Development and seismic performance of precast rocking walls with multiple steel energy dissipaters

Guan, Dongzhi; Peng, Z.; Lin, Yu; Liu, Jiabin; Li, Zhang

doi:10.1016/j.cscm.2023.e02304

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…Serious damage to the structural components and larger residual displacement of entire structures have caused huge economic losses [5][6][7]. Therefore, different types of structures have been developed to increase their seismic performance and decrease the economic losses caused by earthquakes [8][9][10][11][12]. Selfcentering prestressed concrete (SCPC) frames, proposed by the PRESSS program, have been developed as a novel seismic-resistant system to enhance the resilience of structures due to minor residual drift under earthquakes [13].…”

Section: Introductionmentioning

confidence: 99%

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Huang,

Qian,

Meng

et al. 2023

Buildings

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To enhance the structural stiffness and energy-dissipating capacity after the decompression of beam-to-column connections for self-centering prestressed concrete (SCPC) frames, this study presents the seismic performance of a new type of SCPC frame with variable friction dampers (VFDs). The structure is characterized by a third stiffness and a variable energy-dissipating capacity. A 5-story and an 8-story VFD-SCPC frame were selected as the analytical cases, and their numerical models were built based on OpenSees 3.3.0 finite-element software. Sixteen ground-motion records were selected as excitations for the analyses, and the influence of the second stiffness and the third stiffness for the VFD-SCPC connections, as well as the second activation for VFD, on the seismic performance of the structures, was studied. The results showed that increasing the stiffness (number) of prestressed strands and their distance to the center of the beam section can obviously increase the second stiffness of the structures, thus decreasing their displacement, while the distribution mode of inter-story drift along the building’s height cannot be changed. Increasing the third stiffness of the connections (the angle of slope sliding parts and the stiffness for the combination of disc springs) can effectively reduce the deformation of the structures under MCE (maximum-considered earthquakes) seismic levels and improve the energy-dissipation capacity of structures significantly. The premature secondary activation of VFD can enhance the loading capacity and energy-dissipation capacity of structures under both DBE (design-basis earthquakes) and MCE seismic levels, and reduce the inter-story drift of structures effectively.

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Section: Introductionmentioning

confidence: 99%

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Huang,

Qian,

Meng

et al. 2023

Buildings

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“…Compared with the flexural-type metal dampers, the shear-type metal dampers have higher stiffness and bearing capacity due to in-plane deformation behavior. To effectively make full use of the steel materials, the yield energy dissipation segment of steel plates is often induced directionally by means of a weakening section, resulting in the development of an X-shaped metal damper [25][26][27][28][29][30][31]. X-shaped metal dampers were used in combination with the stiffening ribs to restrict the out-of-plane deformation of steel plates, such as the channel-like section steel in precast steel-concrete frame structures [27,28], shape-optimized composite metallic yielding dampers in framebracing structures [29], steel panel dampers in precast rocking wall structures [30], etc.…”

Section: Introductionmentioning

confidence: 99%

Development and Investigation of the Hysteretic Behavior of an X-Shaped Metal Damper with an Oblique Angle

Zhu,

Dang,

Liang

et al. 2023

Applied Sciences

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To investigate the hysteretic behavior of an X-shaped metal damper (XMD) with an oblique angle, cyclic loading tests were carried out on nine specimens, including two XMDs without buckling-restrained devices, four XMDs with stiffening ribs, and three XMDs with cover plates as references. The test results showed that the oblique angle could effectively increase the stiffness, strength, and energy dissipation of the XMD. When the oblique angle of an XMD with stiffening ribs increased from 0° to 30° at the applied displacement of 8.4 mm, the mean strengths and cumulative energy dissipation of specimens increased by about 80.77% and 80.57%, respectively. Although asymmetric hysteretic loops were also observed in specimens with an oblique angle and buckling-restrained devices, stable hysteretic curves were obtained. This indicated that the stiffening ribs and cover plates can effectively constrain the buckling behavior of XMDs. Additionally, the mean strengths of specimens with stiffening ribs were a little higher than those of specimens with cover plates. Subsequently, the finite element analysis models of the XMDs were proposed, in which the metal plasticity model considering isotropic and kinematical hardening was used to model the material properties of steel, and the simulation results matched well with the test results. Finally, the theoretical calculation method was proposed to predict the elastic stiffness of specimens, and the theoretical elastic stiffness matched well with the test results.

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Development and seismic performance of precast rocking walls with multiple steel energy dissipaters

Cited by 2 publications

References 23 publications

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Development and Investigation of the Hysteretic Behavior of an X-Shaped Metal Damper with an Oblique Angle

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