Seismic performance of vertical hybrid structure consisting of reinforced concrete pipe column and steel truss
1.State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 2.Department of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an, Shaanxi 710055, China; 3.NorthWest Electric Power Designing Institute, Xi′an, Shaanxi 710032, China)
Abstract：By means of the plastic hinge method, an elastic-plastic model for an actual structure was established. The failure mechanism of the structure was analyzed by the elastic-plastic time-history analysis. According to the performance index of the internal-equipmentbased seismic design method, the seismic performance of the structure, and the effect of the reinforcement ratio and wall diameter ratio of the concrete pipe column were analyzed. The results indicate that under the 7-degree intensity of the seldomly occurred earthquake, the seismic performance level of the structure is satisfied with the basic fortification requirement of the internal-equipment-based seismic design. The columns are the single defense line for the structure to resist the earthquake action, and the corner／inner columns are firstly damaged. Most plastic hinges of the steel truss occur in the cantilever range and around the top of the columns. The total longitudinal reinforcement ratio and wall diameter ratio of the concrete pipe column could be greater than 05％ and 0100, respectively.
2010, Vol. 31 
