Development of Design Criteria for CCTV Camera Poles

Details

• Creators:
  Abolmaali, Ali ; Ardekani, Siamak A. ; Jung, Jiwon
• Corporate Creators:
  University of Texas at Arlington. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Texas Department of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Cameras Closed Circuit Television Deflection Design Fiber Reinforced Plastics Finite Element Method Poles (Supports) Pretensioning Steel Testing
• Publication/ Report Number:
  FHWA/TX-06/0-4470-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  February 2003 -August 2005
• Corporate Publisher:
  Texas. Department of Transportation
• Abstract:
  Design equations for steel and Fiber Reinforced Polymer (FRP) Closed Circuit Television (CCTV) camera poles are developed using full scale experimental testing and detailed finite element analyses. This study presents the development of three-parameter load-deflection models for steel and FRP poles commonly used to support CCTV cameras. An experimental investigation is carried out to obtain static load-deflection characteristics of tapered octagonal steel cross section and circular FRP cross section poles. Numerical results generated from a three-dimensional isoparametric finite element model (FEM) considering coupled nonlinear algorithms for material, geometric, contact, and pre-tensioning effects are compared with those obtained experimentally. Eight-node elasto-plastic solid element is employed to model the pole, endplate, bolts, concrete base, and laboratory reaction floor. The laboratory reaction floor is modeled with a thick plate having infinite stiffness. The pretensioning effect is modeled by using a pretension element. A surface-to-surface contact algorithm is used to simulate the interaction between contact surfaces of bolt head, shank, and nut with endplate and bolt holes. Newton-Raphson scheme is used in the nonlinear regime, and convergence is checked using Hilbert L-2 norm and energy-based convergence. A parametric study is conducted to verify the validity of the FEM and the analysis algorithms by observing the effects of the geometric and force-related variables, one at a time, on the load-deflection characteristics of the poles.
• Format:
  PDF
• Funding:
  0-4470
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8426111f2054ba1abcf13468a8e4594b9480e991b0058b26d75012f7b5fdd4ec4c72b1fddb31b5778085582f8e6ab7f3f5e57315549e5095c49c882a465b10ad
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87909/dot_87909_DS1.pdf
• File Type:
  [PDF - 16.64 MB ]