Design Concepts for Damage-Free Seismic-Resistant Self-Centering Steel Concentrically Braced Frames

Roke, David A.; Sause, Richard; Ricles, James M.; Gonner, Nathaniel

doi:10.1061/41031(341)155

Cited by 80 publications

(63 citation statements)

References 6 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculation of OM D is explained further in Roke et al [2]. The values of OM elastic and OM D are shown in Table 5 for each archetype SC-CBF studied in this paper.…”

Section: Archetype Sc-cbf Designsmentioning

confidence: 97%

“…However, a few changes to the conventional CBF provide the SC-CBF with larger drift capacity and self-centering behavior after a significant earthquake [1,2]. The first significant change is that the SC-CBF column bases are not vertically anchored to the foundation; they are free to uplift and allow the SC-CBF to rock at its base during the earthquake.…”

Section: Sc-cbf System and Behaviormentioning

confidence: 99%

“…The results of this study are covered extensively in references [2,3,4]. The testing program used the hybrid simulation technique [5] and simulations were performed pseudo-dynamically.…”

Section: Sc-cbf System and Behaviormentioning

confidence: 99%

“…Most studies of the SC-CBF concept or variants of the concept are limited to structures 6-stories or less in height [1,2,6,7,8,9,10]. This paper addresses the behavior of SC-CBFs at many aspect ratios, including structures up to 18 stories.…”

Section: Sc-cbf System and Behaviormentioning

confidence: 99%

“…Steel Self-Centering Concentrically-Braced Frames (SC-CBFs) are a new type of seismic lateral force resisting system that are intended to reduce or eliminate the damage and residual drift often associated with conventional concentrically braced frames (CBFs) under the design basis earthquake (DBE) [1,2]. The SC-CBF system increases the drift capacity of the CBF by allowing the CBF to rock on its foundation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Seismic Response of Post-Tensioned Steel Rocking Concentrically Braced Frames With Various Aspect Ratios

Chancellor¹,

Sause²,

Ricles³

et al. 2014

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

View full text Add to dashboard Cite

show abstract

“…The calculation of OM D is explained further in Roke et al [2]. The values of OM elastic and OM D are shown in Table 5 for each archetype SC-CBF studied in this paper.…”

Section: Archetype Sc-cbf Designsmentioning

confidence: 97%

Section: Sc-cbf System and Behaviormentioning

confidence: 99%

“…The results of this study are covered extensively in references [2,3,4]. The testing program used the hybrid simulation technique [5] and simulations were performed pseudo-dynamically.…”

Section: Sc-cbf System and Behaviormentioning

confidence: 99%

Section: Sc-cbf System and Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seismic Response of Post-Tensioned Steel Rocking Concentrically Braced Frames With Various Aspect Ratios

Chancellor¹,

Sause²,

Ricles³

et al. 2014

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

View full text Add to dashboard Cite

show abstract

Mechanisms to limit higher mode effects in a controlled rocking steel frame. 1: Concept, modelling, and low‐amplitude shake table testing

Wiebe

Christopoulos

Tremblay

et al. 2012

Earthq Engng Struct Dyn

104

View full text Add to dashboard Cite

SUMMARY Controlled rocking steel frames have been proposed as an efficient way to avoid the structural damage and residual deformations that are expected in conventional seismic force resisting systems. Although the base rocking response is intended to limit the force demands, higher mode effects can amplify member design forces, reducing the viability of the system. This paper suggests that seismic forces may be limited more effectively by providing multiple force‐limiting mechanisms. Two techniques are proposed: detailing one or more rocking joints above the base rocking joint and providing a self‐centring energy dissipative (SCED) brace at one or more levels. These concepts are applied to the design of an eight‐storey prototype structure and a shake table model at 30% scale. A simple numerical model that was used as a design tool is in good agreement with frequency characterization and low‐amplitude seismic tests of the shake table model, particularly when multiple force‐limiting mechanisms are active. These results suggest that the proposed mechanisms can enable better capacity design by reducing the variability of peak seismic force demands without causing excessive displacements. Similar results are expected for other systems that rely on a single location of concentrated nonlinearity to limit peak seismic loads. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

A cantilever beam analogy for quantifying higher mode effects in multistorey buildings

Wiebe

Christopoulos

2015

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Summary This paper examines higher mode effects in systems where the ductile mechanism for seismic design is the base moment‐rotation response. The modal properties of flexural and shear beams with uniform mass and elasticity and with a variable amount of base rotational restraint are derived. As the base fixity is released, the first mode becomes the rigid body rotation of the beam about the base, but the higher modes change much less, particularly for the shear beam model. Most response quantities that are of interest in the seismic design of typical mid‐rise buildings are controlled by the first two lateral modes, except at locations along the height where the second mode contributes little. However, the third and higher lateral modes are more significant for high‐rise buildings. Based on the theory of uniform cantilever shear beams, expressions are developed to avoid the need for a modal analysis to estimate the overturning moment, storey shear, and floor acceleration envelopes. Considering the measured response from the shake table testing of a large‐scale eight‐storey controlled rocking steel braced frame, the proposed expressions are shown to be of similar or better accuracy to a modified modal superposition technique, which combines the higher mode response from an elastic modal analysis with the response associated with achieving the maximum base overturning moment according to an inverted triangular load distribution. Because the proposed method uses only parameters that are available at the initial design stage, avoiding the analysis of a structural model, it is likely to be especially useful for preliminary design. Copyright © 2015 John Wiley & Sons, Ltd.

show abstract

Design Concepts for Damage-Free Seismic-Resistant Self-Centering Steel Concentrically Braced Frames

Cited by 80 publications

References 6 publications

Seismic Response of Post-Tensioned Steel Rocking Concentrically Braced Frames With Various Aspect Ratios

Seismic Response of Post-Tensioned Steel Rocking Concentrically Braced Frames With Various Aspect Ratios

Mechanisms to limit higher mode effects in a controlled rocking steel frame. 1: Concept, modelling, and low‐amplitude shake table testing

A cantilever beam analogy for quantifying higher mode effects in multistorey buildings

Contact Info

Product

Resources

About