Displacement ductility of staged construction-steel tube-reinforced concrete columns

Yuan, Huang; Hong, Huanpeng; Deng, Huang; Bai, Yu

doi:10.1016/j.conbuildmat.2018.08.141

Cited by 15 publications

(5 citation statements)

References 39 publications

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“…Currently, the coulomb friction stands out as a widely accepted method to emulate the contact behavior between the steel pipe and concrete. The reliability of this method has been substantiated by pertinent research studies [34,35]. As a result, an interface model combining the "hard" contact model in the normal direction and the coulomb friction model in the tangential direction is used to replicate the interaction behavior between the concrete and the steel tube in the paper.…”

Section: Contact Relation and Boundary Conditionsmentioning

confidence: 99%

Eccentric Compression Performance of Core-Steel Tube with T-Shaped Steel Reinforced Concrete Column

Gao,

Wang,

You

2024

Advances in Civil Engineering

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This paper introduces a novel steel–concrete composite column referred to as the core-steel tube with T-shaped steel reinforced concrete (CSTRC) column, which is composed of a core steel tube with T-shaped steel embedded in a reinforced concrete column. To investigate the mechanical performance of the CSTRC column under eccentric compressive load, the load–deformation response, stress, and strain distribution of CSTRC columns under eccentric load are analyzed by finite element software. Furthermore, the effects of slenderness ratio, concrete and steel strength on the eccentric compression performance of CSTRC columns are also discussed. Finally, a set of formulas for predicting the ultimate strength of the CSTRC columns is proposed. The study results reveal that: (1) The established finite element model accurately predicts bearing capacity and strain development. (2) When the eccentricity is 0.2, the specimen exhibits characteristics indicative of small eccentricity failure. Conversely, when the eccentricity is 0.8, the specimen demonstrates traits associated with large eccentricity failure. Furthermore, as the eccentricity increases, there is a notable decrease in the bearing capacity of the specimen. (3) The slenderness ratio affects the failure mode of the CSTRC columns, with consideration for second-order effects necessary when the ratio exceeds 22. (4) Increasing the concrete strength, steel strength, and steel ratio significantly enhances the ultimate load values of the CSTRC columns. (5) A comparison between calculated and simulated values demonstrates good agreement, validating the accuracy of the proposed method.

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Section: Contact Relation and Boundary Conditionsmentioning

confidence: 99%

Eccentric Compression Performance of Core-Steel Tube with T-Shaped Steel Reinforced Concrete Column

Gao,

Wang,

You

2024

Advances in Civil Engineering

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“…Ductility is defined as ratio of ultimate deformation to yield deformation [12,13]. Ductility displacement is related to both the structural configuration and the cross section behavior.…”

Section: Ductility Demandmentioning

confidence: 99%

Ductility Improvement of R.C Beams with Large Web opening by using Reactive Powder Concrete Layers

Jarallah

Jassim

2018

Tikrit j. eng. sci.

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In this investigation the effect of large web opening on the on the behaver of beams made by normal concrete (NC) and reactive powder concrete (RPC) have been studied. The experimental work consists of casting and testing in flexure 12 rectangular simply supported reinforced concrete beams. The main parameters of this test are opening locations and normal concrete and RPC location with is the section. The ultimate loads, cracking loads, load -deflection behavior, skew of the openings (deflection at the two opposite corners of openings) and ductility were discussed. These results showed that increase ultimate loads (Pu) and stiffness by increase RPC layers. The using RPC layers increase ultimate load about (1-30) %. Using RPC in compression fiber is found to be more effective than using RPC in tension fiber. The cracking load of hybrid beam with one layer of RPC in compression fiber (having one opening) higher than NC beams by 48.5%. The ultimate strength was decreases with increases opening about (4-21)%, thus indicating that the stiffness decreases accordingly. Hybrid beams with RPC in tension fiber failed with less crack than those for hybrid beams with RPC in compression fiber at the same number of openings. The skew at opening of flexural zone show greater values than the skew at opening in shear zone for each beam until failure. The increase in the number of openings leads to increase in the ductility because it reduces the strength of beams.

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“…Also, monolithic elevated water tanks have relatively high strength and stiffness but lack ductile characteristics. Ductile behaviour in the RC shafts is achieved by yielding reinforcement at the shaft base and forming plastic hinges 5 . Due to low redundancy and poor ductility in thin reinforced concrete shafts, considerable damage in the hollow RC shaft during a strong seismic event may result in total collapse or affect the functionality of EWT 6 .…”

Section: Introductionmentioning

confidence: 99%

Effects of innovative reinforced concrete slit shaft configuration on seismic performance of elevated water tanks

Gurkalo,

He,

Poutos

et al. 2024

Sci Rep

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Elevated water tanks are considered crucial infrastructure due to their significant role in supporting essential services. A strong ground motion may result in a failure or significant damage to a reinforced concrete shaft of an elevated water tank because hysteric energy dissipation is limited to the formation of plastic hinges at the base of the shaft, while the nonlinear properties of the rest of the shaft remain underutilised. The innovative system of assembling RC shafts for elevated water tanks using a slit wall technique was developed to enhance energy dissipation along with the shaft height by introducing slit zones. The comparative nonlinear dynamic analysis between three-dimensional models of elevated water tanks with different shaft diameters and heights was conducted using SAP2000 software. The results of elevated water tanks with slit and solid reinforced concrete shafts were compared. The research findings showed that during a seismic event, the slit zones increased the ductility of the shaft, reduced stress concentration in the lower part of the shaft, and provided uniform stress distribution throughout the shaft's height. The effect of the innovative system is especially noticeable in the elevated water tanks with tall and slender shafts.

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Displacement ductility of staged construction-steel tube-reinforced concrete columns

Cited by 15 publications

References 39 publications

Eccentric Compression Performance of Core-Steel Tube with T-Shaped Steel Reinforced Concrete Column

Eccentric Compression Performance of Core-Steel Tube with T-Shaped Steel Reinforced Concrete Column

Ductility Improvement of R.C Beams with Large Web opening by using Reactive Powder Concrete Layers

Effects of innovative reinforced concrete slit shaft configuration on seismic performance of elevated water tanks

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