Infiltrations and leakages occur in buildings due to failure in waterproofing systems and building maintenance absence. Thus, leakages are to appear in slabs, beams, columns and other structural elements as recovering and masonries. Leakages and infiltrations can lead to damages in potable waters or sewage pipes and they can happen at the same time. This paper aims to show engineering investigating works in compliance with leakages and infiltrations in buildings. The paper intends to contribute to relevant rules where investigating, analysis and conclusions works can be performed.
Electrical energy became crucial for a fully functioning in a modern society and research for development of the electrical system and transmission methods became essential. The paper deals with analysis of transmission lines towers, involving details of the design of a transmission line tower from the beginning until the end of line construction. Modeling process of the structure is performed by Tower, an auxiliary software for structural analysis. Load tests to evaluate the structures behavior are showed. Recurring faults as wind action, cables rupture, and cascade effect, which cause damage to operation of the line are showed. Optimization methods for structural calculus are suggested. Structural reliability studies in order to improve the design as a whole and avoid future failures are also suggested.
The knowledge about the types of materials and profiles in structural projects has become increasingly important with the advance of technology in structural areas. The evolution of the cross-section geometry of a profile is of paramount importance to generate great efficiency in the structural area along with other benefits such as low production costs. In this research, the results of a study on the stability behavior of cold-formed steel bars with Z90 cross-section chosen through NBR 6355:2012 are presented and discussed. The applicability or not of V-shaped ribs in the web and/or in the flanges of the profiles is considered, which occur compression load at their ends and being studied for each example a simply supported member. The research aims to analyze the structural behavior of the profiles, identifying the different behaviors for each type of cross-section studied with the deformation modes that occur and to reach a conclusion as to the use of ribs being an important factor for increasing the resistance of the bar. Analysis of structural stability was performed identifying geometries affected by instability phenomena with the help of the GBTUL program, which uses the Generalized Beam Theory generating the results of bifurcation loads and modal participation diagrams that are of great importance to verify the structural behavior of the studied profiles. With the results generated, the profile with the introduction of ribs both on the web and on the flanges had higher resistance, followed by the profile with ribs only on the web, in third place the profile with ribs only on the flanges and with the lowest resistance, the profile without ribs. Thus, it can be concluded that the introduction of ribs generated a greater resistance of the profile regarding the compression load applied at its extremities.
Análise do comportamento estrutural e da resistência de perfis Z90 de aço formados a frio com a utilização de nervuras Analysis of the structural behavior and strength of cold formed steel Z90 profiles with the use of ribs
As pontes rodoviárias de concreto armado devem ser construídas levando em consideração a ação de cargas permanentes e variáveis, como também as ações dinâmicas provenientes do tráfego de veículos. O advento da globalização e consequentemente a expansão do fluxo de veículos, principalmente os de grande porte, são uns dos fatores de extrema importância a serem avaliados no processo de montagem e dimensionamento de superestruturas, pois estão inerentes ao surgimento de momentos fletores transversais na laje da ponte. A correta consideração desses aspectos para análise estrutural de uma ponte motivou o desenvolvimento desse estudo, para avaliar os esforços despertados no elemento estrutural responsável por suportar as cargas de tráfego, as lajes. Intrínseco a esse estudo, é analisada a relação da variação de espessuras das lajes em balanço (cantilever) com a intensidade dos momentos transversais despertados na região de influência do tabuleiro. O estudo aborda o modelo analítico desenvolvido por Bakht e Jaeger (1985), realizando uma inspeção dos momentos fletores despertados na laje em balanço, a partir da aplicação de cargas concentradas sobre a superfície do cantilever, bem como a variação de suas posições e das espessuras da superestrutura. A pesquisa é elaborada com o auxílio do programa computacional Microsoft Excel. As conclusões desse trabalho versam a correta análise dos esforços despertados em lajes de pontes em balanço, bem como os benefícios proporcionados pela variação de espessuras do tabuleiro e a introdução de vigas de bordo na estrutura, proporcionando uma maior eficiência de redução dos momentos transversais despertados no tabuleiro.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.