Publication: Effect of glass on stiffness of the cable-net structure under the static and dynamic conditions
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Date
2020-08
Authors
Marzuki, Nur Ashikin
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Abstract
Structural glass facade or cable-net supported glass façade has been widely used as a modern building facade in engineering construction for a long-span structure of greater than 7 meters owing to its simple, light and transparent structures and these advantages make it dominant in airport, lobby and others. The contribution of glass to the stiffness on a cable-net structure normally neglected since the effect has small percentage under static load compared to a dynamic load. Nevertheless, glass panels prone to provide structural stiffness of a cable-net structure when the cables are damaged or pre-tension losses. This research aims to investigate the damages occurred within the components of a cable-net structure has determining the contribution of glass stiffness on the cable-net structure with and without glass panels under both static and dynamic behavior. An experimental carries three components of component failures, including cable-connector, cables and glass panels. The glass stiffness contribution on the performance of cable-net structure was determined from the deflection and natural frequencies of the cable-net with and without glass panels under static and dynamic behavior. Under different pre-stress level of cable forces (1000 N, 1500 N and 2000 N), the contribution of glass stiffness to the cable-net structure increased with increased cable forces within 7% to 24.5%. No major effect was readily seen in the deflection for each cable losses within edge cable to provide the huge impact upon the structure, similarly with the cable connector failure where the difference only found less than 5%. The major contribution from glass stiffness are more significant as the cable being totally damaged to contribute 7.2% to the cable-net structure. Nevertheless, under dynamic loading, when both direction of the cables subjected to cable losses, the natural frequency of the cable-net structure decreased with increasing pre-tension losses, but cable-net structure with glass panels have a small difference between in each losses, i.e 0.12 Hz from 30% to 60% losses and 0.18 Hz from 60% to 100% compared with the cable-net structure without glass panels where 0.33 Hz from 30% to 60% and 1.06 Hz from 60% to 100%. It showed that the glass panels has significant contribute the stiffness to the cable-net structure. Hence, it is important to consider the contribution of the glass to the stiffness of a cable-net structure where the design of the cable-net structure can be proposed by consider the glass panels during the design process.