Seismic design methodology for self-centering reinforced concrete frames

Li, Xilin; Jiang, Cong; Yang, Boya; Quan, Liumeng

doi:10.1016/j.soildyn.2018.07.002

Cited by 21 publications

(3 citation statements)

References 11 publications

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“…In addition, despite the lower energy dissipation capacity of self-centering systems, dynamic analyses of generalized SDOF (Christopoulos et al, 2002a, 2003; Seo and Sause, 2005) and MDOF (Pampanin et al, 2003; Tremblay et al, 2008a) structures confirmed the potential of using self-centering systems to match or even improve the seismic performance of structures compared with that of using conventional systems. These generalized studies were later expanded to analyses on more specific types of self-centering systems with more advanced and sophisticated numerical models, which have defined more detailed design procedures for systems including post-tensioned beam–column connections (Chou and Chen, 2011b; Kim and Christopoulos, 2009; Qiu and Zhu, 2017; among others), self-centering axial devices (Chou et al, 2016; Kitayama and Constantinou, 2016b; Qiu and Zhu 2017), self-centering base isolators (De Domenico et al, 2020; Pang et al, 2021), as well as systems that rely on controlled rocking of entire steel-braced frames (Eatherton et al, 2014b; Wiebe and Christopoulos, 2015b, 2015c), concrete frames (Lu et al, 2019), and timber frames (Iqbal et al, 2015; Shu et al, 2019).…”

Section: General Considerations For the Seismic Design Of Self-center...mentioning

confidence: 99%

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Zhong

Christopoulos

2021

Earthquake Spectra

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This state-of-the-art review provides an overview of the evolution of self-centering structures from early historical structures that inherently exhibited a recentering response to modern systems engineered for enhanced seismic resilience. From the early research investigations that were conducted since the 1960s, to the sharp increase of interest in this topic over the last two decades, self-centering seismic-resistant structures that can mitigate both damage and residual drifts following major earthquakes have seen significant advances. These systems achieve the intended self-centering response by either allowing for the rocking of primary structural elements in a controlled manner, commonly coupled with mechanical restraints and energy dissipation devices, or by including self-centering devices as main structural or supplemental structural members. To better explain the concepts and the underlying mechanics governing their seismic response, detailed schematic illustrations were developed in this article, highlighting the fundamentals behind each of these systems. This article covers a historical overview, presents the state of the research and of the art, discusses general design challenges and practical considerations, and concludes with future research needs to advance the development and broader application of self-centering systems in real structures.

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Section: General Considerations For the Seismic Design Of Self-center...mentioning

confidence: 99%

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Zhong

Christopoulos

2021

Earthquake Spectra

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“…[ 45 ] A series of rigid elements are used to simulate the beam‐to‐column and beam‐to‐corbel contact interfaces, respectively, shown in Figure 14. The contact and gap opening behavior at the beam‐to‐column interface is simulated with a ZeroLength section element employing the uniaxial elastic‐no tension (ENT) Material l. [ 46 ] The ENT Material should be assigned with a relatively large elastic modulus in compression (i.e., 1 × 10 9 MPa is used in this paper) to simulate the steel‐to‐steel contact. Moreover, to simulate the shear resistance of the SC, no relative vertical movement between the beam centerline and column is allowed.…”

Section: Numerical Simulation and Parametric Analysismentioning

confidence: 99%

Experimental and numerical study of unbonded post‐tensioned precast concrete connections with controllable post‐decompression stiffness

Huang

Zhou

Clayton

2021

Structural Design Tall Build

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Summary A new unbonded post‐tensioned precast concrete (PTPC) frame with controllable post‐decompression stiffness (CPDS), achieved by employing novel variable friction energy dissipaters (VFEDs), is proposed in this paper. A steel corbel (SC) is used in the CPDS‐PTPC connection to enhance the shear capacity. The VFED incorporates grooved steel plates and a combination of Bellville washers to provide variable energy dissipation and load‐resisting capacity to achieve target structural performance at different seismic intensity levels. A series of cyclic tests of a full‐scale beam‐to‐column specimen were carried out with different design parameters to investigate the hysteretic behavior of the proposed CPDS‐PTPC connection. The specimen was subjected to cyclic loading up to 9.0% drift to observe different levels of structural damage. Finally, a numerical model is proposed and validated with experimental data, and parametric analyses were performed by varying geometric properties of the VFEDs in the model. Both experimental and numerical analyses confirm the unique capabilities of the proposed CPDS‐PTPC connections to achieve tunable seismic behavior, especially in controlling post‐decompression stiffness while also providing desirable ductile damage at very large seismic demands. The post‐decompression stiffness and load‐carrying capacity are mainly controlled by the stiffness of post‐tensioned (PT) elements and configuration of VFEDs.

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“…Porco et al (2013) proposed a preliminary design procedure for hybrid joints based on a 4-way abacus to determine tensile force of unbonded tendons and steel ratios. Lu et al (2019) presented a two-phase design approach to achieve displacement targets for self-centering reinforced concrete frames. These are useful attempts in terms of seismic design method for HUPT-PC structures.…”

Section: Introductionmentioning

confidence: 99%

Seismic design of hybrid unbonded post-tensioned precast concrete joints based on bearing capacity and energy dissipation capacity

Song

et al. 2020

Advances in Structural Engineering

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This paper provides a practical design method for hybrid unbonded post-tensioned precast concrete joints. Such joints featured with self-centering capacities have been widely favored in recent years. However, the absence of design methods hinders their further promotion. To solve the issue, two methods for calculating mechanical behavior of the joints were first studied: characteristic points method and iterative method. The effectiveness of the methods was verified by the existing test results. On this basis, a joint design method considering both yield bearing capacity and energy dissipation capacity was proposed. Moreover, to facilitate design, some factors affecting the bearing capacity were discussed. A five-story frame structure was designed by the proposed design method, and the influence of two design factors on structural response was analyzed by utilizing nonlinear time-history method. The analysis results show that: with the increase of energy dissipation factor αs, the post-earthquake residual deformation of the structure tends to increase linearly, while the accumulated damage of the structure will decrease continuously; both overdesign and underdesign of bearing capacity of the joint are unfavorable; and near-field earthquake may cause irreparable damage to structural columns, making the residual deformation of structures contrary to the self-centering capacity of joints, which shall be considered during engineering design.

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Seismic design methodology for self-centering reinforced concrete frames

Cited by 21 publications

References 11 publications

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Experimental and numerical study of unbonded post‐tensioned precast concrete connections with controllable post‐decompression stiffness

Seismic design of hybrid unbonded post-tensioned precast concrete joints based on bearing capacity and energy dissipation capacity

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