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Main Author:	LEOCADIO RICO PRADILLA
Format:	Artículo científico
Language:	es
Published:	Universidad Distrital Francisco José de Caldas 2012
Subjects:	Ingeniería demanda sísmica aislamiento sísmico Aisladores de fricción aisladores elastoméricos análisis dinámico no lineal
Online Access:	https://www.redalyc.org/articulo.oa?id=257024712010
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Uso de aisladores de base en puentes de concreto simplemente apoyados LEOCADIO RICO PRADILLA GUSTAVO CHIO CHO Ingeniería demanda sísmica aislamiento sísmico Aisladores de fricción aisladores elastoméricos análisis dinámico no lineal En el presente artículo se presenta una comparación del comportamiento sísmico de puentes de concreto reforzado simplemente apoyados, usando aisladores de base de tres tipos, los aisladores de elastoméricos de alto amortiguamiento HDRB por sus siglas en inglés (High Damping Rubber Bearings), los aisladores elastómericos con núcleo de plomo LBR (Lead Rubber Bearings) y el sistema de péndulo de fricción FPS (Friction Pendulum System). Se tomó como caso de estudio el viaducto la flora, definiéndose la geometría y su correspondiente modelamiento en SAP2000. Se definierón las propiedades mecánicas de los tres aisladores usando un modelo bilineal; para el modelo del viaducto se realizó un análisis dinámico no lineal de historias en el tiempo, considerando la no linealidad en los aisladores, usando los sismos de la falla Frontal y la falla Bucaramanga- Santa Marta, escalados a nivel de superficie. Se compararon los resultados del modelo sin aislamiento sísmico versus los tres modelos con sistema de aislamiento sísmico, y se encontró que los diferentes sistemas de aislamiento sísmico reducen significativamente la demanda de los desplazamientos y fuerzas cortantes en las pilas del puente que le inducen los probables terremotos que puedan ocurrir. 2012 artículo científico 0123-921X https://www.redalyc.org/articulo.oa?id=257024712010 es http://www.redalyc.org/revista.oa?id=2570 Tecnura application/pdf Universidad Distrital Francisco José de Caldas Tecnura (Colombia) Num.34 Vol.16

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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