The CLT-concrete composite (CCC) solution is appealing since it possesses many advantages of a timber-concrete flooring system with small thickness. However, the vibration criteria usually an obstacle in design process, especially more onerous for long-span floor. present study focus on dynamic properties (fundamental frequency and damping) CCC beams featured notched connectors. Three were fabr...

In this paper, the stress-related damping ratio formula of box girder with corrugated steel webs is introduced. Using response spectrum method, an iterative algorithm is proposed to calculate the seismic response and the stressrelated damping ratio under different seismic intensities. Based on a simply supported composite box girder bridge with corrugated steel webs, the stress-related damping ...

In recent seismic analyses, it is considered that the structural damping ratio should be treated as independent of frequency, for safety side estimation. Therefore, frequency-insensitive required realistic simulations. This paper investigates performance various sparse matrix models (extended Raleigh, capped viscous and uniform damping) in inelastic analysis a 35-story moment-frame steel buildi...

Ground-motion prediction equations that are used to predict acceleration values are generally developed for a 5% viscous damping ratio. Special structures and structures that use damping devices may have damping ratios other than the conventionally used ratio of 5%. Hence, for such structures, the intensity measures predicted by conventional ground-motion prediction equations need to be convert...

The effect of using elastic glue in between a timber construction’s two floor layers – gypsum board and particle board – was investigated. In a new timber based building, the impact sound insulation was reduced by 2 dB when elastic glue was introduced in the production. To find out the long-term effects, six different elastic glues was involved in a laboratory test in which layers of floor plas...

The current study focussed on analysing natural frequency and damping of laminated composite beams (LCBs) by varying fiber angle, aspect ratio, material property boundary conditions. Ritz method with displacement field based the shear normal deformable theory is used modal calculated using strain energy method. Effects symmetric angle-ply cross-ply, anti balanced quasi-isotropic lay up schemes ...

In the wind tunnel test of a long-span bridge model, to ensure that dynamic characteristics model can satisfy design requirements, it is particularly important accurately identify modal parameters model. First, stochastic subspace identification algorithm was used analyze in test; then, Grubbs criterion introduced effectively eliminate outliers damping ratio matrix. Stochastic with improved acc...

Abstract -Regenerated (FRF curves), synthesis of (FRF) curves there are two main requirement in the form of response model, The first being that of regenerating “Theoretical” curve for the frequency response function actually measured and analysis and the second being that of synthesising the other functions which were not measured,(FRF) that isolates the inherent dynamic properties of a mechan...

A physically-based computational model is developed to predict the damping behavior of oxide thermal barrier coating systems. The constitutive damping model is derived from the theory of point defect relaxation in crystalline solids and implemented within a finite element framework. While oxide coatings have been primarily employed as thermal barriers for gas turbine blades, there is a growing ...

The paper presents the theoretical basis for modal analysis of a general nonconservative system. The modal analysis uses only real modes in terms of the displacements as well as velocity coordinates and converts the system to a real, uncoupled, second-order form. This is the first time that such a transformation has been presented in the literature. Earlier works presented modal analysis in the...