Component-level Performance-based Seismic Assessment and Design Approach for Concrete Moment Frames

Xinxian, Zhou; Han, Xiaolei; Ji, Jing; Qi, Yong-le; Hang, Chao

doi:10.2174/1874149501610010025

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The third category is the one where the steel is used independently as LLRS, while the timber is only used as the gravity load resisting system (GRLS). Examples are steel momentresisting frames [8], steel braced frames [9], steel buckling-restrained braced frames (BRBFs), all used in combination with a timber building. Despite the extensive research into the seismic performance of novel hybrid steel-timber systems, there is still an urgent need to understand the seismic response of conventional steel concentrically braced frames (CBFs) combined with the timber gravity load resisting system consisting of glulam beams and columns plus CLT panels commonly used in building construction in North America [10,11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Seismic Response of an Innovative Hybrid Steel‐Timber Structure

Mowafy¹,

Imanpour²,

Chui³

2021

ce papers

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This study evaluates the seismic response of an advanced hybrid steel‐timber structure using a nonlinear static and dynamic analyses. A three‐story prototype building located in Vancouver, BC, Canada was designed first. The gravity load resisting system (GLRS) consists of cross‐laminated timber (CLT) floor slabs, glulam beams, and glulam columns. The lateral load resisting system (LLRS) includes a chevron‐type steel Concentrically Braced Frame. The numerical model of the structure was then developed in the OpenSees program. Nonlinear hysteresis response of steel braces and timber joints were explicitly simulated. The results of the analysis revealed that the hybrid structure possess an acceptable lateral stiffness while providing sufficient ductility to dissipate seismic energy. No unsatisfactory response was observed in the timber system.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Seismic Response of an Innovative Hybrid Steel‐Timber Structure

Mowafy¹,

Imanpour²,

Chui³

2021

ce papers

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“…As the main lateral force and moment-resisting elements, the ductile deformation capacity of RC columns is a key factor for achieving the better seismic performance of the structures (Cheng et al, 2017). One of the most important steps of performance-based assessment procedures of RC buildings relies on the comparison of deformations obtained from nonlinear structural analyses with deformation performance limits, or acceptance criteria in other words (Xinxian et al, 2016;Yakut & Solmaz, 2012).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Deformation-Based Damage Limits of RC Columns for Different Seismic Codes

Foroughi¹,

Yüksel

2021

JER is an international, peer-reviewed journal that publishes f

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The seismic performance of reinforced-concrete columns is related to the expected damage limits under seismic loads and how this damage relates to safety of the structure. In order to assess the performance of reinforced-concrete columns under seismic loads, performance-based deformation and damage limits are proposed by the seismic codes. Adequacy of the deformation and damage limit levels given in the codes such as Seismic Evaluation and Retrofit of Existing Buildings Standard, ASCE/SEI-41 (2017) and Turkish Building Earthquake Code (2018) were evaluated by carrying out parametric studies for RC columns. Reinforced-concrete circular columns are designed in parametric studies to present the effects of various parameters such as concrete compressive strength, axial load levels and spiral reinforcement ratio on performance-based damage limits. Performance limits corresponding to each performance levels obtained by different seismic guidelines were compared. When the results obtained from the analyzes are examined, it has been observed that there are significantly different results in the cross-section damage limits values of ASCE/SEI-41 (2017) and TBEC (2018) regulation, which can change the performance level of the building. TBEC (2018) gives approximately 50% conservative limitations when they are compared with the ASCE/SEI-41 (2017) limitations. As a result, TBDY (2018) seems to offer safer and ductile solutions than ASCE ASCE/SEI-41 (2017).

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Assessing the Dynamic Behaviour of Midrise Frame Structures Sitting on Silty Sandy Soil

Ismail¹,

Kaddah²,

Raphaël³

2020

TOCIEJ

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Background: Midrise 5 to 15 storeys frame structures sitting on soft soils are susceptible to damage induced by seismic events. The level of damage is related to the interaction between the structure, foundation and soil called Soil Structure Interaction (SSI). If the level of ground acceleration is low, the wave gets amplified putting the structure at risk of collapse. Objective and Methods: Concerns about SSI have motivated several researchers to investigate the seismic behaviour of structures rested on cohesive and cohesionless soils. The objective of the work presented in this paper is to evaluate the effects of several parameters on the seismic soil structure interaction behaviour of midrise structures sitting on silty sandy soil. Using ABAQUS, reliable 3D models of 5 to 15 storeys midrise concrete frame structures rested on raft foundation were built. The effects of the structure’s number of storeys, raft size and thickness were explored for different column sizes. Fixed-based structures which capture the model adopted in seismic codes and flexible-based structures were hit at the bottom by El-Centro (1940) and Northridge (1994) earthquakes. Results and Conclusion: The results, presented in terms of storey lateral deflection, inter-storey drift, shear force, foundation rocking and response spectrum showed the important contribution of SSI effects on the behaviour of the midrise structures. The model analyses indicated that column size strongly affects the behaviour of flexible structures. Let N be the structure number of storeys and C the column size. The results showed that in terms of storey lateral deflection and levelling shear force, for column sizes C 0.5 X 0.5 m, SSI was detrimental to structures with 10 ≤ N ≤ 15 and beneficial to structures with 5 ≤ N <10. Increasing the column size to C 0.5 X 1 m showed that SSI became detrimental for structures with 10 < N ≤ 15 under El-Centro (1940) and for structures with 7≤ N ≤ 15 under Northridge (1994), and beneficial for structures with 5 ≤ N ≤ 10 under El-Centro (1940) and for structures with 5 ≤ N < 7 under Northridge (1994). The FE results showed that even though base shear increased with raft size, lateral deflections were amplified for C 0.5 X 0.5 m S15 structures and attenuated for C 0.5 X 1 m S15 structures. However, the seismic response of S15 structures was slightly affected by the variation in raft thickness under both column sizes. Finally, the paper includes a discussion and evaluation of the contribution of inertial and kinematic effects, including soil types used on the simulated numerical models’ seismic responses.

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Component-level Performance-based Seismic Assessment and Design Approach for Concrete Moment Frames

Cited by 4 publications

References 6 publications

Evaluation of the Seismic Response of an Innovative Hybrid Steel‐Timber Structure

Evaluation of the Seismic Response of an Innovative Hybrid Steel‐Timber Structure

Investigation of Deformation-Based Damage Limits of RC Columns for Different Seismic Codes

Assessing the Dynamic Behaviour of Midrise Frame Structures Sitting on Silty Sandy Soil

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