Abstract:

In order to study the dynamic response of the upper structure of high-rise building under the far-field explosion shock waveloading, 1∶30 scaled models of high-rise building are designed for the field explosion experiment. The shock wave pressure curves and the displacement parameters at different heights of the modelsare obtained through experiment, and the experimental loading state is judged by the numerical simulation method. The damage patterns of the models and the measured data are analyzed. The results show that the failure mode of high-rise building frame column is mainly subjected to shear failureand the frame beam is mainly subjected to bending failureunder the effect of far-field explosion shock wave. In addition, the interaction between different components has an important influence on the failure mode. When the angle between the explosion center and the building is less than or equal to 25°, the pressure parameters of shock wave are the same all over the surface.When the whole structure is still in the elastic deformation stage, the change curves of horizontal displacement in the early stage of each height position approximately coincide with each other, and the motion periodsare consistent.The peak values of the displacement are different in the later stage due to the different heights, which are linear with the heights. The deformation and damage of the building mainly depend on the specific impulse, and are little affected by the peak shock wave pressure.

Key words: high-rise building, far-field explosion, explosive shock wave, chemical explosion test, displacement response