Influence Analysis of Connecting Style on Vertical Earthquake Response of High Rise Buildings with Connecting Structure

Abstract eng:
The vertical earthquake actions of high rise buildings with connecting structure are necessary to consider for there are abundant vertical vibration modes of the connecting body with big span usually. In this paper, high-rise building examples with connecting structure are designed with 4 kinds of joining style popularly in practice. Then, the vertical earthquake actions of examples are analyzed. Based on the analysis results, the influence of connecting style on the vertical earthquake action of connecting structure and main structure are investigated. Based on the analysis, the following conclusions are achieved: ① The overall dynamic characteristics of the connected structure with symmetric towers are very limited changed with connecting way of the 4 types, as well as the vertical vibration mode; ②Under vertical earthquakes, the shear force of the bar at end span of corridor due to the vertical earthquakes is the biggest in the model R-R, while the smallest in the model H-H, So for the connected structure design, the connecting style H-H would be better, ③The vertical displacement of the connected structure is too small to influence the its design. ④The ratio of the axial force caused by the vertical earthquake action and the dead load in column 1 which supports the connected structure is too big to ignore. The conclusions above could be considered during the actual design.

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