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1
artículo
It is getting more frequent the deteriorated work rehab, the corrections of design flaws or poor constructive process. Because of this, it is required not only to rehabilitate but to rearrange the structures taking into consideration that that intervention have to fulfill the mechanic improvements. This research intents to make known the benefits that the reinforced polymer composite systems with carbon fiber give to improve the mechanical performance of structural concrete elements. The results of the resistance to the compression trials at 28 days of the unreinforced specimens was of 12 MPa, and with the incorporation of the reinforced polymer with carbon fiber (RPCF) at 100% it improves 2.67 times its resistance (32.04 MPa), while the reinforced specimens at 50%, improves 1.57 times its resistance (18.84 MPa). It can be concluded that the application of the RPCF, considerably increase...
2
artículo
Publicado 2012
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The objective of this work is to provide a reliable numerical model using the finite element method (FEM) for the dynamic analysis of reinforced concrete (RC) structures. For this purpose, a computer program based on a strain-rate sensitive elasto-plastic theory is developed using 3D brick finite elements. The implicit Newmark scheme with predictor and corrector phases is used for time integration of the nonlinear system of equations. In addition, the steel reinforcement is considered to be smeared and perfectly adhered to concrete and represented by membrane finite elements. Two benchmark examples are analyzed with the present numerical model and results are compared with those obtained by other authors. The present numerical model is able to reproduce the path failure, collapse loads and failure mechanism within an acceptable level of accuracy.
3
artículo
It is getting more frequent the deteriorated work rehab, the corrections of design flaws or poor constructive process. Because of this, it is required not only to rehabilitate but to rearrange the structures taking into consideration that that intervention have to fulfill the mechanic improvements. This research intents to make known the benefits that the reinforced polymer composite systems with carbon fiber give to improve the mechanical performance of structural concrete elements. The results of the resistance to the compression trials at 28 days of the unreinforced specimens was of 12 MPa, and with the incorporation of the reinforced polymer with carbon fiber (RPCF) at 100% it improves 2.67 times its resistance (32.04 MPa), while the reinforced specimens at 50%, improves 1.57 times its resistance (18.84 MPa). It can be concluded that the application of the RPCF, considerably increase...
4
tesis doctoral
Throughout this thesis, advanced numerical tools and laboratory tests are investigated that will allow an accurate prediction of the global nonlinear structural response of hybrid timber-steel connections under cyclic loading. The conceptual development of the model, its mathematical formulation, numerical coding and implementation in a commercial FE software are documented in this thesis. Furthermore, the proposed timber material model has been developed within the framework of the Continuum Damage Mechanics (CDM) theory, making it ideal for damage evolution modelling and behaviour-based seismic assessment of timber structures. Experimental studies available in the literature were employed to assess the accuracy and overall performance of the proposed constitutive model at the material and structural (or component) level. Additional local responses not easily identifiable from the exper...
5
tesis de maestría
Publicado 2013
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This research work studies the fundamentals of the Hybrid Frequency-Time Domain (HFTD) method for dynamic analysis of structures, applied to the seismic analysis of dam-reservoir interaction systems. The theoretical consistency and accuracy of the HFTD method, based on the frequency domain Fourier analysis, is demonstrated through all the parts of the thesis, but particularly in Chapter 5 for linear and highly non-linear single degree of freedom (SDOF) models subject to several types of loading, and in Chapter 7 for a 2D dam-reservoir interaction finite element model subject to an earthquake ground acceleration loading. On the other hand, a Finite Element Method (FEM) formulation of dam-reservoir interaction problems is presented, being demonstrated the frequency-dependence nature of this type of systems. The fluid compressibility and boundary conditions of the reservoir are analytically...
6
artículo
Publicado 2012
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The objective of this work is to provide a reliable numerical model using the finite element method (FEM) for the dynamic analysis of reinforced concrete (RC) structures. For this purpose, a computer program based on a strain-rate sensitive elasto-plastic theory is developed using 3D brick finite elements. The implicit Newmark scheme with predictor and corrector phases is used for time integration of the nonlinear system of equations. In addition, the steel reinforcement is considered to be smeared and perfectly adhered to concrete and represented by membrane finite elements. Two benchmark examples are analyzed with the present numerical model and results are compared with those obtained by other authors. The present numerical model is able to reproduce the path failure, collapse loads and failure mechanism within an acceptable level of accuracy.
7
artículo
Analyzing the social practice of the different progressive Latin American governements which were a response to the different social practices of neoliberalism, we can affirm that, taking into account the temporal and structural imbalances, the they were supported by a new type of extractivist there was an increasepolicy involving the installation of enclaves. At the same time ws increase price of primary products that were sold to the central States. Both elements, which implied the strong inflow of foreign currency, allowed the construction of a new type of State that I define as a Neo-commitment State which maintained a type of, unequal and combined dependency relationship with the central countries. Through it, the progressive governments could build a new multiclass domination pact between organized workers in the trade unión centrals and capital through which the different request...
8
artículo
Analyzing the social practice of the different progressive Latin American governements which were a response to the different social practices of neoliberalism, we can affirm that, taking into account the temporal and structural imbalances, the they were supported by a new type of extractivist there was an increasepolicy involving the installation of enclaves. At the same time ws increase price of primary products that were sold to the central States. Both elements, which implied the strong inflow of foreign currency, allowed the construction of a new type of State that I define as a Neo-commitment State which maintained a type of, unequal and combined dependency relationship with the central countries. Through it, the progressive governments could build a new multiclass domination pact between organized workers in the trade unión centrals and capital through which the different request...
9
Publicado 2021
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El objetivo de este trabajo es dar a conocer la presente investigación científica titulada: “Elementos de la psicolingüística”, nos brinda un decálogo sustancioso sobre la importancia de la adquisición, producción y comprensión del lenguaje y la gramática en la lengua castellana que sirve de base para los estudiantes del nivel inicial, primaria y secundaria. La mira del estudio de la lingüística es el idioma, haciendo referencia al estudio psíquico y social de la persona. Por ello, es una ciencia enfocada al estudio de todos los idiomas del mundo. Se difieren por dos planos muy significativos dentro del idioma: lengua y habla. El primero de los nombrados, se refiere a las aptitudes que tienen el individuo para comunicarse con su audiencia o interlocutores; el segundo, están conformados por signos lingüísticos proporcionados de un pueblo lingüístico. Así pues, el len...
10
artículo
The social, economic, and environmental consequences of the failure of an arch dam make it essential to evaluate its dynamic response to mitigate the risk of a disaster. Since the slenderness and flexibility of these dams tend to increase the fluid-structure interaction during an earthquake, this work compares the dynamic response of a hypothetical arch dam in the Marañón river, in northern Perú, for both full and empty-reservoir conditions. Three formulations were used to estimate the hydrodynamic pressures: Westergaard’s added mass, Eulerian and Lagrangian. The comparisons were performed for earthquakes of distinct seismogenic sources, previously matched to a uniform hazard spectrum with a return period of 10000 years. The finite element method was used to derive the seismic demands of the dam-reservoir-foundation system in COMSOL Multiphysics software, carrying out time-history a...
11
artículo
Publicado 2011
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With our article FLEXIBLE COST STRUCTURES TO OVERCOME THE GLOBALIZATION AND COMPETITIVENESS IN THE COMPANIES, presented in the journal QUIPUKAMAYOC Nº 33 we began an investigation to propose a model that incorporates the increasingly used strategy to achieve cost competitiveness in the market. Companies, with the new model of competitiveness that demands flexible production processes, are implementing business strategies in order to SPEED UP, SIMPLYFY and SECURE processes. Service companies are part of this strategy, which they are transferred functions or activities carried out within companies. But as we discussed in this article, SERVICE or OUTSOURCING costs can no longer be treated inside the other indirect costs of production (ICP) so we are looking for the fourth element, as a proposal to manage costs more accurately. This time, we will analyze various service contracts to underst...
12
artículo
Publicado 2011
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With our article FLEXIBLE COST STRUCTURES TO OVERCOME THE GLOBALIZATION AND COMPETITIVENESS IN THE COMPANIES, presented in the journal QUIPUKAMAYOC Nº 33 we began an investigation to propose a model that incorporates the increasingly used strategy to achieve cost competitiveness in the market. Companies, with the new model of competitiveness that demands flexible production processes, are implementing business strategies in order to SPEED UP, SIMPLYFY and SECURE processes. Service companies are part of this strategy, which they are transferred functions or activities carried out within companies. But as we discussed in this article, SERVICE or OUTSOURCING costs can no longer be treated inside the other indirect costs of production (ICP) so we are looking for the fourth element, as a proposal to manage costs more accurately. This time, we will analyze various service contracts to underst...
13
Publicado 2022
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El objetivo de este trabajo de investigación es dar a conocer la educación en el Perú, como en otros puntos del mundo, presenta objetivos que demandan una educación de calidad y una actualización en los enfoques, métodos y herramientas que nos brinda las teorías didácticas y los enfoques filosóficos que se tiene sobre la sociedad, además de un cambio de la actitud de los actores en el proceso de enseñanza-aprendizaje dado la gran cantidad de cambios vertiginosos que experimenta las diferentes sociedades en la actualidad por los diferentes enfoques que el Ministerio de Educación realiza. La Universidad Nacional de Educación necesita llevar a cabo un estudio que muestre la relevancia del enfoque dialéctico en el análisis de la sociedad y en el fomento de aptitudes de investigación. Esto se debe a que esta institución se dedica a la formación de docentes, cuya tarea princi...
14
artículo
Publicado 2019
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This paper initially describes aspects of the modeling of structures equipped with energy dissipators Shear Link Bozzo (SLB) and develops two iterative design procedures to select these devices. This methodology is applied to a precast 5-story reinforced concrete building. The SLB energy dissipation devices are initially stiff, but ductile with a range of yielding forces from 36 kN to 900 kN characterized by 52 + 52 standard devices. Moreover, these devices can be combined in parallel giving a very wide range of possibilities for selection and corresponding structural response. Therefore, to simplify its automatic selection, this article presents two procedures: (1) direct iteration and (2) inverse or fixed force iteration. Both procedures were implemented in an automatic application or “plugin” for the ETABS program that automates its selection for a specific structural system or ar...
15
Publicado 2021
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El presente trabajo de investigación desarrolla el diseño y construcción de elementos de máquina es un tema importante que requiere tener las dimensiones exactas y la precisión del comportamiento de las máquinas, los cuales reducen los costos, esfuerzos de trabajo y tiempos en la construcción de los diferentes elementos de máquina. Los primeros capítulos muestran la importancia de la resistencia y la rigidez de los materiales, con la finalidad de que los estudiantes tengan las bases adecuadas para el estudio de los fundamentos y normas técnicas del dibujo técnico y del diseño mecánico; así mismo, conocer los conceptos básicos sobre las distintas fallas de los elementos mecánicos que fatigan la microestructura de los materiales metálicos y no metálicos, los cuales re quieren óptima selección y además un adecuado proceso de fabricación, para garantizar la funcionalida...
16
tesis de grado
Publicado 2023
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Está presente tesis se enfoca en realizar la comparativa de diferentes alternativas de naves industriales, cuya finalidad consiste en optimizar sus desplazamientos estando sometida a diferentes solicitudes de cargas siendo la más relevante las cargas de sismos en ambas direcciones, ya que esta nos permite efectuar la verificación de las derivas bajo los estándares de la normativa E.030, estas infraestructuras serán modeladas matemáticamente en el software SAP 2000 ya que por la complejidad de sus elementos se requiere un análisis de elementos finitos. Posteriormente, una vez que se tenga las mejores alternativas para realizar la comparación de esta investigación se realizara el diseño respectivo de los elementos estructurales de concreto armado y acero estructural teniendo como referencias las normas peruanas (E.090, E.060 y E.050) y americanas (AISC 360) para obtener un diseñ...
17
artículo
Publicado 2025
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This academic paper analyzes and underscores the importance of regulating the temporal element in contracts entered into for the execution of public-private partnership (PPP) projects. It further seeks to explain how this element is often shaped by extra-legal factors, emphasizing that the timeframes established for the duration of such collaborative contracts –and for their specific execution deadlines– must be grounded in reasonable and objective justifications. This is essential to prevent arbitrary practices in their definition and, above all, to avoid unintended consequences for the management of public infrastructure and its private financing.To this end, the author examines how this matter is regulated under Peruvian law, explores the underlying premises supporting the need to regulate time-related provisions in such public contracts, and finally describes the economic and fin...
18
artículo
Publicado 2020
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Since market behavior is volatile, this research intends to help investors and business organizations make forecasts with certainty and, as a consequence, with the least possible error in order to succeed in the management of their projects and operations. Elements such as inflation rate, exchange rate, stock prices, economic and financial results, sales, among other variables, are causes of concern for investors. Due to their data structure, these financial instruments correspond to time series, which take values or realizations along time and are spaced over time. The previous behavior of the series is used to forecast its value, return and volatility. It must be taken into consideration that forecasting using traditional techniques might result in imprecisions, so it is necessary to forecast using econometric models because of their robustness and precision. These are also known as un...
19
artículo
Publicado 2020
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Since market behavior is volatile, this research intends to help investors and business organizations make forecasts with certainty and, as a consequence, with the least possible error in order to succeed in the management of their projects and operations. Elements such as inflation rate, exchange rate, stock prices, economic and financial results, sales, among other variables, are causes of concern for investors. Due to their data structure, these financial instruments correspond to time series, which take values or realizations along time and are spaced over time. The previous behavior of the series is used to forecast its value, return and volatility. It must be taken into consideration that forecasting using traditional techniques might result in imprecisions, so it is necessary to forecast using econometric models because of their robustness and precision. These are also known as un...
20
informe técnico
Publicado 2017
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La problemática vial y del transporte urbano que existe en el país que es el principal interés de este trabajo de suficiencia profesional. En los últimos años, según reportes, el Perú ha tenido una época de crecimiento económico. Esta época incentivó a que las familias tengan mayor capacidad de compra; las cuales decidieron gastar su excedente en vehículos, actualmente se cuenta con más de 2 millones de vehículos en una ciudad que no tiene la infraestructura preparada. Frente a la problemática vial y del transporte urbano, se presenta varias propuestas como solución, primeramente, como propuesta principal, es promover una cultura vial, por consiguiente, realizar el planeamiento urbano con proyección a 100 años, con este fin, se viene ejecutando obras para el transporte masivo como las líneas del metro de Lima donde el plazo de ejecución tiene un gran impacto en la soc...
