Research On Mechanical Properties Of Special-Shaped Columns Structures With Reduced Columns At The Bottom And Transfer Stories

With the engineering appliance on special-shaped columns structures with reduced columns at the bottom and transfer stories , the mechanical properties of which are required more research in engineering,but current related research is less. Integral of structures are strengthening because of the appling special-shaped columns,so the mechanical properties of R.C. frame structures with special-shaped columns of beam style transfer stories are different from the which of R.C. frame structures with beam style transfer stories .In this paper, based on the particularity of the structural modality, main contents and results are shown as follows:1.The ratio of lateral stiffness of R.C. frame structure with special-shaped columns of beam style transfer stories is studied by PKPM program. The effects of variety of ratio of lateral stiffness on the internal force and sidesway are analysed. Appropriate ratio of lateral stiffness in nonseismic, 6° classes of seismic measure ,7° classes of seismic measure(0.10g) , 7° classes of seismic measure(0.15g) is determined.2.The effects of rigidity variety of the lower supporting columns and the topper frame beams and columns on the forces of transfer girder are analysed by PKPM program and the effects of rigidity and section size variety of the transfer girder on the internal force of the members in the topper and the lower structure are also analysed.3. With the push-over method, and applying the software of SAP, the proper sampling of linear ratio between transfer girder and the bottom column is studied. It's affection on the failure principle is also studied.The analysis of R.C. frame structures with special-shaped columns of beam style transfer stories are of practical value and theoretical significance, and can be recommended in the design.