Influence of external structure and internal stacking on wind load characteristics of large-span spherical shell structure

Xiaobing Liu, Anjie Chen, Qun Yang, Bin Feng and Xuedong Tian

Abstract

To investigate the wind load characteristics of a large-span spherical shell structure, a rigid model pressure test was conducted in a wind tunnel laboratory. The study aimed to examine the impact of various external structures and internal stacking forms on the wind loads of a spherical shell structure in a practical engineering project. This project features two adjacent spherical structures, each spanning 130 m and standing 67 m tall. These two structures are connected by trestles and a transfer station. Variations in the shape factor and the integral force coefficient of the structure were compared and analyzed under different test cases. The results indicate that when two structures are arranged in series, with the adjacent structure positioned upstream, the shape factor of the structure is most affected, resulting in a significant reduction effect at the bottom of the windward surface. Compared to the external structure, the impact of various internal stacking forms on the shape factor of the structure is relatively weak. The adjacent structure significantly improves the wind resistance of the main structure. The integral force coefficient of the structure reaches its peak when internal stacking is full and is at its lowest when there is no internal stacking.

Key Words

external structure; integral force coefficient; internal stacking; shape factor; spherical shell structure; wind load; wind tunnel test

Address

Xiaobing Liu:1)State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 2)Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China 3)School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China Anjie Chen:School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China Qun Yang:1)State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 2)Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China 3)School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China Bin Feng:School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China Xuedong Tian:School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

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