Steel and concrete composite structures are becoming a more and more common solution forbuildings, since its structural efficiency and fast erection methods make its use economically competitive.A parametric study dealing with steel and concrete composite structures for typical office buildingsbraced horizontally and with regularly spaced columns is presented. The varying parameters are the typeof column layout, the spans and the structural steel class. The general modeling principles of thesebuilding structures are briefly described, and for each structure within the parametric study thestructural layout and geometry, the design criteria meeting ultimate and serviceability limit states, andthe most representative internal forces are presented and discussed. Furthermore, the steel weight of themain and secondary girders, of the columns, and of the whole structure is analyzed and presented in theform of illustrative graphics, relating the amount of steel to the span and to the structural steel class.
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