Investigation of the vibration properties of concrete elevated hospital helipads

Elevated helipads at hospitals offer the possibility of rapid transport and assistance to persons injured in accidents or severely ill. Such helipads may have a diverse structure and location-depending on the possibilities of the hospital environment, including the vicinity of other buildings. Vibroacoustics Laboratory of the Institute of Aviation performed the measurement of the vibration properties of several helipads of varying degrees of construction. These tests were intended to determine the vibration properties of the helipads as well as the building, as an attempt to access the impact of the vibrations induced during a helicopter's landing and take-off on the construction of the helipad, the building and its equipment. This paper presents the tests and some results of the measurements made with a modal hammer, carried out on two new elevated helipads, built on the building's roofs and an estimation of the impact of the helicopter on its construction at the stage of design and construction of the helipad.