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dc.contributor.advisorLópez-Rodríguez, Ricardo R.
dc.contributor.authorMieses-Hernández, Lourdes A.
dc.date.accessioned2019-02-11T18:58:42Z
dc.date.available2019-02-11T18:58:42Z
dc.date.issued2007
dc.identifier.urihttps://hdl.handle.net/20.500.11801/1770
dc.description.abstractPuerto Rico is situated in an earthquake prone region. Most of residential buildings in Puerto Rico are reinforced concrete structures. Because of the imminent risk of being affected by a strong earthquake, it is important to study their damage vulnerability. The lack of local earthquake vulnerability curves for Puerto Rico and the fact that local construction practice differs from that in USA motivates the author to look at the development of reliable fragility curves based on typical buildings properties and selection of ground motions based on local geology characteristics and past worldwide earthquakes scaled to different peak ground acceleration to obtain a wide range of maximum accelerations. This study is directed to low rise and medium rise concrete residential buildings in Puerto Rico. Typical lateral resisting systems, comprising moment frames and structural walls are considered. The analytical models are two-dimensional and are analyzed using the nonlinear dynamic time history method considering flexural nonlinear behavior for frames and both flexural and shear nonlinear behavior for shear walls. Algan’s formulation (1982) and HAZUS drift limits were used to calculate the expected damage of the models. Damage to structures is quantified based on the inter-story drift ratio of the structure. The damage states considered were: Minor, Moderate, Substantial and Major, for Algan and Slight, Moderate, Extensive and Complete for HAZUS. With this information, lognormal functions expressed in the form of two parameters (log-median and log-standard deviation) were fitted and fragility curves developed as a function of PGA. It is common for concrete housing to have resisting elements oriented in only one direction. These structures are evaluated for forces in both directions independently and also taking in account both directions simultaneously. Multistory residential buildings in Puerto Rico commonly have shear walls oriented in both directions. A set of four fragility curves, one for each damage state is developed for each scenario studied. A total of 13 sets of fragility curves for each method are proposed. Multistory models proved to be the least vulnerable of the structures analyzed. These curves are useful tools for the insurance companies in Puerto Rico in order to improve their risk assessments.en_US
dc.description.abstractPuerto Rico está situado en una zona propensa a movimientos sísmicos importantes. Debido a esta amenaza latente, es de vital importancia conocer la vulnerabilidad sísmica de estructuras construidas en la Isla. Esta investigación esta dirigida específicamente a estructuras residenciales. La mayor parte de edificaciones para uso residencial son construidas principalmente con concreto armado y bloques de hormigón y el sistema para resistir las cargas laterales está conformado por pórticos y muros de corte. Ante la falta de curvas de vulnerabilidad locales, y debido a que las prácticas constructivas varían con respecto a Estados Unidos, se desarrollaron curvas de fragilidades basadas en construcciones típicas y en la selección de terremotos sintéticos que toman en cuenta las características geológicas de la Isla. Además se utilizaron diversos registros de terremotos pasados en distintos lugares, normalizados a distintas aceleraciones máximas, de manera tal que se cuenta con un amplio espectro de situaciones sísmicas. Luego se realizaron análisis no lineal dinámico en dos dimensiones, se consideró el comportamiento no lineal a flexión de los pórticos y el comportamiento no lineal a flexión y a cortante de las paredes y se cuantificó el estado de daño siguiendo la metodología propuesta por Algan (1982) y por HAZUS basado en la deriva de entrepiso como cuantificador del daño. Los límites de daño considerados son: “Menores”, “Moderados”, “Sustanciales” y “Mayores”. A partir de los datos obtenidos se calcularon las probabilidades de exceder los diferentes estados de daño y se ajustaron curvas lognormales definidas por dos parámetros (media y desviación estándar lognormal) en función de la aceleración máxima del terreno. Los sistemas estructurales considerados comprenden pórticos de uno y dos niveles, paredes de uno y dos niveles y multipisos estudiados tanto en la dirección fuerte como en la débil y considerando ambas direcciones. El resultado final consiste en trece grupos de curvas de fragilidad, uno para cada sistema estructural. Cada grupo consta de cuatro curvas, una para cada estado de daño que representa la probabilidad de alcanzar o exceder dicho estado de daño dado una aceleración del suelo. Estas curvas obtenidas constituyen una herramienta útil al momento de realizar análisis de riesgos por parte de las compañías aseguradoras locales.en_US
dc.description.sponsorshipInsurance Commissioner of Puerto Ricoen_US
dc.language.isoenen_US
dc.subjectFragility curvesen_US
dc.subject.lcshFlexureen_US
dc.subject.lcshEarthquake damageen_US
dc.subject.lcshShear wallsen_US
dc.titleSeismic performance and fragility curves for reinforced concrete frame and shear wall residential buildings in Puerto Ricoen_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2007 Lourdes Amelia Mieses Hernándezen_US
dc.contributor.committeeSuárez, Luis E.
dc.contributor.committeeMartínez Cruzado, José A.
dc.contributor.committeeSaffar, Ali
dc.contributor.representativeArroyo, José R.
thesis.degree.levelPh.D.en_US
thesis.degree.disciplineCivil Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.description.graduationYear2007en_US


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