The international criteria for the serviceability evaluation of floor vibration include housing performance. This study mainly investigated the vibration characteristics of the renovation module of the iFLASH system. The novel floor system investigated is an innovative, fire-proof, lightweight, absorbed, shallow, and hybrid system, i.e., the iFLASH system, consisting of a nano-composite between the upper and lower steel plates, as shown in Figure 1. Therefore, this study investigated the vibration characteristics of a novel floor system that attains structural efficiency by improving constructability, shortening the construction duration, and reducing the self-weight.
IFLASH ONE 2 CHARGE PC
In particular, the PC method possesses a drawback of low economic feasibility, in contrast to the cast-in-place method, owing to the additional costs resulting from the extra processes and freight charges.
IFLASH ONE 2 CHARGE INSTALL
However, some limitations remain, such as the heavy weight, the concrete-topping placement, and the need for skilled workers to install joint connections. Precast concrete (PC) construction resolved this problem by shortening the construction duration and improving the constructional efficiency by decreasing the production of molding compositions and the amount of cast-in-place concrete. However, the system possessed a constructability issue, i.e., the beams had to be embedded inside the slab, thus complicating the structure. The iTECH composite beam, TSC composite beam, MHS composite beam, and Smart beam in Korea, and a deep deck with an asymmetric beam, Flex Fram, and Slim Floor with Half PC were developed to decrease the floor height and improve serviceability in the United States and Europe.
Accordingly, studies on novel composite structures have been actively conducted for floor-height reduction and to improve constructional efficiency, thereby increasing spatial efficiency and lease revenue. High-rise buildings are increasingly defining the architecture of modern society due to an increase in the urban population and facility intensification. This paper presents the results of the dynamic characteristics and serviceability testing as basic data for the vibration characteristics of the iFLASH system.
To evaluate the floor vibration performance of the iFLASH system, an experiment was performed in two buildings where the system was applied. As the general thickness of the iFLASH system ranges from 25 to 30 mm, it must have a sufficient floor vibration performance in order to be utilized. However, studies on the vibration characteristics of this new floor system have not been performed yet. This system can shorten the construction duration and decrease the floor height and structural weight, owing to features such as a low thickness and light weight. An innovative fire-proof, lightweight, absorbed, shallow, and hybrid (iFLASH) system was developed to solve construction site issues, such as improving constructability, reducing construction time, and attaining structural efficiency by reducing the weight of the building structure. Studies on novel composite structures that can decrease floor height and improve constructional efficiency in order to increase spatial efficiency and lease revenue have been actively conducted.