Seismic behavior, blast response and progressive collapse of RC structures equipped with viscoelastic dampers

Shahriari, Alireza; Birzhandi, Mohammad S.; Zafarani, Mohammad M.

doi:10.1016/j.soildyn.2021.106643

Cited by 15 publications

(4 citation statements)

References 42 publications

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“…While there are relatively many experimental and numerical investigations of reinforced concrete (RC) slabs subjected to blast loading [28][29][30][31][32][33][34][35][36][37], there are few studies of slab-column connections. Shahriari et al (2021) numerically investigated the blast response and progressive collapse of RC structures equipped with viscoelastic dampers [38]. They found that viscoelastic dampers designed for seismic loads resulted in a suitable performance for reducing the response of structures to blast loads [38].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Shahriari et al (2021) numerically investigated the blast response and progressive collapse of RC structures equipped with viscoelastic dampers [38]. They found that viscoelastic dampers designed for seismic loads resulted in a suitable performance for reducing the response of structures to blast loads [38]. Krauthammer (1999) reported that plastic hinge control through diagonal reinforcing bars can contribute to the improvement of the blast resistance performance of the connections [39].…”

Section: Literature Reviewmentioning

confidence: 99%

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Numerical Simulation on Dynamic Behavior of Slab–Column Connections Subjected to Blast Loads

2021

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Although many studies on the blast-resistant performance of structures have focused mainly on single members such as beams and columns, there is little research on the behavior of joints that are subjected to blast loads. In this study, the structural behavior of a slab–column connection subjected to blast load was investigated using a numerical analysis method. LS-DYNA was used as a finite element analysis program, and in order to improve the accuracy of numerical analysis, mesh size, material model, and simulation method of blast load were determined through preliminary analysis. The effect of different restraints of the joints, depending on the position of the columns in the slab, on the blast resistance performance was investigated. As a result, the highly confined slab-interior column connection showed better behavior than other edge and corner columns. The drop panel installed between the lower column and the slab was effective in improving the blast-resistance performance of the slab–column connection. For a more accurate evaluation of blast resistance performance, it was suggested that various evaluation factors such as ductility ratio, reinforcing stress, and concrete fracture area can be considered along with the support rotation, which is an important evaluation factor suggested by many standards.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Numerical Simulation on Dynamic Behavior of Slab–Column Connections Subjected to Blast Loads

2021

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“…Nonetheless, the use of super high strength reinforcement always inevitably resulted in poor energy dissipation of the structure because these bars cannot yield or fail to reach their higher yield strain even under large deformation. To improve the energy dissipation capacity of the structure and/or reduce the response induced by external force simultaneously, a significant amount of energy dissipators, mainly including metallic damper [12,20,21], friction damper [22][23][24], viscous damper [25,26], viscoelastic damper [27,28] as well as tuned dampers [29,30], were designed and incorporated to the earthquake-resilient structures. While experimental results had proved that the application of these energy dissipators achieved remarkable effectivity in terms of energy dissipation and structural vibration reduction, there are also some limitations that need to be addressed, such as the unrecoverable plastic deformation for the metallic damper, the almost negligible damping force for viscous damper under small structural velocity, and the block effect of initial stiffness of friction damper on structural deformation recovery, which means that the self-centering capacity or the energy dissipation capacity will be impaired.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on seismic behavior of concrete walls with external magnetorheological dampers

Zhao

Luo

Zhang

et al. 2023

Smart Mater. Struct.

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A reinforcing method for developing a kind of shear wall with both excellent self-centering capacity and high energy dissipation was presented, in which carbon fiber reinforced polymer (CFRP) bars or steel strands were longitudinally placed to provide a restoring effect, while magnetorheological (MR) dampers were externally coupled with wall panels to provide extra energy dissipation. To verify the feasibility of this method, three slender concrete walls were tested under reversed cyclic lateral loading while subjected to constant axial compression with an axial load ratio of 0.26, of which one was reinforced with CFRP bars, the second one was reinforced with CFRP bars and two external MR dampers, and the third one was reinforced with steel strands and two external MR dampers. The results indicated that the test walls possessed remarkable load-resisting capacities even when the lateral drift was as large as 1.8% as well as a lateral deformation recovery rate of 74%–89% after unloading. Owing to external MR dampers, the initial stiffness and ductility were increased by 28.3% and 29.8%, respectively. In addition, a specific quantitative analysis showed that the dampers could increase the cumulative energy dissipation of shear walls by 16.6%, of which the contribution provided by MR damper was 64.8%, confirming the effectiveness of MR dampers in improving energy dissipation while preserving the self-centering capacity.

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“…To decrease the force and deformation characteristics of shear wall structures with coupling beams, researchers generally adopted energy dissipation methods, that is, the installation of shear dampers at the inflection point in the middle span of the coupling beams, such that the deformation and seismic energy dissipation mainly occur in the dampers, thus alleviating the plastic damage of the coupling wall-columns and main structures. Over the years, researchers have examined various coupling beam dampers with different energy dissipation principles, such as friction dampers, [3][4][5][6][7][8][9] viscoelastic dampers, [10][11][12] and metal dampers. [13][14][15] Composite dampers with multiple energy dissipation principles have also been proposed and developed, for example, metal and viscoelastic composite dampers, [16][17][18] steel tube and lead core composite dampers, [19][20][21][22] lead and rubber composite dampers, [23][24][25] etc.…”

Section: Introductionmentioning

confidence: 99%

Development and investigation of an innovative shape memory alloy cable‐controlled self‐centering viscoelastic coupling beam damper for seismic mitigation in coupled shear wall structures

Qian

Fan

Shi

et al. 2022

Earthq Engng Struct Dyn

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To improve the seismic performance of coupled shear walls in high‐rise buildings and to eliminate the problems of large residual deformation and relatively small initial stiffness and damping properties of the traditional viscoelastic coupling beam damper (TVCBD), an innovative shape memory alloy (SMA)‐cable‐controlled self‐centering viscoelastic coupling beam damper (SVCBD) with energy dissipation and self‐centering capabilities was designed and investigated in this study. The construction form and operating principles of the SVCBD were proposed, relevant material performance tests of the cables were performed, and good results were obtained. Finally, the contribution of the SVCBD to seismic mitigation of a 10‐story reinforced concrete coupled shear wall structure was verified by seismic time‐history analyses. The results indicated that compared with TVCBD, SVCBD possesses fuller hysteretic curves, showing stronger energy dissipation capacity, higher initial stiffness, and much smaller residual deformation. The initial strain and cross‐sectional area of the SMA cables and the shear area of the viscoelastic plates affect the energy dissipation and self‐centering performance of SVCBD significantly. The seismic response and post‐earthquake residual deformation of the coupled shear wall structure and the plastic damage of the main components can be effectively controlled by utilizing the proposed SVCBD.

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Seismic behavior, blast response and progressive collapse of RC structures equipped with viscoelastic dampers

Cited by 15 publications

References 42 publications

Numerical Simulation on Dynamic Behavior of Slab–Column Connections Subjected to Blast Loads

Numerical Simulation on Dynamic Behavior of Slab–Column Connections Subjected to Blast Loads

Experimental study on seismic behavior of concrete walls with external magnetorheological dampers

Development and investigation of an innovative shape memory alloy cable‐controlled self‐centering viscoelastic coupling beam damper for seismic mitigation in coupled shear wall structures

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