Abstract:

In order to reduce the damage of concrete core tube of high-rise buildings caused by vibration， the seismic performance simulation method of concrete core tube of high-rise buildings based on static pushover analysis algorithm was studied. A high-rise building concrete core tube with buckling constraint bracing was selected as the research object， and the seismic performance of high-rise building concrete core tube based on static nappe analysis algorithm was simulated with software PKPM. The test results show that the distribution of the lateral force of the static nappe has great influence on the calculation results of the apex displacement angle and the base shear force of the concrete core tube in high-rise buildings. In the X-direction， the base shear curve of concrete core tube supported by buckling constraint increases exponentially. The stiffness of concrete core tube decreases and the proportion of column shear increases under strong vibration. When ductility coefficient is constant， the ratio of energy spectrum of high-rise concrete core tube is positively correlated with stiffness reduction coefficient. The damage of concrete core tube in high-rise building caused by longer strong earthquake duration increases with the increase of strong earthquake duration. With the increasing of the characteristic stiffness value， the proportion of the energy consumption of shear wall in the total hysteretic energy consumption ratio decreases， while the proportion of the energy consumption of frame beam and column increases and the distribution pattern is roughly linear.

Key words: static nappe analysis, high-rise buildings, concrete core tube, seismic performance simulation, vertex displacement angle, base shear