellatif; Bezzazi, Mohamed; López Almansa, Francisco Mon, 16 May 2011 11:49:14 GMT http://hdl.handle.net/2117/12569 2011-05-16T11:49:14Z El Ghoulbzouri, Abdelouafi; Khamlichi, Abdellatif; Bezzazi, Mohamed; López Almansa, Francisco no http://hdl.handle.net/2117/11099 Title: Tendencias actuales en la definición de la acción sísmica Authors: Barbat Barbat, Horia Alejandro; Hurtado Gómez, Jorge Eduardo; Orosco, Lia; Canas Torres, José Antonio Tue, 18 Jan 2011 18:12:41 GMT http://hdl.handle.net/2117/11099 2011-01-18T18:12:41Z Barbat Barbat, Horia Alejandro; Hurtado Gómez, Jorge Eduardo; Orosco, Lia; Canas Torres, José Antonio no Modelos estocásticos, energía inducida, modelos simológicos, índices de daño, dispersión espacial http://hdl.handle.net/2117/11087 Title: Response to the comments on “Time trends of daily maximum and minimum temperatures in Catalonia (NE Spain) for the period 1975-2004” Authors: Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina; Burgueño, August; Lana Pons, Francisco Javier Tue, 18 Jan 2011 14:54:01 GMT http://hdl.handle.net/2117/11087 2011-01-18T14:54:01Z Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina; Burgueño, August; Lana Pons, Francisco Javier no http://hdl.handle.net/2117/11009 Title: Shear-wave velocity tomography of the lithosphere-asthenosphere system beneath the Mediterranean region Authors: Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier Thu, 13 Jan 2011 11:49:36 GMT http://hdl.handle.net/2117/11009 2011-01-13T11:49:36Z Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier no http://hdl.handle.net/2117/10514 Title: Vulnerabilidad y fragilidad sísmicas de un edificio de acero localizado en Manizales, Colombia Authors: Bermúdez, Carlos Alberto; Barbat Barbat, Horia Alejandro; Pujades Beneit, Lluís Abstract: This paper is centred in the study of the seismic behaviour of all existing steel building, located in the National University of Colombia in Manizales, zone of high seismic hazard according to the Colombian seismic codeo Two building frames are analyzed: one is a moment-resisting frame and the another one is braced fimne. The study analyses the plastification process that the building follows starting from its elastic behaviour until the collapse. Its capacity spectrum is correlated with the stress and strain states to determine the demand parameters, like the spectral displacement, used to describe the thresholds of the damage states. Once defined, these thresholds they are related to the characteristic points of the bilinear capacity spectrum. By means of statistical procedures, the fragility curves are obtained what allow calculating the damage probability matrix and the damage probability vector corresponding to the design seismic action. Based on this vector a class of seismic vulnerability is assigned to the moment-resisting frame and the braced frame. Finally, the vulnerability index is calculated for each case. Thu, 09 Dec 2010 18:10:18 GMT http://hdl.handle.net/2117/10514 2010-12-09T18:10:18Z Bermúdez, Carlos Alberto; Barbat Barbat, Horia Alejandro; Pujades Beneit, Lluís no vulnerabilidad, fragilidad, pórtico resistente a momentos, pórtico arriostrado, daño sísmico This paper is centred in the study of the seismic behaviour of all existing steel building, located in the National University of Colombia in Manizales, zone of high seismic hazard according to the Colombian seismic codeo Two building frames are analyzed: one is a moment-resisting frame and the another one is braced fimne. The study analyses the plastification process that the building follows starting from its elastic behaviour until the collapse. Its capacity spectrum is correlated with the stress and strain states to determine the demand parameters, like the spectral displacement, used to describe the thresholds of the damage states. Once defined, these thresholds they are related to the characteristic points of the bilinear capacity spectrum. By means of statistical procedures, the fragility curves are obtained what allow calculating the damage probability matrix and the damage probability vector corresponding to the design seismic action. Based on this vector a class of seismic vulnerability is assigned to the moment-resisting frame and the braced frame. Finally, the vulnerability index is calculated for each case. http://hdl.handle.net/2117/10446 Title: Predictability of the monthly North Atlantic Oscillation index based on fractal analyses and dynamic system theory Authors: Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier; Burgueño, August; Serra de Larrocha, Carina Mon, 29 Nov 2010 12:25:59 GMT http://hdl.handle.net/2117/10446 2010-11-29T12:25:59Z Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier; Burgueño, August; Serra de Larrocha, Carina no http://hdl.handle.net/2117/10362 Title: Reliability Analysis for Seismic Performance Assessment of Concrete Reinforced Buildings Authors: López Almansa, Francisco Mon, 22 Nov 2010 12:48:43 GMT http://hdl.handle.net/2117/10362 2010-11-22T12:48:43Z López Almansa, Francisco no http://hdl.handle.net/2117/10361 Title: Effective Performance based Seismic Retrofit of Pre-code Reinforced Concrete Buildings Authors: López Almansa, Francisco Mon, 22 Nov 2010 12:41:27 GMT http://hdl.handle.net/2117/10361 2010-11-22T12:41:27Z López Almansa, Francisco no http://hdl.handle.net/2117/10141 Title: Experimental testing of a new anti-seismic dissipator energy device based on the plasticity of metals Authors: Franco, J.M.; Cahis, X.; Gracia, L.; López Almansa, Francisco Fri, 05 Nov 2010 12:54:35 GMT http://hdl.handle.net/2117/10141 2010-11-05T12:54:35Z Franco, J.M.; Cahis, X.; Gracia, L.; López Almansa, Francisco no http://hdl.handle.net/2117/10138 Title: Design energy input spectra for moderate-to-high seismicity regions based on Colombian earthquakes Authors: Benavent Climent, A.; López Almansa, Francisco; Bravo González, Diego Andrés Fri, 05 Nov 2010 12:24:42 GMT http://hdl.handle.net/2117/10138 2010-11-05T12:24:42Z Benavent Climent, A.; López Almansa, Francisco; Bravo González, Diego Andrés no http://hdl.handle.net/2117/10117 Title: Reinforced brick masonry light vaults: Semi-prefabrication, construction, testing and numerical modeling Authors: López Almansa, Francisco; Sarrablo Moreno, Vicente; Lourenco, P. B.; Barros, J. A. O; Roca Fabregat, Pedro; da Porto, F.; Modena, C. Thu, 04 Nov 2010 14:40:54 GMT http://hdl.handle.net/2117/10117 2010-11-04T14:40:54Z López Almansa, Francisco; Sarrablo Moreno, Vicente; Lourenco, P. B.; Barros, J. A. O; Roca Fabregat, Pedro; da Porto, F.; Modena, C. no http://hdl.handle.net/2117/10048 Title: Statistical distributions of daily rainfall regime in Europe for the period 1951-2000 Authors: Burgueño, August; Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina; Lana Pons, Francisco Javier Thu, 28 Oct 2010 11:35:16 GMT http://hdl.handle.net/2117/10048 2010-10-28T11:35:16Z Burgueño, August; Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina; Lana Pons, Francisco Javier no http://hdl.handle.net/2117/10028 Title: Long-term rainfall monthly shortage in Spain: spatial patterns, statistical models and time trends Authors: Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier; Burgueño, August Wed, 27 Oct 2010 14:42:06 GMT http://hdl.handle.net/2117/10028 2010-10-27T14:42:06Z Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier; Burgueño, August no