Wind-Induced Response and Equivalent Static Wind Loads on Single-Layer Saddle-Shaped Shells
Publication: Journal of Structural Engineering
Volume 150, Issue 10
Abstract
Saddle-shaped roofs are one typical kind of large span roofs, but there are few studies on the equivalent static wind load (ESWL) of saddle-shaped roofs, which is important for structural design. This study conducts wind pressure measurements of saddle-shaped roofs with three typical rise-span ratios (, , ) by wind tunnel tests. Subsequently, the influences of wind and structural parameters on dynamic responses and ESWLs are investigated for 81 single-layer saddle-shaped shells with different structural stiffness, including rise-span ratio, span length, roof mass, and incoming mean wind velocity. The results show that the most unfavorable wind directions of the peak structural responses for single-layer saddle-shaped shells are 60° and 90°, as well as the axisymmetric wind directions corresponding to these two wind directions, i.e., 120°, 240°, 270°, 300°. Finally, a simple fundamental vector is proposed to express the multitarget ESWLs for single-layer saddle-shaped shells to reproduce multiple peak responses at the most unfavorable wind directions. Through parametric analysis, mean pressure coefficients of roof zones are proposed. Within the investigated parameter ranges, the fluctuating ESWL coefficients are expressed as the functions of the reduced structural frequency at the most unfavorable wind directions, which is very convenient for structural engineers to determine the wind loads on main force resisting structural systems.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The work was partially supported by the National Natural Science Foundation of China (Grant Nos. 52078088, 52221002), and the 111 Project of China (Grant No. B18062).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 10 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Dec 10, 2023
Accepted: Apr 24, 2024
Published online: Jul 19, 2024
Published in print: Oct 1, 2024
Discussion open until: Dec 19, 2024
ASCE Technical Topics:
- Continuum mechanics
- Design (by type)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Forces (type)
- Load factors
- Roofs
- Shell structures
- Solid mechanics
- Static loads
- Statics (mechanics)
- Structural analysis
- Structural design
- Structural dynamics
- Structural engineering
- Structural systems
- Structures (by type)
- Wind engineering
- Wind forces
- Wind loads
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