A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance-based slenderness limits for deformations and crack control of reinforced concrete flexural members
The use of high strength materials allows flexural members to resist the design loads or to cover long spans with a reduced depth. However, the strict cross section dimensions and reinforcement amount required in ULS are often insufficient to satisfy the serviceability limit states. Due to the complexity associated to a rigorous computation of deflections and cracks width in cracked RC members along their service life, an effective way to ensure the satisfaction of the SLS is to limit the slenderness ratio l/d of the element. In the present study, the slenderness limit concept, previously used for deflection control, is generalized to incorporate the crack width limitations in the framework of structural performance-based design. Equations for slenderness limits incorporating the main parameters influencing the service behaviour of RC members are derived. Cracking and long-term effects are accounted for through simplified coefficients derived from structural concrete mechanics and experimental observations. The proposed slenderness limits are compared with those derived from a numerical non-linear time-dependent analysis for two case studies, and also with those obtained using the EC2 procedure for deflection calculation in terms of constant applied load and constant reinforcement strain. Very good results have been obtained in terms of low errors and scatter, showing that the proposed slenderness limits are a useful tool for performance-based design of RC structures. ; Peer Reviewed ; Postprint (author's final draft)
Performance-based slenderness limits for deformations and crack control of reinforced concrete flexural members
The use of high strength materials allows flexural members to resist the design loads or to cover long spans with a reduced depth. However, the strict cross section dimensions and reinforcement amount required in ULS are often insufficient to satisfy the serviceability limit states. Due to the complexity associated to a rigorous computation of deflections and cracks width in cracked RC members along their service life, an effective way to ensure the satisfaction of the SLS is to limit the slenderness ratio l/d of the element. In the present study, the slenderness limit concept, previously used for deflection control, is generalized to incorporate the crack width limitations in the framework of structural performance-based design. Equations for slenderness limits incorporating the main parameters influencing the service behaviour of RC members are derived. Cracking and long-term effects are accounted for through simplified coefficients derived from structural concrete mechanics and experimental observations. The proposed slenderness limits are compared with those derived from a numerical non-linear time-dependent analysis for two case studies, and also with those obtained using the EC2 procedure for deflection calculation in terms of constant applied load and constant reinforcement strain. Very good results have been obtained in terms of low errors and scatter, showing that the proposed slenderness limits are a useful tool for performance-based design of RC structures. ; Peer Reviewed ; Postprint (author's final draft)
Performance-based slenderness limits for deformations and crack control of reinforced concrete flexural members
Marí Bernat, Antonio Ricardo (author) / Torres Llinàs, Lluís (author) / Oller Ibars, Eva (author) / Barris Peña, Cristina (author) / Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental / Universitat Politècnica de Catalunya. ATEM - Anàlisi i Tecnologia d'Estructures i Materials
2019-05-01
Article (Journal)
Electronic Resource
English
Formigó armat -- Propietats mecàniques , Slenderness limits Deflection Crack width Serviceability Limit State Reinforced concrete Reinforcement ratio Performance-based design , Reinforced concrete--Mechanical properties , Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó
DDC:
690
Lower Slenderness Limits for Rectangular Reinforced Concrete Columns
| British Library Online Contents | 2005
Lower Slenderness Limits for Rectangular Reinforced Concrete Columns
| Online Contents | 2005