Abstract
In this study, the vibration acceleration and radiation structure noise in specific points, 30 cm away from the center surface of each plate of the concrete deck, web, and flange of the steel beam, are measured via the hammering test. The test is conducted on the middle concrete deck of an 8.5 m steel-concrete composite slab beam. The accuracy of the numerical model is then carefully justified. The influence of the number of shear studs, spacing, and arrangement of ribs on the concerning results is methodically examined and discussed by employing the numerical model. In the center frequency of 10–1000 Hz, the total sound power level of the structure can be lessened by improving the concrete deck thickness as well as the number of shear studs. The reduction of the rib spacing can effectively lessen the sound power level as well. The noise reduction of the plate with rib arrangement in the midspan zone is more influential than the case with uniform layout in the whole span.
Highlights
A steel-concrete composite plate beam (SCCPB) is commonly in connection with shear connectors to appropriately merge the concrete deck and steel girders, which provides many advantages and has been broadly exploited in recent years
One of the main problems in steel-concrete composite beam structures is that the vibration and noise caused by the excitation are significantly higher than those of the concrete beam. e structure-borne noise cannot be effectively reduced by employing the sound barrier. erefore, it is necessary to find a way to suppress the vibration and radiation structure-borne noise of the steel-concrete composite beam
Based on the statistical energy principle, the paper aims to examine the structureborne noise of SCCPBs. e obtained results revealed that the web of the steel beam is the main radiation source of structure-borne noise, with a contribution rate of more than 50%, and the frequency band of the structural noise was generally in the range of 125–1250 Hz [3]
Summary
A steel-concrete composite plate beam (SCCPB) is commonly in connection with shear connectors to appropriately merge the concrete deck and steel girders, which provides many advantages and has been broadly exploited in recent years. Based on the statistical energy principle, the paper aims to examine the structureborne noise of SCCPBs. e obtained results revealed that the web of the steel beam is the main radiation source of structure-borne noise, with a contribution rate of more than 50%, and the frequency band of the structural noise was generally in the range of 125–1250 Hz [3]. Fewer works have been devoted to the vibration and noise reduction in SCCPBs. e influences of the crosssection size and material parameters on the radiated structure-borne noise of steel bridges have been studied by establishing the finite element FE-SEA hybrid model [9]. The effects of the structural design parameters, number of shear studs, spacing, and arrangement of ribs on the radiated sound power level of SCCPBs will be investigated and discussed by employing the verified numerical model. It provides ideas for the noise reduction design of steel-concrete composite plate beams
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