Steel elements exhibit varying characteristics during site installation after shop manufacturing. There may be a mix-up owing to unclear management methods for transport, and deformation might occur during field installation. Moreover, the technical basis for evaluating repair methods is narrow. In this study, variations in material properties after performing mechanical calibration were determined for widely used steel types, such as SS400 and SM490, in which thicknesses of 30 mm and less are frequently used on sites. The test results showed that the mechanical calibration in unheated and thermal heating cases increased the yield strength and tensile strength of steel, and the Korea Standard value was satisfied. A yield ratio of approximately 85% or less was obtained, indicating sufficient toughness. In addition, variations owing to thermal heating did not occur when temperatures below 650 °C were applied.

No abstract

A study on the structural performance of the tensioning air beam system (TABS) is presented. TABS consists of the air beam, steel frames and cable struts and is a hybrid structural system. This system has the advantage of reduced self-weight and is easy to construct while it can improve the load bearing capacity of membrane structures. It maximizes the structural capacities of individual elements, thus can be considered as a very effective system in both structural and economical aspects. In this study, a structural test was carried out to investigate the structural performance of TABS under different membrane pressure conditions. A simple analytical model was proposed to predict the structural behavior of TABS and its validity was evaluated by comparing its results with the test values.

No abstract