Erratum for “Seismic Performance Assessment of Multitiered Steel Concentrically Braced Frames Designed in Accordance with the 2010 AISC Seismic Provisions” by Ali Imanpour, Robert Tremblay, Ali Davaran, Christopher Stoakes, and Larry A. Fahnestock

Imanpour, Ali; Tremblay, Robert; Davaran, Ali; Stoakes, Christopher; Fahnestock, Larry A.

doi:10.1061/(ASCE)ST.1943-541X.0001734

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Feb 9, 2017

Erratum for “Seismic Performance Assessment of Multitiered Steel Concentrically Braced Frames Designed in Accordance with the 2010 AISC Seismic Provisions” by Ali Imanpour, Robert Tremblay, Ali Davaran, Christopher Stoakes, and Larry A. Fahnestock

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Authors: Ali Imanpour, A.M.ASCE, Robert Tremblay, Ali Davaran, Christopher Stoakes, and Larry A. Fahnestock, M.ASCE https://orcid.org/0000-0003-3172-2260 [email protected]Author Affiliations

Publication: Journal of Structural Engineering

Volume 143, Issue 5

https://doi.org/10.1061/(ASCE)ST.1943-541X.0001734

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During composition, an error was introduced in Tables 2, 3, 4, and 6. The terms “Story drift,

Δ

” should be replaced by “Story drift/

Δ

.” The revised tables appear herein.

Table 2. Median Values of Peak Seismic Response Parameters for Frames 1, 2, and 4 from NLRH Analysis in Abaqus

Parameter	Frame 1	Frame 2	Frame 4
Story drift ( $% h$ )	2.09	1.88	1.34
Story drift/ $Δ$	2.38	1.66	1.07
Critical tier drift ( $% h_{c r}$ )	3.50	3.69	2.44
Number of column failure cases	6	4	1

Table 3. Median Values of Peak Seismic Response Parameters for the MT-BFs Studied

Parameter	Frame 1	Frame 2	Frame 3	Frame 4	Frame 5	Frame 6	Frame 7
Story drift ( $% h$ )	1.53	1.33	1.22	1.26	1.42	1.19	1.08
Story drift/ $Δ$	1.82	1.20	1.47	1.05	1.17	0.93	0.78
Critical tier drift ( $% h_{c r}$ )	2.52	2.71	1.70	2.76	2.17	2.89	2.09
DCF	1.66	2.05	1.40	2.14	1.47	2.09	1.97
${DCF}_{M}$	4.36	4.20	2.26	3.62	1.93	3.92	2.67
$M_{c y, \max} / M_{p y}$ at Tier 1	0.36	0.39	0.14	0.40	0.40	0.47	0.28
$M_{c y, \max} / M_{p y}$ at Tier 2	—	0.18	—	0.17	0.20	0.15	0.12
$M_{c y, \max} / M_{p y}$ at Tier 3	—	—	—	0.12	0.11	0.10	0.09
$M_{c y, \max} / M_{p y}$ at Tier 4	—	—	—	—	—	0.09	0.08
$M_{c y, \max} / M_{p y}$ at Tier 5	—	—	—	—	—	—	0.06
$P_{c, \max} / P_{n}$ in Tier 1	0.79	0.75	0.69	0.74	0.83	0.63	0.62
Number of column failure cases	5	5	5	1	2	0	0

Table 4. Statistics of Peak Seismic Response Parameters for the Four-Tiered CBF Example

Parameters	Statistics of converged analyses^a
Parameters	50th percentile	84th percentile	Minimum	Maximum
Story drift ( $% h$ )	1.26	1.80	0.57	2.97
Story drift/ $Δ$	1.05	1.50	0.47	2.47
Critical tier drift ( $% h_{c r}$ )	2.76	4.19	0.42	5.06
DCF	2.14	2.40	0.75	2.45
${DCF}_{M}$	3.62	4.74	0.77	4.96
$M_{c y, \max} / M_{p y}$ at Tier 1	0.40	0.70	0.17	1.21
$M_{c y, \max} / M_{p y}$ at Tier 2	0.17	0.17	0.10	0.19
$M_{c y, \max} / M_{p y}$ at Tier 3	0.12	0.14	0.09	0.16
$P_{c, \max} / P_{n}$ in Tier 1	0.74	0.75	0.63	0.77

a

Column failure was observed in one analysis.

Table 6. Median Values of Peak Seismic Response Parameters for Alternate Four-Tiered CBF Designs

Parameter	$R = 6.0$	$R = 4.0$	$R = 3.25$	$R = 8.0$	$R = 8.0$	$R = 6.0$
Parameter	$R = 6.0$	$R = 4.0$	$R = 3.25$	$β = 1.1$ ^a	$β = 1.2$ ^a	Fixed base columns^b
Story drift ( $% h$ )	1.26	1.23	1.11	1.43	1.40	1.25
Story drift/ $Δ$	1.05	0.77	0.97	1.15	1.12	1.05
Critical tier drift ( $% h_{c r}$ )	2.76	2.61	2.17	1.58	1.65	2.05
DCF	2.14	2.13	1.96	1.29	1.26	1.51
${DCF}_{M}$	3.62	3.59	2.94	1.25	1.41	2.75
$M_{c y, \max} / M_{p y}$ at Tier 1	0.40	0.38	0.28	0.16	0.16	0.41
$M_{c y, \max} / M_{p y}$ at Tier 2	0.17	0.17	0.18	0.10	0.13	0.22
$M_{c y, \max} / M_{p y}$ at Tier 3	0.12	0.12	0.10	0.11	0.13	0.15
$P_{c, \max} / P_{r}$ in Tier 1	0.74	0.77	0.77	0.51	0.55	0.75
Number of column failure cases	1	2	2	0	0	0

a

Tier 1 is critical.

b

Tier 2 is critical.

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Journal of Structural Engineering

Volume 143 • Issue 5 • May 2017

History

Received: Oct 20, 2016

Accepted: Oct 26, 2016

Published online: Feb 9, 2017

Published in print: May 1, 2017

Discussion open until: Jul 9, 2017

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Ali Imanpour, A.M.ASCE

Ph.D. Candidate, Dept. of Civil, Geological and Mining Engineering, Polytechnique Montreal, Montreal, QC, Canada H3C 3A7.

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Robert Tremblay

Professor, Dept. of Civil, Geological and Mining Engineering, Polytechnique Montreal, Montreal, QC, Canada H3C 3A7.

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Ali Davaran

Visiting Researcher, Dept. of Civil, Geological and Mining Engineering, Polytechnique Montreal, Montreal, QC, Canada H3C 3A7.

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Christopher Stoakes

Research Scientist, Dept. of Civil and Environmental Engineering, Univ. of Iowa, 4105 Seamans Center for the Engineering Arts and Sciences, 103 South Capitol St., Iowa City, IA 52242.

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Larry A. Fahnestock, M.ASCE https://orcid.org/0000-0003-3172-2260 [email protected]

P.E.

Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 North Mathews Ave., Urbana, IL 61801 (corresponding author). ORCID: https://orcid.org/0000-0003-3172-2260. E-mail: [email protected]

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Erratum for “Seismic Performance Assessment of Multitiered Steel Concentrically Braced Frames Designed in Accordance with the 2010 AISC Seismic Provisions” by Ali Imanpour, Robert Tremblay, Ali Davaran, Christopher Stoakes, and Larry A. Fahnestock

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