Vibration response of cement structures under conditions of impact loads

Yiqi Huang; Zhaoyu Luo

doi:10.3139/120.110516

Article

Vibration response of cement structures under conditions of impact loads

Yiqi Huang and Zhaoyu Luo

Published/Copyright: December 11, 2013

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From the journal Materials Testing Volume 55 Issue 11-12

Abstract

A flexible function layer between concrete base and pavement slab is constructed to avoid slab breakdowns caused by poor vibration damping and energy absorption of cement structures. Practical experiments as well as testing and analyzing systems are employed to collect the frequency signals from the pavement structure vibration for a small pavement slab structure subjected to a ball-drop impact. The results reveal that the vibration can be damped out and energy can be absorbed using such a flexible function layer. Based on the contrastive tests, the pavement slab vibration is a declining process under the impact load. The vibration damping effect is more significant with the increase in thickness of the function layer, but becomes slower if the layer reaches a certain thickness. The tests also show that the flexible function layer has a significant role in the vibration damping and energy absorption.

Kurzfassung

Zwischen einem Betonfundament und einer Pflasterplattenstruktur wird eine flexible Funktionslage eingebaut, um Plattenbeschädigungen, die durch schlechte Vibrationsdämpfung und Energieabsorption verursacht werden, zu vermeiden. Hierzu werden praktische Versuche sowie Prüf- und Analysesysteme angewendet, die die Frequenzsignale der Pflasterplattenvibration einer kleinen Pflasterstruktur unter Ball-Falllast sammeln. Die Ergebnisse zeigen, dass die Vibration gedämpft wird und die Energie durch eine flexible Funktionslage absorbiert wird. Basierend auf kontrastierenden Versuchen stellt sich die Vibration der Pflasterplattenstruktur als Abklingprozess unter der Stossbelastung dar. Der Vibrationsdämpfungseffekt ist mit Zunahme der Funktionslagendicke deutlich ausgeprägter, während er zunehmend geringer wird, wenn die Lage eine bestimmte Dicke erreicht hat. Die Versuche zeigen auch, dass die flexible Funktionslage eine signifikante Bedeutung für die Vibrationsdämpfung und Energieabsorption einnimmt.

References

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Published Online: 2013-12-11

Published in Print: 2013-11-15

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Articles in the same Issue

https://doi.org/10.3139/120.110516