Hybrid Post-Tensioned Precast Concrete Walls for Use in Seismic Regions

Kurama, Yahya C.

doi:10.15554/pcij.09012002.36.59

Cited by 127 publications

(63 citation statements)

References 12 publications

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“…Vertical unbonded PT bars or tendons provide a positive stiffness after gap opening, as well as a restoring force mechanism, as the PT force acts to close the gap. The lateral load behavior of this system was demonstrated through large-scale experiments [54,[62][63][64]. Experimental results show that the unbonded post-tensioned precast concrete walls self-center and demonstrate better performance than conventional precast concrete shear walls (e.g., [63]).…”

Section: Post-tensioned Concrete Shear Wallsmentioning

confidence: 98%

“…A number of energy dissipation sources have been studied for unbonded post-tensioned precast concrete walls, including: mild reinforcing steel across the horizontal joints [62], U-shaped flexural plate connectors between two adjacent shear walls [65], dog-bone shaped energy dissipators [66], and small external energy dissipation devices that act similar to buckling restrained braces [67]. Friction damping between adjacent walls can also be used to dissipate energy [41].…”

Section: Post-tensioned Concrete Shear Wallsmentioning

confidence: 99%

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Self-Centering Seismic Lateral Force Resisting Systems: High Performance Structures for the City of Tomorrow

et al. 2014

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Abstract:Structures designed in accordance with even the most modern buildings codes are expected to sustain damage during a severe earthquake; however; these structures are expected to protect the lives of the occupants. Damage to the structure can require expensive repairs; significant business downtime; and in some cases building demolition. If damage occurs to many structures within a city or region; the regional and national economy may be severely disrupted. To address these shortcomings with current seismic lateral force resisting systems and to work towards more resilient; sustainable cities; a new class of seismic lateral force resisting systems that sustains little or no damage under severe earthquakes has been developed. These new seismic lateral force resisting systems reduce or prevent structural damage to nonreplaceable structural elements by softening the structural response elastically through gap opening mechanisms. To dissipate seismic energy; friction elements or replaceable yielding energy dissipation elements are also included. Post-tensioning is often used as a part of these systems to return the structure to a plumb; upright position (self-center) after the earthquake has passed. This paper summarizes the state-of-the art for self-centering seismic lateral force resisting systems and outlines current research challenges for these systems. OPEN ACCESSBuildings 2014, 4 521

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Section: Post-tensioned Concrete Shear Wallsmentioning

confidence: 98%

Section: Post-tensioned Concrete Shear Wallsmentioning

confidence: 99%

Self-Centering Seismic Lateral Force Resisting Systems: High Performance Structures for the City of Tomorrow

et al. 2014

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“…In general, the behaviour of the dissipative post-tensioned rocking mechanism can be obtained by combination of a non-linear elastic and an elastic-plastic (with hardening) hysteresis, resulting into a peculiar self-centering and dissipative flag-shape hysteresis loop as shown in Figure 1b. After the first development of PRESSS-technology for both frames and wall systems (Priestley et al, 1999), further research and development has been carried out on the wall solution (Kurama et al, 1999;Kurama, 2000;Kurama, 2002;Holden et al, 2003;Morgen et al, 2007;Marriott et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Development and Testing of an Alternative Dissipative Posttensioned Rocking Timber Wall with Boundary Columns

2016

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The unbonded post-tensioned rocking and dissipative technology was first developed as the main outcome of the PRESSS (PREcast Seismic Structural Systems) Program in US.After the first developments and significant refinement, the technology was extended to steel and, more recently, timber structures. The timber version, referred to as Pres-Lam (Prestressed laminated) system can be either implemented for timber walls (single or coupled) or frames or combination of the above, with unbonded post-tensioning and supplemental dissipation devices.In unbonded post-tensioned dissipative wall systems a combination of re-centering capacity and energy dissipation leads to a "controlled rocking" mechanism which develops a gap opening at the wall base. This generates an uplift displacement which is transferred to the floor diaphragm. This vertical displacement incompatibility can represent a potential issue if the connection detailing between floor and lateral resisting system is not designed properly.The same issue can be mitigated by adopting an alternative configuration of the rocking/dissipative wall system, based on the use of a column-wall-column post-tensioned connection. This concept, originally proposed for precast concrete walls and referred to as PreWEC (Prestressed Wall with End Column), has been extended and adapted to posttensioned timber structures and validated through experimental testing.

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“…Experimental research was conducted on single rocking and hybrid wall panels under both quasi-static [6][7][8] and dynamic loading [9] proving the good performance of these systems if detailed appropriately. The dynamic interaction between rocking and hybrid walls and the rest of the structure was investigated during the DSDM project [10] in which shake table tests were conducted on a three story half-scale precast concrete structure whose lateral force resisting system consisted entirely on rocking and hybrid walls [11,12].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modeling of “Rocking Walls”

Belleri¹,

Torquati²,

Riva³

2014

Proceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Hybrid Post-Tensioned Precast Concrete Walls for Use in Seismic Regions

Cited by 127 publications

References 12 publications

Self-Centering Seismic Lateral Force Resisting Systems: High Performance Structures for the City of Tomorrow

Self-Centering Seismic Lateral Force Resisting Systems: High Performance Structures for the City of Tomorrow

Development and Testing of an Alternative Dissipative Posttensioned Rocking Timber Wall with Boundary Columns

Finite Element Modeling of “Rocking Walls”

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Hybrid Post-Tensioned Precast Concrete Walls for Use in Seismic Regions

Cited by 127 publications

References 12 publications

Self-Centering Seismic Lateral Force Resisting Systems: High Performance Structures for the City of Tomorrow

Self-Centering Seismic Lateral Force Resisting Systems: High Performance Structures for the City of Tomorrow

Development and Testing of an Alternative Dissipative Posttensioned Rocking Timber Wall with Boundary Columns

Finite Element Modeling of “Rocking Walls”

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Product

Resources

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Finite Element Modeling of “Rocking Walls”