Soft-Story Effects on the Behavior of Fixed-Base and LRB Base-Isolated Reinforced Concrete Buildings

Komur, M. Aydin

doi:10.1007/s13369-015-1664-3

Cited by 16 publications

(8 citation statements)

References 29 publications

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“…Hu [15] made the comparison between base shears and interstory drifts for steel frames bearing lead-rubber bearing (LRB) isolation systems and for this purpose he used nonlinear time history analyses with NF ground motions. Komur [19] investigated the soft-story behavior in RC structures with conventional base and lead core rubber bearing systems under the various seismic loads. Following that, period of the frame system, story acceleration, interstory drift ration, base shear forces, and distribution of plastic hinges and their damage condition have been assessed.…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Estimates of LRB Base Isolated Frames Using Performance-Based Design

Mansouri

Amiri

et al. 2017

Shock and Vibration

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With improving technology, the idea of using energy dissipater equipment has been strengthened in order to control the structures response in dynamic loads such as wind and earthquake. In this research, we dealt with seismic performance of base isolated structures with lead-rubber bearing (LRB) using incremental dynamic analysis (IDA). For this purpose, 3- and 9-story buildings have been utilized in the SAC project undergoing 22 earthquake records which were far-fault. Plotting the fragility curve for various states of design time period and isolator damping of LRB, it is observed that, by increasing damping, the isolator has not been activated in small spectrum acceleration, which shows that the annual exceedance probability is increased in immediate occupancy (IO) performance level and decreased in life safety (LS) performance level. The results show the reduction of determined failure probability in fragility curves for two levels of performance of uninterrupted use and lateral safety. Likewise obtained results show that, with increasing design time period of isolator, the amount of failure probability is decreased rather than the isolator with smaller design time period, for both LS and IO states. And the isolator illustrates better performance.

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Section: Introductionmentioning

confidence: 99%

Seismic Fragility Estimates of LRB Base Isolated Frames Using Performance-Based Design

Mansouri

Amiri

et al. 2017

Shock and Vibration

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“…The propagation of plastic hinges in a frame under seismic loading reflects complex non-linear behaviour. Many studies have looked into the hinge propagation of soft-storey [46], [47] and retrofit techniques [48], [49]. However, these studies are mostly for seismically-designed buildings that may not be entirely applicable to the buildings erected in Malaysia.…”

Section: Soft-storey Buildings In Prone Regions Of Seismic Activitiesmentioning

confidence: 99%

A Case Study on Structural Failure of Reinforced Concrete Beam-Column Joint After the First Significant Earthquake Impact in Malaysia

Ganasan

Tan

Ibrahim

et al. 2020

IJIE

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This paper presents a case study regarding failures of structural buildings which occurred in Malaysia after the first significant earthquake event dated on June 5, 2015. Ranau is a locality situated in Sabah, Malaysia on the island of Borneo. The seismic activity was triggered when an earthquake with a magnitude of 5.9 afflicted Ranau, including seven other districts that also felt the tremors. Even though the impact of magnitude was undisputedly not high, the severity level of damages was found to be absolute (irreparable) in the structural RC beam-column joints and soft-storey buildings. Most of the buildings in Malaysia were built without the consideration of seismic design, and thus a major factor in structural failure. The earthquake has directed the seismic demand, while the total displacement was concentrated at the weakest floor that caused more damage to the building. This paper shows the causes of beam-column joint damages and explains the proposed (to-date) strengthening methods. Future studies related to seismic activities are in need to analyse the performance of the existing design of structural RC members and propose seismic design in Malaysia.

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“…In general, lead has a low yield point when its shear stress reaches 10MPa, and it exhibits elastoplastic behavior. Lead is also resistant to repeated loads and can renew itself over time following deformation, Komur [13].…”

Section: Lead Rubber Bearing Isolationmentioning

confidence: 99%

Untitled

2018

CERJ

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In this paper, nonlinear performance of elevated water tank staging has been studied. For this purpose, two different staging pattern are selected for same water capacity of tank and performance are compared. Further nonlinear dynamic behaviour is studied by performing nonlinear time history analysis. The results show unsafe response conditions of structural elements and based on these results two protective system are proposed. Base isolation system (Laminated rubber bearing) and passive energy dissipation devices (Metallic damper) are used to control seismic response of tank staging. The effectiveness of two protective systems to control response of tank staging are discussed.

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Soft-Story Effects on the Behavior of Fixed-Base and LRB Base-Isolated Reinforced Concrete Buildings

Cited by 16 publications

References 29 publications

Seismic Fragility Estimates of LRB Base Isolated Frames Using Performance-Based Design

Seismic Fragility Estimates of LRB Base Isolated Frames Using Performance-Based Design

A Case Study on Structural Failure of Reinforced Concrete Beam-Column Joint After the First Significant Earthquake Impact in Malaysia

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