Seismic Behavior Of Innovation RC Frame In High Seismic Region

Conventional brace is prone to buckling under pressure of earthquake, and withdraw from the work, led to the rapid decline of the overall stiffness, is harmful to the structure. In order to prevent the brace from compression buckling, after many years of research, scholars abroad develop a brace which could avoid buckling, called Buckling-Restrained-Brace. Such brace yields before compression buckling, has the same tension and compression properties, so even in the relatively large structural deformation, the brace can provide structural strong lateral stiffness, and because of yielding of the core components, the brace can give full play to their energy performance.The study of BRB's performance is on growing, including the section of core components, stiffness of out-component, the gap's size between out-component and core component and energy performance of single BRB and so on. This article is studied mainly for Seismic behavior of RC frame with Buckling Restrained Braces in high seismic region, and provides a design process of the Buckling Restrained Braces, which is used in the stiffness-insufficient concrete frame structure. With a project example, this article carries out a design and arrangement of the Buckling Restrained Braces in the primary frame structure, and has done static analysis and time-history dynamic analysis with software of ANSYS and PKPM. After the layout of brace in structure, since the addition of brace, internal force distribution of structure are different from original structure. To ensure that the structure under earthquake meet earthquake-proof standards, this article analysis the difference of the plastic development between conventional brace and BRB, different core sections and different layouts of brace through numerous examples with software of ANSYS and SAP2000. The results show that, BRBs have brought fine functions into increasing structure stiffness, diminishing story displacement, and energy dissipation ability. To ensure the structure under earthquake meet earthquake-proof standards, we should take a reasonable cross-section area and layout of BRB.