| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 3.81 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
A execução de qualquer estrutura implica a existência de fases construtivas intermédias durante as quais se encontra sujeita a variações de geometria, de sistema estático e de cargas aplicadas. O efeito desse faseamento, comum a todas as estruturas, atinge particular relevo na análise de estruturas de grandes dimensões, podendo conduzir a distribuições de esforços diferentes das obtidas com uma análise realizada considerando apenas a geometria final. Os edifícios altos, as pontes e os viadutos constituem estruturas sensíveis aos efeitos do faseamento construtivo. No presente trabalho é apresentada uma metodologia, baseada numa análise no domínio do tempo, para o cálculo dos efeitos do faseamento construtivo em estruturas reticuladas contínuas planas. O modelo proposto considera a possibilidade dos elementos estruturais e ações serem introduzidos ou removidos em qualquer instante do domínio em análise. Este princípio permite simular de forma mais precisa os processos construtivos mais utilizados na execução destes tipos de estruturas. A metodologia apresentada foi implementada num programa de cálculo automático de estruturas, que permite a análise estrutural baseada numa formulação matricial do método dos deslocamentos.
The execution of any structure implies the existence of intermediate construction phases, during which the structure is subject to geometry, static system and applied loads variations. The effect of these phases, common to all structures, achieves particular importance in the analysis of large-scale structures, and might lead to different force distributions from the ones obtained with an analysis performed only considering the final geometry. The high-rise buildings, bridges and viaducts are structures sensible to the effects of construction phasing. In this work, is presented a methodology based on a time domain analysis for the calculation of the construction phasing effects in continuous frame structures. The proposed model considers the possibility of structural elements and actions being inserted or removed at any moment of the analysis. This principle makes it possible to simulate more accurately the most used construction methods in the execution of this type of structures. The presented methodology was implemented in an automatic calculation program of structures, which allows the structural analysis based on a displacement method matrix formulation.
The execution of any structure implies the existence of intermediate construction phases, during which the structure is subject to geometry, static system and applied loads variations. The effect of these phases, common to all structures, achieves particular importance in the analysis of large-scale structures, and might lead to different force distributions from the ones obtained with an analysis performed only considering the final geometry. The high-rise buildings, bridges and viaducts are structures sensible to the effects of construction phasing. In this work, is presented a methodology based on a time domain analysis for the calculation of the construction phasing effects in continuous frame structures. The proposed model considers the possibility of structural elements and actions being inserted or removed at any moment of the analysis. This principle makes it possible to simulate more accurately the most used construction methods in the execution of this type of structures. The presented methodology was implemented in an automatic calculation program of structures, which allows the structural analysis based on a displacement method matrix formulation.
Description
Keywords
Análise No Domínio do Tempo Estruturas Reticuladas Faseamento Construtivo Programa de Cálculo Automático