Proposal of a simplified criterion to estimate second order global effects in reinforced concrete buildings

CUNHA, R. N.; MENDES, L. A.; AMORIM, D. L. N. F.

doi:10.1590/S1983-41952020000200002

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Revista IBRACON de Estruturas e Materiais

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Articles • Rev. IBRACON Estrut. Mater. 13 (02) • Mar-Apr 2020 • https://doi.org/10.1590/S1983-41952020000200002 copy

Proposal of a simplified criterion to estimate second order global effects in reinforced concrete buildings

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This work proposes a new simplified parameter for the calculation of second order global effects, based on the Galerkin’s Method by Weighted Residuals. The proposed criterion was analysed based on 21 planar frames associated with shear wall, reaching results that present satisfactory accuracy compared to the second order global analysis, even for cases where the γ_z coefficient is greater than 1.30.

Keywords:
second order global effects; reinforced concrete; weighted residuals; Galerkin's method

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E-mail: arlene@ibracon.org.br

Acompanhe os números deste periódico no seu leitor de RSS

Planar frame	Model	L [m]	Shear wall (b × h)
1	1	48	4.00 × 0.20
2	2	24	1.50 × 0.25
3	2	30	1.50 × 0.25
4	1	54	4.00 × 0.20
5	1	51	4.00 × 0.20
6	2	36	2.00 × 0.25
7	2	42	2.00 × 0.25
8	1	66	4.00 × 0.20
9	1	75	4.00 × 0.20
10	1	81	4.00 × 0.20
11	1	78	4.00 × 0.20
12	1	84	4.00 × 0.20
13	2	39	2.00 × 0.25
14	1	69	4.00 × 0.20
15	1	78	4.00 × 0.25
16	1	81	4.00 × 0.25
17	1	84	4.00 × 0.25
18	1	81	4.00 × 0.29
19	1	84	4.00 × 0.30
20	1	87	4.00 × 0.30
21	1	78	4.00 × 0.23

Planar frame	γ_z	M₂/M₁	κ_o	κ_p
1	1.12	1.48	0.78	0.77
2	1.19	1.67	0.73	0.71
3	1.32	2.67	0.53	0.52
4	1.15	1.71	0.69	0.70
5	1.13	1.58	0.72	0.74
6	1.29	2.49	0.55	0.54
7	1.46	6.46	0.24	0.24
8	1.24	1.96	0.65	0.64
9	1.33	2.81	0.50	0.50
10	1.41	4.20	0.36	0.36
11	1.37	3.34	0.43	0.43
12	1.45	5.75	0.27	0.27
13	1.36	3.40	0.43	0.43
14	1.26	2.16	0.59	0.60
15	1.33	2.96	0.48	0.48
16	1.37	3.58	0.41	0.41
17	1.41	4.62	0.33	0.33
18	1.35	3.26	0.44	0.44
19	1.38	3.95	0.37	0.38
20	1.42	5.26	0.29	0.29
21	1.35	3.10	0.46	0.46
			NSE	0.997