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Ram B Naik - One of the best experts on this subject based on the ideXlab platform.

  • wind analysis of Bridges by gust load factor method
    International Journal of Research, 2017
    Co-Authors: Ram B Naik
    Abstract:

    Wind is a widespread and costly natural hazard to mankind . Adequate of wind effect in design is essential for the safety and economics of structure. Wind engineering is an emerging discipline. Even though there is vast amount of literature available in this field, it is dispersed in journals and technical reports that relate to the discipline of structural engineering, fluid dynamics, mechanical engineering, atmospheric sciences, and others. Because of this dispersion architects and engineers have difficulty in leaning and understanding problems associated with wind load. The Bridges are made of different materials. Timber, masonry, concrete and steel are the primary materials which are most common in the design of Bridges. The timber Bridges are constructed only over small spans and for temporary purpose. The masonry Bridges can also be used to cover only the small spans. The ratio of permissible stress to weight for masonry is fairly small and in spans larger than about 12 m the dead load of the masonry will make its use uneconomical. Reinforced concrete is probably the most popular material for permanent highway Bridges in India. Balanced Cantilever Bridges and pre stressed concrete girder Bridges can be used for spans up to 60 m. Concrete arch has been used for spans of 200 m. In India for railway Bridges steel is used for very small spans to very large spans. Bridges are built for many purposes e.g. carrying a highway, a railway track, for support of water pipes, gas or oil pipes etc. Nearly all important Bridges are built primarily for purposes of carrying a highway or railway over a river, canal, another highway or railway or some other natural or artificial obstacle.

Aristizabal Vivas, Juan José - One of the best experts on this subject based on the ideXlab platform.

  • Desarrollo computacional para el análisis y diseño de columnas huecas para puentes
    Carrera de Ingeniería Civil, 2016
    Co-Authors: Acosta Orjuela, Sergio Andrés, Aristizabal Vivas, Juan José
    Abstract:

    El presente trabajo de grado tiene como objetivo principal el desarrollo de un software para computador, que diseña y analiza las pilas huecas rectangulares para puentes en voladizos sucesivos, basado en el Código Colombiano de Puentes del 2014 (CCP-14) Esta investigación contempla las cargas a las que están sometidos los puentes, al igual que la forma como se deben usar y recomendaciones para calcularse según el código. También se tienen en cuenta los métodos de diseño que se utilizan normalmente en el diseño a flexión de columnas, buscando que se obtenga un diseño seguro y óptimo en cuanto a la sección utilizada. El software se basa principalmente en dos métodos de diseño. El primero, el más común en columnas, el diseño a flexo-compresión, en donde se obtienen los diagramas de interacción de la columna para los ejes X y Y por separado. El segundo, un diseño biaxial basado en el método de cargas recíprocas de Bresler, en donde se chequea la columna en ambas direcciones utilizando los dos diagramas encontrados en la primera parte. Para realizar estos diseños, el programa parte de conocer las dimensiones de la pila, la cantidad de refuerzo, y las cargas a la que será sometida. Con el software finalizado, se realiza el análisis de varias columnas con secciones y refuerzos distintos utilizando un programa de análisis estructural mediante elementos finitos (SAP2000), igualmente con las mismas dimensiones y refuerzo se realiza el cálculo con el software desarrollado. Esto se realiza con el fin de validar los resultados con un programa mundialmente reconocido por su confiabilidad. Finalmente, teniendo el software desarrollado, se procede a realizar un diseño de las pilas huecas del puente Valencia en el departamento de Córdoba, Colombia. Siguiendo las directrices ABET establecidas por la institución, se desarrolla como componente de diseño del trabajo de grado. Para esto se obtienen la información del proyecto necesaria para realizar el modelo estructural, proporcionado por la empresa HINCACOM S.A.S.This research aims to the development of a computer software which designs and analyzes the rectangular hollow piles for Cantilever Bridges, based on the Bridges Colombian Code (CPC-14) This review provides the loads a bridge is subjected to, the way it should be used, and recommendations to calculate them according to the code CCP-14. It also takes into account design methods that are commonly used in the design of flexural columns, seeking a safe and optimal design for the utilized section. The software is based on two design methods. First, the most common in columns, the flexo-compression design, where interaction diagrams of the column for X and Y axis are obtained separately. The second, a biaxial design based on the Breler’s reciprocal loads method, where the column is checked in both directions using two diagrams found in the first part. To obtain these designs, the program uses the geometry of the section, the reinforcement, and loads is submitted to. An analysis is conducted for various section columns and reinforcements using a program of structural finite element analysis (SAP2000), and compared with the software develope. This is done in order to validate the results with a program recognized worldwide for its reliability. Finally, the design is done for the hollow bridge piles in Valencia in the department of Cordoba, Colombia. Following the ABET guidelines established by the institution, it is developed as a component of design. For this project information was obtained, for the structural model, by the company HINCACOM S.A.S

Jorge Kingland Paredes - One of the best experts on this subject based on the ideXlab platform.

Chan Tommy - One of the best experts on this subject based on the ideXlab platform.

  • On the influence of structural complexity on damage detection
    International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII), 2017
    Co-Authors: Cowled Craig, Thambiratnam David, Chan Tommy
    Abstract:

    Operational Bridges range in complexity from relatively simple structures, such as beam Bridges, up to incredibly complex structures, such as long-span suspension Bridges or through-truss Cantilever Bridges. While damage detection (DD) research has progressed in tightly controlled numerical and experimental studies, there have been very few examples in the literature of successful DD on operational Bridges (e.g., Brownjohn et al., 2011). Environmental and operational variability have previously been identified as creating uncertainty (e.g., Sohn, 2007), but the influence of structural complexity on uncertainty has been treated as almost axiomatic (e.g., Moon & Aktan, 2006) rather than being demonstrated. This paper argues that structural complexity does, in fact, influence the outcome of damage detection studies as a result of uncertainty. The argument begins with a definition of what is meant by complexity and a review of methods of quantifying complexity. The most promising measures are modified to reduce the effect of degeneracy and then used to evaluate the complexity of structures in damage detection studies. A statistical analysis reveals that the structural complexity of experimental structures is negatively correlated with achieved level of DD (p=0.041). A logical argument establishes the causal link between complexity and uncertainty

Acosta Orjuela, Sergio Andrés - One of the best experts on this subject based on the ideXlab platform.

  • Desarrollo computacional para el análisis y diseño de columnas huecas para puentes
    Carrera de Ingeniería Civil, 2016
    Co-Authors: Acosta Orjuela, Sergio Andrés, Aristizabal Vivas, Juan José
    Abstract:

    El presente trabajo de grado tiene como objetivo principal el desarrollo de un software para computador, que diseña y analiza las pilas huecas rectangulares para puentes en voladizos sucesivos, basado en el Código Colombiano de Puentes del 2014 (CCP-14) Esta investigación contempla las cargas a las que están sometidos los puentes, al igual que la forma como se deben usar y recomendaciones para calcularse según el código. También se tienen en cuenta los métodos de diseño que se utilizan normalmente en el diseño a flexión de columnas, buscando que se obtenga un diseño seguro y óptimo en cuanto a la sección utilizada. El software se basa principalmente en dos métodos de diseño. El primero, el más común en columnas, el diseño a flexo-compresión, en donde se obtienen los diagramas de interacción de la columna para los ejes X y Y por separado. El segundo, un diseño biaxial basado en el método de cargas recíprocas de Bresler, en donde se chequea la columna en ambas direcciones utilizando los dos diagramas encontrados en la primera parte. Para realizar estos diseños, el programa parte de conocer las dimensiones de la pila, la cantidad de refuerzo, y las cargas a la que será sometida. Con el software finalizado, se realiza el análisis de varias columnas con secciones y refuerzos distintos utilizando un programa de análisis estructural mediante elementos finitos (SAP2000), igualmente con las mismas dimensiones y refuerzo se realiza el cálculo con el software desarrollado. Esto se realiza con el fin de validar los resultados con un programa mundialmente reconocido por su confiabilidad. Finalmente, teniendo el software desarrollado, se procede a realizar un diseño de las pilas huecas del puente Valencia en el departamento de Córdoba, Colombia. Siguiendo las directrices ABET establecidas por la institución, se desarrolla como componente de diseño del trabajo de grado. Para esto se obtienen la información del proyecto necesaria para realizar el modelo estructural, proporcionado por la empresa HINCACOM S.A.S.This research aims to the development of a computer software which designs and analyzes the rectangular hollow piles for Cantilever Bridges, based on the Bridges Colombian Code (CPC-14) This review provides the loads a bridge is subjected to, the way it should be used, and recommendations to calculate them according to the code CCP-14. It also takes into account design methods that are commonly used in the design of flexural columns, seeking a safe and optimal design for the utilized section. The software is based on two design methods. First, the most common in columns, the flexo-compression design, where interaction diagrams of the column for X and Y axis are obtained separately. The second, a biaxial design based on the Breler’s reciprocal loads method, where the column is checked in both directions using two diagrams found in the first part. To obtain these designs, the program uses the geometry of the section, the reinforcement, and loads is submitted to. An analysis is conducted for various section columns and reinforcements using a program of structural finite element analysis (SAP2000), and compared with the software develope. This is done in order to validate the results with a program recognized worldwide for its reliability. Finally, the design is done for the hollow bridge piles in Valencia in the department of Cordoba, Colombia. Following the ABET guidelines established by the institution, it is developed as a component of design. For this project information was obtained, for the structural model, by the company HINCACOM S.A.S