Seismic Response of Typical RC Tube and Steel Frame Composite Structure of Control Tall Tower Under Earthquake Excitation

摘要

Seismic response of each vibration mode of the tall tower model is obtained based on time-historians analysis method with respect to the reduced-scale model test. The modal damping ratio of the composite structure is discussed. The analyses of the calculation results reveal that the high-order modes contribute little to the seismic displacement of the tower. However, the high-order models play an important role in the seismic shear force of the tower. A real mode-decoupling method can be used to solve the dynamic equation under earthquake force. Revisions of influence coefficient in the seismic code for building in China are present in order to diminish calculation errors. The result of this research comes up with the earthquake resistant design theory and set up model earthquake resistant analysis of this kind of structure.