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A RELIABILITY CRITERION TO EVALUATE THE PERFORMANCE OF STRUT-AND-TIE MODELS APPLIED IN DESIGN AND ANALYSIS OF REINFORCED CONCRETE STRUCTURES

معيار الموثوقية لتقييم أداء نماذج الدعامات والأعمدة المطبقة في تصميم وتحليل الهياكل الخرسانية المسلحة
Authors: João da Costa Pantoja; Luiz Eloy Vaz; Luiz Fernando Martha;

A RELIABILITY CRITERION TO EVALUATE THE PERFORMANCE OF STRUT-AND-TIE MODELS APPLIED IN DESIGN AND ANALYSIS OF REINFORCED CONCRETE STRUCTURES

Abstract

En este trabajo se muestra un criterio de fiabilidad para el análisis de estructuras de hormigón armado aplicando el modelo strut-and-tie. El método de simulación de Monte Carlo se utiliza para calcular el índice de confiabilidad y la probabilidad de modos de falla, considerando tanto el comportamiento de seguridad como el dúctil del modelo de puntal y amarre. Se consideran tres formulaciones diferentes presentadas en la literatura para calcular la resistencia efectiva a la compresión del concreto: ACI-318, EUROCODE y Schailch et al. Tanto el valor del índice de fiabilidad como el comportamiento de ductilidad se consideran en esta comparación. Se presentan dos ejemplos para el diseño de un haz profundo utilizando el análisis de confiabilidad para la validación de los aspectos de seguridad y ductilidad.

Cet article montre un critère de fiabilité pour l'analyse des structures en béton armé en appliquant le modèle entretoise et cravate. La méthode de simulation Monte Carlo est utilisée pour calculer l'indice de fiabilité et la probabilité des modes de défaillance, en tenant compte à la fois de la sécurité et du comportement ductile du modèle de jambe de force. Trois formulations différentes présentées dans la littérature pour calculer la résistance effective à la compression du béton sont considérées : ACI-318, EUROCODE et Schailch et al. La valeur de l'indice de fiabilité et le comportement de ductilité sont pris en compte dans cette comparaison. Deux exemples de conception d'une poutre profonde utilisant l'analyse de fiabilité pour la validation des aspects de sécurité et de ductilité sont présentés.

This paper shows a reliability criterion for analysis of reinforced concrete structures applying the strut-and-tie model. Monte Carlo simulation method is used to calculate the reliability index and probability of failure modes, considering both safety and ductile behavior of the strut-and-tie model. Three different formulations presented in the literature to compute the effective compression resistance of the concrete are considered: ACI-318, EUROCODE and Schailch et al. Both reliability index value and ductility behavior are considered in this comparison. Two examples for design of a deep beam using reliability analysis for validation of safety and ductility aspects are presented.

توضح هذه الورقة معيار الموثوقية لتحليل الهياكل الخرسانية المسلحة التي تطبق نموذج الدعامة وربطة العنق. تُستخدم طريقة محاكاة مونت كارلو لحساب مؤشر الموثوقية واحتمالية أوضاع الفشل، مع الأخذ في الاعتبار كل من السلامة وسلوك الدكتايل لنموذج الدعامة والربطة. يتم النظر في ثلاث صيغ مختلفة مقدمة في الأدبيات لحساب مقاومة الانضغاط الفعالة للخرسانة: ACI -318 و EUROCODE و Schailch et al. يتم النظر في كل من قيمة مؤشر الموثوقية وسلوك الليونة في هذه المقارنة. يتم تقديم مثالين لتصميم شعاع عميق باستخدام تحليل الموثوقية للتحقق من جوانب السلامة والمرونة.

Keywords

Strut-and-Tie model,, Social Sciences, Structural engineering, Quantum mechanics, Fiber-Reinforced Polymer Composites in Construction, Reliability engineering, Decision Sciences, Engineering, Reliability,, Durability Performance, Civil and Structural Engineering, Structural Reliability, Physics, Building and Construction, Reinforcement Corrosion in Concrete Structures, Concrete Strengthening, Power (physics), Computer science, Reinforced concrete, Reliability (semiconductor), Topology optimization,, Physical Sciences, Uncertainty Quantification and Sensitivity Analysis, Concrete structures, Reliability Analysis, Statistics, Probability and Uncertainty, Reinforced Concrete

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