A Study of Dynamic Wind Effects on High-Rise Building with Tube-in Tube System in Norway

Abstract

According to a new high-rise strategy, Norway is expected to have more tall buildings. However, due to a lack of knowledge and experience in high-rise technology, the country has not built many such structures yet. To address this issue, a study was conducted to analyze the response of a high-rise building to dynamic wind load, considering the low seismic activity in the region. The study is divided into two parts: theoretical and modeling. The theoretical part covers the basics of dynamic structures, FEM-design, material properties, design of wind load, and assessment criteria for high-rise. The modeling part involves constructing a 200-meter-tall high-rise using the tube-in-tube system, with a concrete core and steel frame. The FEM-design was used to construct the structure, and two connection configurations, pinned and rigid, were established for comparison. The design wind load was based on NS-EN 1991 and the wind simulator NOWS. Based on the results obtained, it was observed that the structure met the serviceability criteria for max top displacement and acceleration comfort criteria. The building also exerted relatively low stresses on structural elements and deformed only elastically when subjected to both quasistatic and dynamic wind load. Furthermore, the results demonstrated NS-EN 1991 as a highly conversative approach for wind design.