Abstract
Abstract The concrete open-web sandwich slab is composed of the vierendeel girders intersecting each other. The vierendeel girder are composed of the upper rib, lower rib and shear key. The upper and lower rib mainly bear the axial force, and the shear keys mainly bear the shear force. A double scalar elastic damage constitutive model considering shear damage was derived to accurately simulate the mechanical property of the shear key in which one scalar reflected the volume damage, and the other one reflected the shear damage. The damage constitutive model in the study, the uniaxial tension and compression damage constitutive model (GB50010 (2015)), and the double scalar elastic damage constitutive model of tension and compression (Liu (2021)) were compared by simulating the shear key. The results showed that the elastic damage constitutive model proposed in the study can be used for the mechanical property analysis of the shear key and can better evolve the damage development of the shear key. The damage constitutive calculation model can be provided for the analysis of the vierendeel girder and the open-web sandwich slab.
Highlights
In recent years, due to the high integration of industrial production and the requirement of saving land resources, the demand for multi-story large-span building structures has increased rapidly
The reinforced concrete open-web sandwich slab is composed of vierendeel girders intersecting each other, which has the characteristics of lightweight, low steel consumption, and small structure height (Heilongjiang Provincial Department of Housing and Urban-Rural Development, 2014)
The elastic damage constitutive model was established by the UMAT interface in Abaqus and the bearing capacity of the shear key of the vierendeel girder was analyzed
Summary
Due to the high integration of industrial production and the requirement of saving land resources, the demand for multi-story large-span building structures has increased rapidly. The elastic damage constitutive model was established by the UMAT interface in Abaqus and the bearing capacity of the shear key of the vierendeel girder was analyzed. In Section (4) through the normal stress-line strain curve of C45 concrete in uniaxial tension and uniaxial compression in the Chinese Code for Design of Concrete Structures (China Building Industry Press, 2015), and the shear stress-shear strain curve of Guo (2013), the damage evolution parameters of the double scalar elastic damage constitutive model are determined. The results show that the elastic damage constitutive model in the study can better evolve the damage development of the shear key, and can be used for simulation of concrete under tension, compression, and shear deformation. The evolution expressions of volume damage variable 1 and shear damage variable 2 are defined as respectively:
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