ABSTRACT
Corridor buildings in primary and secondary schools have shown serious damage in previous earthquakes. To study the difference between the actual natural vibration period and the structural design model of corridor buildings and analyze the causes, four typical corridor buildings were selected. The ambient vibration measurement was used to test the fundamental translational and torsional frequencies of the structures, and the structural calculation model was reproduced based on the original design drawings. The results show that the actual periodic reduction factors of the structures are between 0.3 and 0.5, which are lower than the specified values of 0.6 to 0.7 in the code. The number and layout of infill walls have varying degrees of influence on the natural vibration period in the three directions of the structure, with infill walls contributing much more to the lateral stiffness than the longitudinal stiffness. At the same time, the torsional stiffness of the structure is greatly improved. The calculation model without considering the infill walls cannot correctly evaluate the natural vibration periods in all three directions. The layout and working state of infill walls should be fully considered in the design to correctly evaluate the design seismic force.
