On the Seismic Design of Structures with Tilting Located within a Seismic Region

Valenzuela-Beltran, Federico; Ruiz, Sonia E.; Reyes‐Salazar, Alfredo; Gaxiola‐Camacho, J. Ramon

doi:10.3390/app7111146

Cited by 3 publications

(3 citation statements)

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“…Moment-curvature analysis is required to determine the behavior of a reinforced concrete cross-section in the cracking, elastic, and plastic regions; to determine the deformation demands in specific limit states (such as serviceability, damage control, and life-safety) between the yield and ultimate conditions; and to determine the force-deformation-ductility relationships of members. However, moment-curvature analysis is also a useful tool for checking whether or not tension reinforcements are ruptured, compression reinforcements are bucked, compression concrete block is crushed, and the member's shear capacity is exceeded for the stipulated limit state [23].…”

Section: Determination Of Equivalent Yield Curvaturementioning

confidence: 99%

“…Moment-curvature analysis is required to determine the behavior of a reinforced concrete cross-147 section in the cracking, elastic, and plastic regions; to determine the deformation demands in specific 148 limit states (such as serviceability, damage control, and life-safety) between the yield and ultimate 149 conditions; and to determine the force-deformation-ductility relationships of members. However, 150 moment-curvature analysis is also a useful tool for checking whether or not tension reinforcements 151 are ruptured, compression reinforcements are bucked, compression concrete block is crushed, and 152 the member's shear capacity is exceeded for the stipulated limit state[23].For the ductility calculation at a cross-section level, the moment-curvature response can be by extrapolating the line up to the nominal moment capacity (point C). Therefore, the plastic branch 158 of the response comes into view when combining the equivalent yield point (ϕy, MN) and ultimate 159 point (ϕu, Mu) (Figure 4).…”

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Investigation of Parameters Affecting the Equivalent Yield Curvature of Reinforced Concrete Columns

Hasgül

2020

Materials

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In this study, the response quantities affecting the equivalent yield curvature, which is important in the deformation-based seismic design and assessment of structural systems, are investigated for reinforced concrete columns with a square cross-section. In this context, the equivalent yield curvatures were determined by conducting moment–curvature analyses on various column models, in which the axial load level, cross-section dimension, longitudinal reinforcement ratio, and concrete compression strength were changed parametrically, and the independent and/or combined effects of the relevant parameters were discussed. Depending on the axial load levels of P/Agfc′ < 0.3, P/Agfc′ = 0.3, and P/Agfc′ > 0.3 for the considered columns, the yielding of reinforcement, yielding of reinforcement and/or concrete crushing, and concrete crushing governed the yield conditions, respectively. It can be noted that the cross-section dimension and axial load level became the primary parameters. Even though the independent effects with regard to particular parameters remained at minimal levels, the combined effects of them with the axial load became important in terms of the equivalent yield curvature.

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Section: Determination Of Equivalent Yield Curvaturementioning

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Investigation of Parameters Affecting the Equivalent Yield Curvature of Reinforced Concrete Columns

Hasgül

2020

Materials

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“…More recently Reyes-Salazar et al [39], studied the ductility reduction factor for buildings with moment resisting steel frames (MRSF) which were modeled as complex MDOF systems, considering an intermediate level of inelastic structural deformation. Valenzuela-Beltran et al [40] proposed a reliability-based criterion including two simplified mathematical expressions, which depends on the ductility of the structural system, to estimate strength amplification factors for buildings with asymmetric yielding. Fanaie and Shamlou [41] studied the seismic behavior, in terms of response modification factor and ductility factor, of mixed structures.…”

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Local, Story, and Global Ductility Evaluation for Complex 2D Steel Buildings: Pushover and Dynamic Analysis

et al. 2019

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A numerical investigation regarding ductility evaluation of steel buildings with moment resisting steel frames is conducted. Bending (µLϕ) and tension (µLδ) local ductilities as well as story (µS) and global ductilities are studied. Global ductility is calculated as the mean values of story ductilities (µGS) and as the ratio of the maximum inelastic to yielding top displacements (µGt). The ductility capacity is associated to drifts of about 5%. Ductility values significantly may vary with the strong motion, ductility definition, structural element, story number, type of analysis, and model. µLϕ is much larger for beams than for columns. Even though the demands of µLδ are considered an important issue they are less relevant than µLϕ. µS is much smaller than µLϕ for beams. µGS for dynamic analysis give reasonable values, but µGt does not. µLϕ, µS and µGS obtained from pushover are larger than those obtained from dynamic analysis and unlike the case of dynamic analysis, µLϕ tend to increase with the story number showing an opposite trend. Considering that: µGt for dynamic analysis results in unreasonable values, pushover analysis does not consider energy dissipation, the strong column–weak beam (SCWB) concept was followed in the model designs, and µLδ is not relevant in framed steel buildings, the ratio (RLG) of global to local ductility capacity is calculated as the ratio of µGS to µLϕ of beams, for dynamic analysis. A value of 1/3 is proposed. Thus, if bending local ductility capacity is stated as the basis for the design, the global ductility capacity can be easily estimated.

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Lessons Learned from Two Earthquakes That Afflicted Mexico City—After a Pause of 32 Years

2022

Lifelines 2022

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On the Seismic Design of Structures with Tilting Located within a Seismic Region

Cited by 3 publications

References 34 publications

Investigation of Parameters Affecting the Equivalent Yield Curvature of Reinforced Concrete Columns

Investigation of Parameters Affecting the Equivalent Yield Curvature of Reinforced Concrete Columns

Local, Story, and Global Ductility Evaluation for Complex 2D Steel Buildings: Pushover and Dynamic Analysis

Lessons Learned from Two Earthquakes That Afflicted Mexico City—After a Pause of 32 Years

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