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This Book concerns floor vibration, describes the nature of floor vibration and provides options for avoiding it through design, or in the case of existing buildings, reducing or eliminating it through alterations. Excessive floor vibration has become a great problem as new rhythmic activities, such as aerobics, generators, air conditioners and long-span floor structures have become more common. The current push towards stronger concrete materials and the use of prestressing results in increasing fineness and dynamism of long-span concrete floors in buildings. Although concrete floors have a...

This book outlines an extensive and elaborated experimental work to attain the objectives set in the thesis. The material properties of concrete, profiled steel (PSF) and vibration damping compound (VDC) are investigated in the laboratory to carry out the theoretical calculation of this study. For the prediction of time-dependent deflections of floors, compressed test of concrete were conducted in the laboratory. The experimental work is divided into two groups. In the first group, the dynamic performance (acceleration, force, and damping) of floors are investigated. The second group of...

Chemical modification is an often-followed method to replace glass fibers with wood fibers to reinforce polymer composites in order to produce biomaterials. However due to the surface incompatibility and weak adhesion between polymer and fiber, many new chemical and binder added were introduced by researchers to improve the mechanical and physical properties of wood polymer composites (WPC). In this study, liquefied tropical wood polymer composites (LTWPC), WPC, treated WPC (TWPC) and binder treated WPC (BTWPC) composite panels were made by using hot-press moulding with varying formulations...

The generation of the impact sound by the act of the human walk involves two factors, the character of the footfall and the shape of the induced floor vibration. High levels of vibrations can occur in floor systems due to excitation from human activities such as walking and aerobics. In building floors, excessive vibrations are generally not a safety concern for building floor system but a cause of annoyance and discomfort. The footfall noise is created by the impact excitation where the character of the footfall depends on the foot-ware: the heels and the frequencies of the footfall. The...

A composite concrete floor is proposed in this book to suppress stationary random vibration in concrete structures using a compound vibration absorber named vibration damping compound (VDC). While the traditional vibration absorber can damp down the vibration mainly at the pre-tuned mode of the primary structure, active damping is generated by the proposed VDC to damp down all resonant modes of interest of the vibrating structure and the spatial average mean square motion of the vibrating structure can be minimized. Only one absorber and one feedback signal are required to achieve vibration...