Hysteretic behavior and parametric studies of a self-centering RC wall with disc spring devices

Xu, Lihua; Xiao, Shuijing; Li, Zhongxian

doi:10.1016/j.soildyn.2018.09.017

Cited by 44 publications

(10 citation statements)

References 23 publications

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“…Furthermore, replaceable components were introduced in the rocking region to prevent concrete spalling and crushing under high local compressive stresses induced by rocking actions. Examples of replaceable components include steel jackets covering concrete rocking toes (Guo et al, 2014) and disc spring devices replacing concrete rocking toes (Xu et al, 2018a). An overview of the different types of rocking frames and walls for concrete structures is schematically illustrated in Figure 8.…”

Section: Rocking Frames and Walls For Concrete Buildingsmentioning

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: Rocking Frames and Walls For Concrete Buildingsmentioning

confidence: 99%

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

Zhong

Christopoulos

2021

Earthquake Spectra

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“…The restoring force of the SCSW is provided by the SC system, and more seismic energy is dissipated by the ED system. To meet the bearing capacity (which refers to the base shear force and can also reflect the moment capacity of the specimen) and deformation requirements of the SCSW in seismic design, the disc springs are combined both in parallel (which can increase the restoring force of the DS device 26 ) and in series (which can increase the deformation capacity of the DS device 26 ), as shown in Figure 2a. The external load is transmitted to the combination disc springs through the spring plate, and thus, the disc springs are compressed.…”

Section: Design Requirement Of Ds Devices In Scswmentioning

confidence: 99%

“…Additionally, the installation of PT tendons and connectors in self‐centering wall systems is complicated; the restoring force provided by unbonded PT tendons may completely die out during cyclic loading, and self‐centering wall systems using unbonded PT tendons in high‐rise buildings are limited 25 . To both achieve self‐centering capability and prevent the concrete wall toes from damage, a new type of self‐centering shear wall system with disc spring (DS) devices was proposed by Xu et al 26 ; DS devices are installed at the foot of the wall to prevent the concrete from crushing, and the restoring force is provided by combination disc springs instead of unbonded PT tendons. It should be noted that the combination form of the disc springs is the main factor that affects the ultimate restoring force and deformation of the DS device; thus, the ultimate deformation of the DS device can be designed to meet the requirements of the structure in strong earthquakes by adjusting the number of disc springs in series.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental verification of disc spring devices in self‐centering reinforced concrete shear walls

Xiao

2020

Struct Control Health Monit

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Summary This paper develops a disc spring (DS) device to improve the self‐centering capability of a conventional reinforced concrete (RC) shear wall. In particular, the DS devices are installed at the foot of the RC shear wall, thus forming a self‐centering RC shear wall (SCSW) system. The DS devices used in the SCSW system are expected to protect the RC wall from damage and provide restoring force for the system. The design method of the DS device is first presented, and mechanical equations are proposed to predict the loading force–displacement relationship of the DS device. A nonlinear regression method is also introduced to better describe the relationship between the friction force and torque for the DS device with friction materials. One friction device, four DS devices, and three SCSW specimens were finally designed and tested under cyclic loadings to investigate their hysteretic performances. The results demonstrate that the friction material exhibits stable and satisfactory energy dissipation, and all the designed DS devices exhibit good self‐centering capability and stable energy dissipation, which steadily increases with the increase of the friction force. The mechanical behaviors of the designed DS devices during loading stages are also effectively predicted by the proposed mechanical equations. Furthermore, the designed SCSWs with DS devices are demonstrated to exhibit desirable earthquake‐resilient performance.

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“…Guo et al (2014) have created two steel jackets which were fabricated at the wall toes with concrete cast inside so that the concrete spalling and crushing under high local compressive loads are prevented as shown in Figure 12 (a). Xu et al (2018) and Xiao et al (2020) have innovated and applied the two-disc spring devices which exhibit high compression as the replaceable energy dissipation that are symmetrically installed at the two bottom corners of the rocking wall as shown in Figure 12 Apart from the laboratory experiment, numerous computational works on the static and dynamic performance of rocking walls have been conducted mutually. These computational works are based on analytical and numerical studies.…”

Section: Figurementioning

confidence: 99%

“…Configuration of self-centering shear walls installed with (a) steel jacket(Guo et al 2014) and (b) disc spring(Xu et al 2018) at wall toes.…”

mentioning

confidence: 99%

Review on the rocking wall systems as a self-centering mechanism and its interaction with floor diaphragm in precast concrete structures

Masrom

Hamid

2020

Lat. Am. j. solids struct.

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The severe damage of precast concrete wall structures that have been recorded in the past earthquake has led to the innovation of the rocking wall concept which can demonstrate free or minimum damage aftershock of an earthquake. Furthermore, extensive research works have been well conducted in the past three decades on the establishment of precast rocking wall systems, designs, details, and techniques. Despite this extensive development, little attention has been devoted to investigate the interaction between the rocking wall systems and the flooring diaphragm. The historical perspective on the development of rocking wall systems over the past few decades in the precast concrete structures is presented. Subsequently, the limited research works on the interaction of precast rocking wall to the floor diaphragm are described. Apart from that, this paper attempts to highlight the application of rocking wall systems in the context of precast connection for the precast load-bearing structures. In this contribution, the precast rocking wall-floor connection for precast load-bearing structures is proposed and presented in this paper.

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Hysteretic behavior and parametric studies of a self-centering RC wall with disc spring devices

Cited by 44 publications

References 23 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

Design and experimental verification of disc spring devices in self‐centering reinforced concrete shear walls

Review on the rocking wall systems as a self-centering mechanism and its interaction with floor diaphragm in precast concrete structures

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