摘要：The main problem for steel thin-walled members, the local instability of compressed parts of crosssection, can be resolved by profiling (stiffening) of cross-section. By optimizing cross-section stiffeners arrangement, local instability can be completely prevented, and therefore member’s resistance can be increased without usage of an additional material. Beside stiffeners, the restraint of member’s flange with profiled sheet can have high influence on the resistance of these members. This article presents standardised procedures which allow quick and simple calculation of the stiffeners influence and for the influence of member’s flange restraint by sheet roof. The stiffeners influences and the restraint of C purlin by trapezoidal steel sheet are quantified on concrete example. In particular, the possibilities of modern standard EN 1993-1-3 are emphasized, which can, with a little extra designer work, provide significant savings from realistic consideration of thin-walled members.
其他摘要：Osnovni problem čeličnih tankostijenih nosača, lokalni instabilitet dijelova poprečnog presjeka koji se nalaze u tlaku, može se riješiti povoljnim profiliranjem (ukrućivanjem) poprečnog presjeka nosača. Optimizacijom rasporeda ukrućenja u poprečnom presje
关键词：thin-walled members;local instability;stiffeners;restraint of member flange with profiled sheet;EN 1993-1-3;savings
