Experimental and numerical studies on the vibration serviceability of fanshaped prestressed concrete floor

Abstract

An extensive experimental and numerical research was undertaken to study the vibration serviceability of a long-span fanshaped prestressed concrete floor system to be used in the lounge of a major airport. Specifically heel-drop and jumping impact tests were conducted to obtain the natural frequencies and modal damping ratios of the floor system, followed by the discussion on the distribution of peak accelerations. Running tests and simulation were also performed to capture the acceleration responses. Moreover, the finite element method was used to evaluate the dynamic characteristics. The floor system is found to have a low fundamental frequency (' 6.00 Hz) and the corresponding modal damping ratio (average ' 2.20%). The comparison of the experimental results with the published American institute of steel construction (AISC) design guide indicates that the prestressed concrete floor system exhibits satisfactory vibration perceptibility overall. The study results also show that the intensity and the location of impact excitation have a significant influence on the rate of acceleration decay. A crest factor b rp is proposed based on the test results to calculate the maximum root mean square acceleration for running for convenience.

Reliability of Field Experiments, Analytical Methods and Pedestrian’s Perception Scales for the Vibration Serviceability Assessment of an In-Service Glass Walkway

“…Starting from these conditions, the uncertainty of glass structures is that LG composite sections require careful estimates of the actual bending properties and/or restraints (see also [16,20]). Most of the HSI investigations of literature, in addition, have been carried out on various typologies of footbridges and floors made of timber, precast reinforced concrete, steel or hybrid members (see [43][44][45][46], etc.). Otherwise, studies focused on the vibration performance of glass pedestrian structures are still limited.…”

Dynamic analysis of floors subjected to rhythmic human activities based on the use of biodynamic models: numerical and experimental modelling

“…In each of those situations there may be one force location or various force locations. Therefore, two different techniques currently used in structures dynamic experimental monitoring are related to the single-input multiple-output (SIMO) and single-input single-output (SISO) (Cunha et al [12], Debona [13], Brandt [14], Gülbahçe and Çelik [15], Cao et al [16], Chen et al [17] and Brownjohn et al [18]). In SIMO methodology, the frequency responses between various structure sections and the excitation point are measured.…”

Slender precast voided slabs underwalking‐inducedvibration

“…As such, information in literature about this subject are relatively scarce. After the pioneering framing of the problem, [5][6][7] the topic of vibrations in service of concrete structures has been assessed in literature mainly referring to pedestrian bridges [8][9][10][11] and cast-in-situ concrete floors, [12][13][14][15][16][17] eventually posttensioned, although few papers were recently published about the issue of human-induced vibration on precast pretensioned concrete hollow core members. 18,19 It is also worth recalling that those elements are characterized by similar slenderness with respect to the floor element analyzed in this paper, but higher mass due to the higher concrete volume employed.…”