DEFLECTION OF STEEL CONCRETE COMPOSITE BEAMS IN REAL STRUCTURES AS BASIS FOR THE CALCULATION OF THE SERVICEABILITY OF BUILDINGS

摘要

Aim of the project is to measure deflections of standard steel concrete composite beams, used in office and industrial buildings, assess and analyse the reasons for those deformations and develop simple design aids for a realistic calculation of the deflections. This research is necessary, since experience shows that the calculated results do frequently not match the deflections measured on site. This can reduce the serviceability of a structure and lead to high rectification costs. It should be possible to take structural influences on the deflection, e.g. details of supports as well as imperfections during production of the beams and erection into account while dimensioning the beam, to get realistic results. We focus on the differences between calculations and reality by analysing the measured deflections of beams in structures under construction. The factors that lead to the differences will be pointed out and the reasons for them will be discussed.