Spacial Entity Analysis Of The Concrete Frame In Multi-storey And Highrise Buildings

When the strong-motion earthquake happens, many reinforced concrete frames in Chinese civil architecture often have failure of carrying capacity and go so far as to collapse wholly. It is studied in this paper by large-scale universal program ANSYS the problem about geometric non-linear effect on earthquake-resistant behavior of multi-storey and highrise concrete frame structure under strong-motion earthquake and is also analyzed in full spatial self-bracing function which is ignored by planar model of multi-storey and highrise concrete frame structure.Firstly, related to the problem about many kinds of geometric non-linear factors and shear deformation which are not differentiated definitely in a lot of studies, several kinds of beam element stiffness matrices respectively corresponding to geometric non-linear factors and shear deformation are derived as far as planar beam element is concerned and geometric non-linear factors of beam element in frame structure are analyzed systematically. Secondly, the author assumes material is elastic, separately adopts planar model and spatial model of the 6- 12- 18-storey spatial concrete frames reckons in shear deformation and axial deformation and contrastingly analyzes lateral displacement of the frames under TAFT. E1-CENTRO and TIANJfN seismic wave considering geometric non-linear effect or not in order to find out the rule about geometric non-linear effect on earthquake-resistant behavior of multi-storey and highrise concrete frame structure under strong-motion earthquake. Simultaneously, the author weighs the effect of spatial self-bracing function on structural analysis by contrasting lateral displacement between planar model and spatial model of the frames. Finally, the author has made some suggestions and data about geometric non-linear effect and spatial self-bracing function on aseismatic design of multi-storey and highrise concrete frame structure.