Façade scaffolding behaviour under wind action

Lipecki, Tomasz; Jamińska-Gadomska, Paulina; Bęc, Jarosław; Błazik‐Borowa, Ewa

doi:10.1007/s43452-020-00034-0

Cited by 18 publications

(6 citation statements)

References 27 publications

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“…The first graph shows the auto power spectrum of accelerations for horizontal vibrations along the scaffolding façade, while the second one represents vibrations perpendicular to the façade. Low natural frequencies make scaffolding susceptible to wind-induced vibrations [7,8] and vibrations generated by the movement of users on the scaffolding [2]. The movement of the structure is perceptible to users when walking on the scaffolding.…”

Section: Vibration Sources Acting On Scaffoldingmentioning

confidence: 99%

Analysis of scaffolding harmonic excitation

Bęc,

Błazik-Borowa,

Szer

2023

Bulletin of the Polish Academy of Sciences Technical Sciences

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Scaffolding is equipment usually used at construction sites. A scaffolding structure is lightweight and made of elements used many times. The characteristics of scaffolding make it susceptible to dynamic actions present at the structure or occurring nearby. A scaffolding structure of medium size was subjected to analysis in this paper. The structure FEM model was loaded with single force harmonic excitation with various frequencies ranging from 1 Hz to 12 Hz applied in one of many selected points on the scaffolding façade. In the first step, natural frequencies and mode shapes of the analyzed structure were calculated. Then the full dynamic analysis was carried out to obtain maximum displacements of selected control points. The relation of excitation force frequency and location to the amplitudes of generated displacement was observed. It was found that low excitation frequencies close to the natural frequencies of the structure produced vibrations ranging to large areas of the scaffolding surface. Higher excitation frequencies are usually less propagated at the scaffolding but still may produce some discomfort to the structure users in the vicinity of the excitation force location. Scaffolding is equipment usually used at construction sites. A scaffolding structure is lightweight and made of elements used many times. The characteristics of scaffolding make it susceptible to dynamic actions present at the structure or occurring nearby. A scaffolding structure of medium size was subjected to analysis in this paper. The structure FEM model was loaded with single force harmonic excitation with various frequencies ranging from 1 Hz to 12 Hz applied in one of many selected points on the scaffolding façade. In the first step, natural frequencies and mode shapes of the analyzed structure were calculated. Then the full dynamic analysis was carried out to obtain maximum displacements of selected control points. The relation of excitation force frequency and location to the amplitudes of generated displacement was observed. It was found that low excitation frequencies close to the natural frequencies of the structure produced vibrations ranging to large areas of the scaffolding surface. Higher excitation frequencies are usually less propagated at the scaffolding but still may produce some discomfort to the structure users in the vicinity of the excitation force location.

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Section: Vibration Sources Acting On Scaffoldingmentioning

confidence: 99%

Analysis of scaffolding harmonic excitation

Bęc,

Błazik-Borowa,

Szer

2023

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…Besides, some studies have also presented the dynamic characteristics of attached scaffolds under the action of pulsating winds [5] . At the same time, some projects have analyzed the maximum bending moment of scaffolding under wind loads on the bars and summarised the laws of variation of the maximum bending moment, providing data to support the safe design of scaffolding construction in super tall buildings [6] . Therefore, to derive the variability of the force conditions of the scaffold under static and timerange wind loads and to propose the optimum wind vibration coefficient for the scaffold, this study simulated and analyzed the overall scaffold model by SAP2000 finite element software.…”

Section: Introductionmentioning

confidence: 99%

Performance Study of External Scaffolding under Wind-Induced Action

Cao¹,

Huang

Chen³

et al. 2023

J. Phys.: Conf. Ser.

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Scaffolding is an essential temporary measure in engineering construction, and its safety management is critical in the construction process. In this paper, the overall scaffolding model is simulated and analyzed by SAP2000 finite element software. The difference in force between the scaffolding under static wind load and time-range wind load is obtained so that the wind vibration coefficient of the scaffolding is suggested. The results show that the most influential factor in the stability of the scaffold is the way in which the wall elements are arranged. At the same time, the most favorable arrangement is a two-step, two-span arrangement of the wall elements, a 50° angle of scissor bracing, and a wind protection factor of 0.8 for the safety net. Also, the wind vibration factor βz should be taken as 2.5 instead of 1 in the scaffolding code for close-meshed scaffolding at a height of 50 m.

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“…The accident rate in the construction industry depends on many factors of a technical, human, managerial, legislative, environmental and economic nature. The accidentality phenomenon in the construction industry is also influenced by unknown factors that have not yet been investigated [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Prediction model of seasonality in the construction industry based on the accidentality phenomenon

Hoła

Topolski

Szer

et al. 2021

Archiv.Civ.Mech.Eng

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The construction industry is an economic sector that is characterized by seasonality. Seasonal factors affect the volume of production, which in turn affects the accident rate. The aim of the research presented in the article was to develop a model for predicting the number of people injured in occupational accidents in the construction industry. Based on the analysis of statistical data and previous studies, the occurrence of certain regularities of the accidentality phenomenon was found, namely the long-term trend over many years, as well as seasonality and cyclicality over the course of a year. The found regularities were the basis for the assumptions that were made for the construction of the model. A mathematical model was built in the non-linear regression dimension. The model was validated by comparing the results of prediction errors generated by the developed model with the results of prediction errors generated by other known models, such as ARIMA, SARIMA, linear and polynomial models, which take into account the seasonality of the phenomenon. The constructed model enables the number of people injured in accidents in the construction industry in selected months of future years to be predicted with high accuracy. The obtained results can be the basis for making appropriate decisions regarding preventive and prophylactic measures in the construction industry. Commonly known mathematical tools available in the STATISTICA package were used to solve the given task.

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Façade scaffolding behaviour under wind action

Cited by 18 publications

References 27 publications

Analysis of scaffolding harmonic excitation

Analysis of scaffolding harmonic excitation

Performance Study of External Scaffolding under Wind-Induced Action

Prediction model of seasonality in the construction industry based on the accidentality phenomenon

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