Mitigation of Pounding Effects

Jankowski, Robert; Mahmoud, Sayed

doi:10.1007/978-3-319-16324-6_5

Cited by 5 publications

(2 citation statements)

References 58 publications

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“…Thorough studies have been performed to improve safety precautions to avoid pounding risk. Such precautions evaluated and developed an adequate separation distance between possible pounding structures to prevent contact during potential extensive lateralload occurrences [46][47][48][49][50][51][52][53]. Additionally, when designing and planning for newly constructed structures, pounding risk can be assessed for existing structures to avoid the occurrence of structural pounding.…”

Section: Introductionmentioning

confidence: 99%

Formulation of Separation Distance to Mitigate Wind-Induced Pounding of Tall Buildings

Brown,

Alanani,

Elshaer

et al. 2024

Buildings

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Structures in proximity subjected to a substantial lateral load (e.g., wind and earthquakes) can lead to a significant hazard known as structural pounding. If not properly mitigated, such impacts can lead to local and global damage (i.e., structural failure). Mitigation approaches can include providing a suitable separation gap distance between structures, installing adequate shock absorbers, or designing the structure for the additional pounding impact loads. Wind-induced pounding of structures can be of higher risk to buildings due to large deflections developed during wind events. The current study develops various mathematical formulas to determine the suitable separation distance between structures in proximity to avoid pounding. The developed procedure relies first on wind-load evaluations using Large Eddy Simulation (LES) models. Then, the extracted wind loads from the LES are applied to finite element method models to determine the building deflections. Various building heights, wind velocities, and flexibility levels are examined to prepare a training database for developing the mathematical formulas. A genetic algorithm is utilised to correlate the required separation gap distance to the varying parameters of the tall buildings. It was found that more complex formulas can achieve better mapping to the training database.

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Section: Introductionmentioning

confidence: 99%

Formulation of Separation Distance to Mitigate Wind-Induced Pounding of Tall Buildings

Brown,

Alanani,

Elshaer

et al. 2024

Buildings

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“…A comparison between these methods concluded that SRSS can be practical and provide the required separation distance [11][12]. The need of providing mitigation methods between buildings that do not have enough gap were discussed in [13] by providing a numerical study with different ground motion records to simulate the pounding between light-mass and heavy-mass three-story buildings. The research objective was to measure the efficiency of the available mitigation methods in reducing the required seismic gaps based on time historyanalysis with nonlinear viscoelastic model.…”

Section: Introductionmentioning

confidence: 99%

Tying Devices to Mitigate Pounding of Adjacent Building Blocks

Masmoum

Alama

2020

Eng. Technol. Appl. Sci. Res.

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Adjacent building blocks separated by thermal expansion joints are vulnerable to pounding during earthquakes. The specified Saudi building code minimum separation may be very large and does not necessarily eliminate pounding forces. This research discusses the feasibility of tying the adjacent building blocks with simple devices to mitigate structural pounding when separated by thermal joints. Six and twelve-story moment resistance frames of intermediate ductility were designed for seismic loads of moderate risk. The seismic response was studied for frames with variable separation distances in three cases related to thermal joint, code minimum separation, required separation to eliminate pounding force, and in a fourth case in which the tying device was used along with thermal separation. A linear elastic model was used to model the assigned gap links between the adjacent building blocks. The tying device was modeled with a tension-only hook element. Four normalized earthquake records were used with inelastic-time history analysis to assess the seismic response of the adjacent building blocks. The proposed tying devices reduced successfully the pounding forces by 40% to 60% for adjacent building blocks with installed thermal separations. Building damage as observed from damage index and the hysteretic response was not influenced by the pounding force, indicating that the tying may be used on existing buildings with thermal separation as a partial mitigation technique to reduce the pounding hazard in such cases. Further improvement on the tying device will increase the mitigation of the pounding hazard.

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