Retrofitting of pinned beam–column connections in RC precast frames using lead extrusion dampers

Soydan, Cihan; Yüksel, Ercan; İrtem, Erdal

doi:10.1007/s10518-017-0246-z

Cited by 22 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, T-LED was installed diagonally to the beam-to-column connection of a precast RC frame, [18]. The bare specimen and the specimen equipped with T-LED were exposed to real ground motion records on the shake table, Figure 4.…”

Section: Performed Experiments On T-ledsmentioning

confidence: 99%

“…Figure 4 Precast RC beam-column connection shake table tests, [18] The experimental study resulted that relative top displacement, deformations at the column base, and rotation of the connection joint were reduced up to 50%, 65%, and 30%, respectively by adding T-LED to the precast RC frame.…”

Section: Performed Experiments On T-ledsmentioning

confidence: 99%

“…Hence, it was also utilized in some base isolation systems [10][11][12]. Lead extrusion damper (LED) which is a passive EDD also benefits from the metallurgical properties of lead [13][14][15][16][17][18][19]. LED dissipates the energy by extrusion of lead through a hole or an orifice.…”

Section: Introductionmentioning

confidence: 99%

“…The rationale of the study is the development of a three-dimensional detailed finite element model of LEDs that were tested (T-LED), [13][14][15][16][17][18][19], and studied in the literature (L-LED), [21][22]. To this extent, numerically obtained force-displacement hysteresis of T-LED and the maximum force of L-LED were compared with the related experimental results.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of Finite Element Model for a Special Lead Extrusion Damper

Güllü

Çalım

Soydan

et al. 2021

Sakarya University Journal of Science

Self Cite

View full text Add to dashboard Cite

A significant amount of seismic energy is imparted to the structures during earthquakes. The energy spreads within the structure and transforms in various energy forms as dissipated through the structure. The conventional seismic design provides specific ductile regions, namely plastic hinges, on structural elements. Therefore, the energy dissipation capacities of the structural elements and the structure enhance. However, this approach accepts that the deformations will concentrate on the plastic hinge zones and severe damage may occur on structural elements within deformation limits that are defined by the seismic codes. The modern seismic design aims to dissipate a large portion of the seismic input energy by installing energy dissipating devices (EDDs) to the structure. Thus, deformation concentrates on EDDs which can be replaced after an earthquake, and energy demand for structural elements is decreased. Lead extrusion damper (LED) is a passive EDD that utilizes the hysteretic behavior of lead. In this paper, the preliminary results of the developed three-dimensional finite element model (FEM) for a LED is presented. The results obtained from the finite element analysis (FEA) were compared with the experimental ones in which LEDs were exposed to sinusoidal displacements. Also, the applicability of the developed FEM was checked for different component dimensions given in the literature. The comparison study yielded a satisfactory consistency. Additionally, the maximum relative difference obtained for the literature devices was reduced to 12% from 39% by the developed FEM.

show abstract

Section: Performed Experiments On T-ledsmentioning

confidence: 99%

Section: Performed Experiments On T-ledsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of Finite Element Model for a Special Lead Extrusion Damper

Güllü

Çalım

Soydan

et al. 2021

Sakarya University Journal of Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Koetaka et al 28 presented a novel beam‐column connection with the hysteretic dampers, and the tests revealed that yielding was limited only in the damper and the system was capable of achieving stable hysteresis behavior in a large deformation range. Soydan et al 29 investigated a novel retrofitting application which was based on the insertion of a lead extrusion damper in the beam‐column connection of precast RC frames. Tan and Ko 30 designed a type of beam‐column connection incorporated with the viscoelastic dampers and experimentally proved its effectiveness in vibration control.…”

Section: Introductionmentioning

confidence: 99%

Study on the performance of a gear‐driven rotation‐amplified rubber viscoelastic damper and its vibration control of a frame structure

Huang

2020

Struct Control Health Monit

View full text Add to dashboard Cite

This paper presents an innovative gear-driven rotation-amplified rubber viscoelastic damper (GRRVD) to reduce the seismic shift responses of beam-column connections in frame structures. Based on the principle of gear transmission, the damper can amplify the rotational deformation of the beam-column joints of frame structures according to actual engineering needs and give full play to the energy dissipation capacity of rubber viscoelastic materials. First, the design philosophy, basic construction, working mechanism, and outstanding features of this damper are introduced. Then, cyclic loading test is carried out to study the influence of rotational deformation and loading frequency on the mechanical properties of the fabricated GRRVD. Additionally, a mechanical model which can precisely simulate the hysteretic characteristics of the damper is derived and then verified by numerical simulation. Finally, a nonlinear time history analysis is performed on a six-story steel frame for three cases: no dampers, dampers without deformation amplification, and dampers with deformation amplified by a factor of 2.5. The results show that the control effect of the damper can be improved by two to four times by amplifying the rotational deformation response at the beam-column joint by 2.5 times. K E Y W O R D S beam-column joints, passive control, rotational deformation-amplified damper, seismic response analysis, theoretical model 1 | INTRODUCTION Earthquake hazards and wind disasters have been causing enormous losses to human life and society. 1-5 Protection for civil engineering structures from the damage due to earthquake or strong wind is a critical issue. Various measures have been developed and implemented to reduce excessive structural dynamic responses, such as active, passive, hybrid, and semi-active control methods. 6,7 Passive control system is to dissipate seismic energy through the energydissipating devices attached to the structures. 8 Due to its simple construction, low cost, convenient maintenance, and no external energy requirement, the devices (or dampers) have been widely used to mitigate the dynamic response of building structures. 9-14 However, the seismic damage of frame structures is mostly concentrated in the area of beam-column joints, and the performance of joints has a significant effect on the overall safety and stability of the whole structure. 15-17 When the

show abstract