A Study on the Strain of Greenhouse Frame by Typhoon

태풍에 의한 온실구조재의 변형도 고찰

This research was performed to study the actual behavior of 1-2W type pipe greenhouse under the influence of typhoon by measuring the vairous strains instructural materials. These results can eventually be utilized in the desgin criteria as well as in the modification of conventional equaltion for calcu more realistic wind loads. Tehfirst data under the influence of Typhoon Olga arrived in Jinju on Aug. 1999. Were obtained by strain gage with 10 sensor points. According to the data obtained, the typical variation ofstrain depending on wind patter could be observed. The strains in structural frame were fluctuated very sensitively depending on the direction and magnitude of wind velocity. But some of the data were lost or missed by system's failure. A kind of inherent vibration pattern of greenhouse pipe frame was observed from the plotted data, but this phenomenon is not so clear as to be separated from the overall fluctuation so far. This experimental research is expected to be continued as a long term project to measure and analyze the strain pattern of structural frame depending on the various locations and section characteristics by wasy of adopting more efficientg instrument with sufficient number of measuring points and accuracy.