Seismic performance of frame structures coupled with an external rocking wall

Egidio, Angelo Di; Pagliaro, Stefano; Fabrizio, Cristiano; Leo, Andrea M. de

doi:10.1016/j.engstruct.2020.111207

Cited by 17 publications

(13 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moroder, Sarti, Palermo, and Pampanin (2014) and Watkins, Sritharan, and Henry (2014) studied wall to floor connection using experimental approaches. Egidio, Pagliaro, Fabrizio, and Leo (2020) studied the seismic behavior of frame structure coupled with rocking wall. In this study, our main concern is not the interaction between wall to surrounding members.…”

Section: Finite Element Modelmentioning

confidence: 99%

Numerical investigation of the lateral load behavior of core and coupled rocking walls

Sari¹,

Sorosh²

2022

rdlc

View full text Add to dashboard Cite

During last few decades, the researchers have developed new structural systems which have no or minor damage after being hit by severe events like earthquake. Development of self-centering wall having alternative energy dissipation mechanisms was one of these achievements. A wide variety of rocking wall systems, such as jointed walls, hybrid walls, precast walls with end columns (PreWEC), and PreWEC core wall systems, are proposed and studied. This paper describes an analytical investigation of the lateral load behavior of two new types of hybrid rocking wall systems. Core rocking wall is achieved by merging four single hybrid rocking walls and coupled rocking wall is accomplished by coupling two rocking walls using embedded reinforced concrete beams. The concept of coupling hybrid rocking walls using embedded reinforced coupling beam is emerged from previous coupled conventional shear walls studies. As single rocking wall system, in coupled and core rocking wall, post-tensioning tendons are used as a mean to provide self-centering force, and mild steel bars are used to dissipate energy. The nonlinear behavior of the wall is due to the gap opening at the base joint. Three-dimensional finite element model of each system was developed. The stress distribution, crack propagation, and critical sections of these systems are investigated. The effect of spalling concrete cover in the toe region due to rocking action is explained. In addition, the reduction in stiffness and lateral load resisting capacity of the systems due to cracks is monitored. Finally, the lateral load behavior of single rocking walls is compared to that of core and coupled rocking wall systems.

show abstract

Section: Finite Element Modelmentioning

confidence: 99%

Numerical investigation of the lateral load behavior of core and coupled rocking walls

Sari¹,

Sorosh²

2022

rdlc

View full text Add to dashboard Cite

show abstract

“…Prior research efforts neglect the fact that the RW can be designed as a tuned mass substructure. Di Egidio et al [15] proposed a rigid rocking block that functioned as the TMD. When coupled with the frame structure, this control device was found to possess the merit of reducing both the displacement of the first floor and the drift of the top floor.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures

et al. 2021

View full text Add to dashboard Cite

A tuned mass rocking wall (TMRW) is a passive control device that combines the merits of a traditional tuned mass damper (TMD) and a traditional rocking wall (RW). TMRWs not only help avoid weak story failure of the host structure but can also be regarded as a largely tuned mass substructure in the building structure. Through the appropriate design of the frequency ratio, the host structure can dissipate much more energy under earthquake excitations. In this paper, the basic equations of motion for the mechanical model of an SDOF structure-rigid rocking wall are established, and the optimization formulas of frequency ratio and damping ratio of TMRW are derived. Through the dynamic elastoplastic analysis of a six-story TMRW-frame model, the applicability of the derived parameter optimization formulas and the effectiveness of the TMRW in seismic performance control are investigated. The results demonstrate that the TMRW can coordinate the uneven displacement angle between stories of the host structure. Additionally, the TMRW is found to possess the merit of reducing both the peak and root-mean-square (RMS) structural responses when subjected to different types of earthquake excitations.

show abstract

“…A PNTTMD system was proposed by Xiang and Nishitani [12], in which the rocking wall was designed as a long and narrow pendulum component performed as a TMD. Di Egidio et al [13] proposed a rigid rocking block that worked as a TMD. When connected to the lowest part of the frame structure, this new control device can significantly reduce the drift of the top floor and lateral displacement of the bottom.…”

Section: Introductionmentioning

confidence: 99%

Structural Vibration Control with the Implementation of a Tuned Mass Rocking Wall System

et al. 2021

View full text Add to dashboard Cite

A tuned mass rocking wall (TMRW)-frame structure system is proposed to improve the energy dissipation ability of the traditional rocking wall-frame system. Based on the energy dissipation principle of the traditional tuned mass damper (TMD), a TMRW is designed with proper mass and stiffness according to the dynamic characteristic of the host structure. Firstly, considering the presence of inherent structural damping, the dynamic amplification factor of the main mass was derived from the dynamic equations of the TMRW mechanism. A practical design table was then obtained after parameter study. Secondly, by taking a six-story frame structure as an example, the dynamic time-history analysis was conducted to study TMRW’s seismic performance. The inter-story drift ratios of the TMRW-frame, the traditional rocking wall-frame, and the frame structures were compared, and the seismic responses of the controlled and uncontrolled structures were also compared. The results demonstrate that the TMRW can effectively reduce the inter-story displacement of the host structure, and the lateral deformation mode of the host structure tends to be more uniform. However, compared with the traditional rocking wall-frame system, the proposed TMRW has less ability on coordinating deformation.

show abstract

Seismic performance of frame structures coupled with an external rocking wall

Cited by 17 publications

References 44 publications

Numerical investigation of the lateral load behavior of core and coupled rocking walls

Numerical investigation of the lateral load behavior of core and coupled rocking walls

Seismic Performance Analysis of Tuned Mass Rocking Wall (TMRW)-Frame Building Structures

Structural Vibration Control with the Implementation of a Tuned Mass Rocking Wall System

Contact Info

Product

Resources

About