Characteristics of distributed aerodynamic forces on a twin-box bridge deck

Q. Zhu, You Lin Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

To facilitate an effective assessment of stress-related bridge performance and safety, stress-level buffeting analysis of a long-span cable-supported bridge is necessary. A stress-level buffeting analysis requires knowledge of characteristics of distributed aerodynamic forces on the surfaces of a bridge deck. This paper first presents a formulation for distributed aerodynamic forces on the surfaces of a bridge deck based on the quasi-steady theory. The characteristics of distributed aerodynamic forces, such as pressure coefficients, pressure admittances and span-wise pressure coherences, are introduced in the formulation. In consideration of different characteristics of incident and signature turbulences, the empirical mode decomposition is then adopted to separate their effects on the distributed aerodynamic forces. Wind tunnel pressure tests of a sectional motionless bridge deck model were conducted to identify the characteristics of distributed aerodynamic forces on the surfaces of the Stonecutters cable-stayed bridge with a twin-box bridge deck as a case study. The results indicate that the separation of incident and signature turbulence effects is necessary and that the proposed framework is feasible although more works need to be done towards a complete stress-level buffeting analysis.
Original languageEnglish
Pages (from-to)31-45
Number of pages15
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume131
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Distributed aerodynamic forces
  • Pressure admittance
  • Signature turbulence
  • Span-wise pressure coherence
  • Twin-box bridge deck
  • Wind tunnel pressure tests

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Civil and Structural Engineering
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Characteristics of distributed aerodynamic forces on a twin-box bridge deck'. Together they form a unique fingerprint.

Cite this