Concrete Columns with Lateral Prestressing

Cheong, Hee Kiat; Perry, S. H.

doi:10.1061/(asce)0733-9399(1991)117:1(70)

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…Active confinement-the most effective way of confining concrete-improves the tri-axial stress state and leads to significantly higher strength and ductility (e.g., see Gardner et al [1992], Perry et al [1987], Cheong and Perry [1991], Martin [1968], Chen et al [1985], Ghali et al [1974], Krstulovic-Opara and Kotsovos [1993]). Up to now the only practical way for actively confining concrete was by lateral prestressing, which is not practical for field implementation.…”

Section: Self-induced Active Confinementmentioning

confidence: 99%

Self–Actuating SMA–HPFRC Fuses for Auto–Adaptive Composite Structures

Krstulovic-Opara

Nau

Wriggers

et al. 2003

Computer aided Civil Eng

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Existing experimental results clearly demonstrate that the structural use of conventional, that is, "passive," high-performance fiber reinforced concretes (HPFRCs) results in excellent seismic performance. By combining shape memory alloy (SMA) fibers with conventional HPFRCs, self-actuating HPFRCs were recently developed. This paper explores a novel way of using such self-actuating SMA-based HPFRCs to develop more seismically resistant and cost-effective, auto-adaptive frame buildings. A numerical investigation on the use of selfactuating HPFRCs in highly energy absorbing, replaceable, "fuse" zones is presented first. Resulting SMA-HPFRC "fuses" can adjust their response to the level of seismic overload. A brief discussion of the possible use of such self-actuating "fuses" in auto-adaptive structures is also provided. While in an actual auto-adaptive structure "triggering" of the desired self-actuating HPFRC fuse behavior will require the use of "sensing" and control elements, this paper focuses only on the behavior of SMA-HPFRC fuses and their effect on the overall structural response.

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Section: Self-induced Active Confinementmentioning

confidence: 99%

Self–Actuating SMA–HPFRC Fuses for Auto–Adaptive Composite Structures

Krstulovic-Opara

Nau

Wriggers

et al. 2003

Computer aided Civil Eng

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“…Passive confining pressure develops as a result of concrete dilation during loading. However, previous research demonstrates that active confinement is much more superior to passive confinement (Cheong and Perry 1991;Krstulovic-Opara and Thiedeman 2000). This is owing to the active confining pressure applied on the concrete before loading and has been proved to be more effective in delaying the dilation of concrete structures.…”

mentioning

confidence: 98%

Plasticity Modeling of Concrete Confined With NiTiNb Shape Memory Alloy Spirals

Chen

Andrawes

2017

Structures

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Concrete confinement is proved to be an effective method to improve concrete strength and ductility. In recent years, a novel confinement technique using NiTiNb shape memory alloy (SMA) spirals was proposed and proved to be promising for seismic retrofit of concrete structures. Despite the experimental work that has been done in this area, there is few computational tools available that are capable of describing the three-dimensional constitutive behavior of NiTiNb-SMA confined concrete. This paper proposes a plasticity-based NiTiNb-SMA confined concrete constitutive model, which is capable of predicting and simulating three-dimensional stressstrain behavior of NiTiNb-SMA confined concrete under both monotonic and cyclic loading. New hardening/softening function, dilation rate function and damage parameter are derived and validated based on experimental results. The proposed model is able to closely simulate the axial and lateral stress-strain behaviors of NiTiNb-SMA confined concrete when compared to experimental results.

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“…Self-Induced Active Confinement: Active confinementthe most effective way of confining concreteimproves the tn-axial stress state and leads to significantly higher strength and ductility [60][61][62][63][64][65][66][67][68][69][70][71][72]. Up to now the only practical way for introducing active confinement was by lateral prestressing, which is not very practical for field implementation.…”

mentioning

confidence: 99%

<title>Self-actuating fiber composites for auto-adaptive structures</title>

2001

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This paper explores a novel approach in developing auto-adaptive, High-Performance Fiber Reinforced Concrete (HPFRC) based composite structures. This is achieved through the selective use of hybrid, self-actuating, Shape Memory Alloy (SMA) -HPFRC composites (SMA-HPFRCCs). Previous use of "passive" HPFRCs in seismic retrofit and new construction resulted in excellent seismic performance. By combining "passive" FRC fibers with continuous or discontinuous SMA fibers, self-actuating SMA-HPFRCCs that can change their stress-strain response during loading, were recently developed. The paper presents results of a numerical investigation on the use of such SMA-HPFRCCs to develop highly energy absorbing, replaceable, "fuse" zones that adjust their response to the level of overload, and thus optimize overall system response to the different levels of seismic excitations. A model-based simulation ofthe self-actuating HPFRC fuse response is presented first, followed by a discussion of its possible use in auto-adaptive structures. While in an actual auto-adaptive structure "triggering" of the desired self-actuating fuse behavior will require the use of 'sensing' and control elements, the paper focuses only on the behavior of SMA-HPFRCC fuses.

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Concrete Columns with Lateral Prestressing

Cited by 5 publications

References 6 publications

Self–Actuating SMA–HPFRC Fuses for Auto–Adaptive Composite Structures

Self–Actuating SMA–HPFRC Fuses for Auto–Adaptive Composite Structures

Plasticity Modeling of Concrete Confined With NiTiNb Shape Memory Alloy Spirals

<title>Self-actuating fiber composites for auto-adaptive structures</title>

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