Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Compressive Stress-Strain Model for Confined Lightweight Concrete Based on Brittleness Number
https://orcid.org/http://orcid.org/0000-0001-5415-6455
https://orcid.org/http://orcid.org/0000-0001-5605-2828
https://orcid.org/http://orcid.org/0000-0003-3994-3404
Typically, the stress-strain relationship of confined lightweight aggregate concrete (LWAC) exhibits lower stiffness in the ascending branch and more brittleness in the descending branch compared to counterpart confined normal-weight concrete (NWC). To describe the rational stress-strain relationship of confined LWAC according to these trends, the concept of concrete brittleness number (ξb) was introduced. Specifically, ξb values were determined as constants in the existing size effect equation. The constants were fitted via regression analysis of 164 datasets compiled in extant studies. The models of elastic modulus, strength gain factor, strain at maximum stress, and strain at 85% of the maximum stress in descending branch were proposed, including ξb to describe the lower stiffness and more brittle behavior in confined LWAC when compared to those of counterpart confined NWC. Other existing models showed significant differences when compared with the test results in the descending behavior. These differences were significant in LWAC and counterpart NWC. Conversely, the proposed stress-strain relationship of confined concrete was in excellent agreement with the test results, irrespective of concrete type, compressive strength of concrete, and volumetric transverse reinforcement index.
Compressive Stress-Strain Model for Confined Lightweight Concrete Based on Brittleness Number
https://orcid.org/http://orcid.org/0000-0001-5415-6455
https://orcid.org/http://orcid.org/0000-0001-5605-2828
https://orcid.org/http://orcid.org/0000-0003-3994-3404
Typically, the stress-strain relationship of confined lightweight aggregate concrete (LWAC) exhibits lower stiffness in the ascending branch and more brittleness in the descending branch compared to counterpart confined normal-weight concrete (NWC). To describe the rational stress-strain relationship of confined LWAC according to these trends, the concept of concrete brittleness number (ξb) was introduced. Specifically, ξb values were determined as constants in the existing size effect equation. The constants were fitted via regression analysis of 164 datasets compiled in extant studies. The models of elastic modulus, strength gain factor, strain at maximum stress, and strain at 85% of the maximum stress in descending branch were proposed, including ξb to describe the lower stiffness and more brittle behavior in confined LWAC when compared to those of counterpart confined NWC. Other existing models showed significant differences when compared with the test results in the descending behavior. These differences were significant in LWAC and counterpart NWC. Conversely, the proposed stress-strain relationship of confined concrete was in excellent agreement with the test results, irrespective of concrete type, compressive strength of concrete, and volumetric transverse reinforcement index.
Compressive Stress-Strain Model for Confined Lightweight Concrete Based on Brittleness Number
https://orcid.org/http://orcid.org/0000-0001-5415-6455
https://orcid.org/http://orcid.org/0000-0001-5605-2828
https://orcid.org/http://orcid.org/0000-0003-3994-3404
Typically, the stress-strain relationship of confined lightweight aggregate concrete (LWAC) exhibits lower stiffness in the ascending branch and more brittleness in the descending branch compared to counterpart confined normal-weight concrete (NWC). To describe the rational stress-strain relationship of confined LWAC according to these trends, the concept of concrete brittleness number (ξb) was introduced. Specifically, ξb values were determined as constants in the existing size effect equation. The constants were fitted via regression analysis of 164 datasets compiled in extant studies. The models of elastic modulus, strength gain factor, strain at maximum stress, and strain at 85% of the maximum stress in descending branch were proposed, including ξb to describe the lower stiffness and more brittle behavior in confined LWAC when compared to those of counterpart confined NWC. Other existing models showed significant differences when compared with the test results in the descending behavior. These differences were significant in LWAC and counterpart NWC. Conversely, the proposed stress-strain relationship of confined concrete was in excellent agreement with the test results, irrespective of concrete type, compressive strength of concrete, and volumetric transverse reinforcement index.
Compressive Stress-Strain Model for Confined Lightweight Concrete Based on Brittleness Number
KSCE J Civ Eng
Yang, Keun-Hyeok (Autor:in) / Mun, Ju-Hyun (Autor:in) / Hwang, Seung-Hyeon (Autor:in)
KSCE Journal of Civil Engineering ; 25 ; 3041-3053
01.08.2021
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Compressive Stress-strain Model for Confined Lightweight Concrete Subjected to Short-term Loading
| British Library Conference Proceedings | 2009
Brittleness of Lightweight Aggregate Concrete
| British Library Conference Proceedings | 1995
| British Library Online Contents | 2016
Compressive stress-strain model for high-strength concrete confined with spirals
| British Library Conference Proceedings | 2010