Evaluation of Floating Floor System with Steady State Dynamics Simulation in the Context of Impact Sound Level

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Nering, Krzysztof^1 ; Stypula, Krzysztof^1

Cracow University of Technology, Warszawska 24 St., Cracow

31-155, Poland^1

关键词: Acoustic performance;    Design levels;    Execution errors;    Floating floor;    Floating floor systems;    Floating slab;    In-situ test;    Vibration velocity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/6/062017/pdf
DOI  :  10.1088/1757-899X/471/6/062017

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Evaluation of floating floor at the design level imposes to take into account assumption of proper execution of this system, which means assertion of proper localization of dilation. Aim of this research is to analyse usefulness of Steady State Dynamics (SSD) simulation in the context of floating floor performance and execution errors such as global or local lack of circumferential dilatation. For this purpose, two-storey building with one room at each floor was simulated. Floating floor system was applied at structural ceiling between upper and lower floor. Excitation of system was done by application of pressure with given frequencies at central part of floor. Three types of systems were analysed: system without floating floor, system with properly executed floating floor and system with floating floor short-circuited to walls. Application of dynamic bridge was done gradually - at each wall - till whole floating floor was short-circuited. In the result of correlation between akin in-situ test compatible with standards, normative prediction of weighted impact sound reduction index and SSD simulations results was evaluated. Moreover, influence of dynamic short-circuit on floating floor system was analysed. Finally flanking vibration transition between upper and lower room with different systems was discussed. Principal conclusion of performed analysis is fact that SSD simulation results are sufficient to show vibration velocity spectrum nature of changes between systems with and without floating floor. What is more application of dynamic bridges at circumference of floating slab makes given system similar structural ceiling only system, which meets with akin in-situ test in matter of acoustic performance - similar nature of results of impact sound level with and without floating floor. Nevertheless, SSD simulation results are hardly agreeable with normative prediction and in-situ test of weighted impact sound reduction index.