Methods for the vibration analysis of reinforced concrete precast one-way joist slab floor systems under human walking

Garatachea, Omar Caballero; Juãrez-Luna, Gelacio; Sandoval-Hernández, Manuel Eurípides Ruiz

doi:10.1016/j.jobe.2021.103217

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…They used a laser Doppler vibrometer to measure the effects of jumping and walking on the vibration performance of the beam block precast slab system. In addition to maintaining the test and numerical analysis, Caballero‐Garatachea et al 13 research on the reinforced concrete precast one‐way joist slab system also establishes an effective finite element model of human‐induced vibration on this basis and assesses the comfort of such slabs by contrasting the test results, numerical analysis, and finite element simulation.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on fundamental frequency and human‐induced vibration characteristics of light steel foam concrete composite floor

Xu,

Meng

et al. 2024

Structural Design Tall Build

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SummaryIn order to study the dynamic characteristics and human‐induced vibration response of light steel foamed concrete composite floor (LCSF), the vibration characteristics of 4.2 m × 5 m LCSF model were tested under the condition of opposite side support, and the natural vibration frequency of LCSF was obtained. The orthogonal anisotropic elastic plate and the simulated beam element were used, respectively, to compute the natural vibration frequency of the LCSF, and the estimated findings were compared with those obtained from measurements. The discrepancy between the calculated results and the measured results of the approximate beam element using the natural vibration frequency calculation technique is around 13%, but the error for the plate element using the calculated results and the tested results is about 23%. To examine the floor's vibration response under the factors of step frequency, walking path, pedestrian density, and load distribution, the LCSF underwent a human‐induced vibration test. The test results show that the fundamental frequency of the LCSF specimen is about 11 Hz, which can meet the requirements of the specification. However, the vibration response of the LCSF specimen under different conditions of pedestrian load is significantly different. With the acceleration of step frequency and the increase and concentration of load, the floor's vibration response becomes more visible. In the route test, it is established that LCSF has the attribute of a unidirectional plate. The natural vibration frequency of similar floor slab can be calculated by the method of simulating the natural vibration frequency of beam element. The findings can serve as a guide for LCSF research and implementation.

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Section: Introductionmentioning

confidence: 99%

Experimental study on fundamental frequency and human‐induced vibration characteristics of light steel foam concrete composite floor

Xu,

Meng

et al. 2024

Structural Design Tall Build

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“…Considering the 1.6 Hz to 2.4 Hz human-induced excitation frequency range, when the excitation frequency closely aligns with the structural natural frequency, resonance phenomena can compromise user comfort and even evoke a sense of panic [10][11][12][13]. Most recently, serviceability evaluations on low-frequency floors, cross-laminated timber floors, concrete floors, lightweight timber floors, and reinforced concrete precast one-way joist floors can be found in [14][15][16][17][18], respectively.…”

Section: Introductionmentioning

confidence: 99%

Human-Induced Vibration Control of Floor Structures Using MTMD System Optimized by MATLAB-SAP2000 Interface

Zhang,

Shi,

Wang

2024

Buildings

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Under human-induced excitations, a floor structure may suffer excessive vibrations due to its large span and low damping ratio. Vertical vibrations, in particular, can become intolerable during resonance events. A tuned mass damper (TMD) is a widely used single-degree-of-freedom dynamic vibration absorber. To enhance the serviceability of a floor structure, a multiple TMD (MTMD) system finds broad application. The parameters of the MTMD must be carefully designed to achieve satisfactory performance. However, existing studies often employ a simplified model of the floor structure with closely spaced modes to optimize the parameters of MTMD. Nonetheless, an oversimplified floor model can lead to a reduction in its control effect. To solve this problem, this study utilizes the OAPI facility of SAP2000 to build a connection with MATLAB. A multi-objective optimization algorithm based on the artificial fish swarm algorithm (AFSA) for MTMD is developed in MATLAB, while the finite element model of a real floor structure is built in SAP2000. The locations of the MTMD system are initially specified in SAP2000 and, through the proposed MATLAB–SAP2000 interface, data can be exchanged between them. Based on the structural dynamic responses to external excitations in SAP2000, the optimization process for the MTMD is carried out in MATLAB. Concurrently, the parameters of the MTMD in SAP2000 are iteratively adjusted until they reach their final optimal values. To underscore the enhancements brought about by the proposed interface and optimization method, a comparative case study is conducted. A group of MTMDs, optimized using a conventional method, is presented for reference. The numerical results indicate that, overall, the proposed MTMD system exhibits superior control effectiveness and robustness.

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Finite Element Model for Vibration Serviceability Evaluation of a Suspended Floor with and without Tuned Mass Dampers

et al. 2023

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This study aims to provide an accurate finite element (FE) modeling method for structural vibration serviceability evaluation of the suspended floor under human-induced excitation. The fundamental dynamic characteristics and human-induced vibration responses of a typical suspended floor were first measured via a series of field tests. Subsequently, the overall and local equivalent FE models of the suspended floor were respectively established, and their applicability was then verified by comparing the predicted dynamic characteristics and responses of the suspended floor with the corresponding field test results. Finally, passive tuned mass dampers (TMDs) were designed for vibration control of the suspended floor using the local equivalent FE model, and the applicability of the local FE model in assessing the vibration serviceability of the suspended floor with TMDs was further confirmed via pedestrian-induced vibration tests. Results demonstrate that the simplified local equivalent FE model proposed in this study can well replace the complicated overall FE model to evaluate the vibration serviceability of the suspended floor with and without TMDs.

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Methods for the vibration analysis of reinforced concrete precast one-way joist slab floor systems under human walking

Cited by 3 publications

References 5 publications

Experimental study on fundamental frequency and human‐induced vibration characteristics of light steel foam concrete composite floor

Experimental study on fundamental frequency and human‐induced vibration characteristics of light steel foam concrete composite floor

Human-Induced Vibration Control of Floor Structures Using MTMD System Optimized by MATLAB-SAP2000 Interface

Finite Element Model for Vibration Serviceability Evaluation of a Suspended Floor with and without Tuned Mass Dampers

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