Steel wire ropes � Pre-fabricated parallel wire strands for suspension bridge main cable � Specifications

Suspension-bridge cables are constructed from strands of galvanized steel wire. They are failure-critical structural members, so a fundamental understanding of their mechanics is imminently important in quantifying suspension bridge safety. The load-carrying capabilities of such strands after local wire failures have been the subject of many theoretical studies utilizing analytical equations and finite-element analysis. Little experimental data, however, exists to validate these models.Over the past five years we have developed a methodology for measuring stress/strain transfer within parallel wire strands of suspension bridge cables using neutron diffraction [1,2]. In this paper we describe the design and verification of parallel cable strands used in our studies. We describe the neutron diffraction strain measurements performed on standard 7-wire and expanded 19-wire models in various configurations at both the Los Alamos National Laboratory Spectrometer for Materials Research at Temperature and Stress (LANL SMARTS) and at the Oak Ridge National Laboratory VULCAN Engineering Materials Diffractometer (ORNL VULCAN). Particular attention is placed on the challenges of aligning and measuring multibody systems with high strain gradients at body-to-body contact points.

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Construction Technology and Organization of Jiande Yangxi Main Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.1988 ◽

2013 ◽

Vol 671-674 ◽

pp. 1988-1992

Author(s):

Xi Jiang ◽

Tian Qing Yu

Keyword(s):

Steel Wire ◽

Suspension Bridge ◽

Construction Technology ◽

Main Cable ◽

Construction Operation ◽

Operation Platform ◽

Main Girder ◽

Wire Strand ◽

Main Bridge

The Yangxi main bridge for 49+120+49 m the self-anchored suspension bridge, the main girder procedure full framing in situ girder construction, bridge tower using piecewise casting method construction, use scaffolding as construction operation platform. Main cable construction using prefabricated parallel wire strand method (PPWS), first within the plant into steel wire strand, roll in the drum on delivery to the bridge site erection points, with traction rope by stock installation in place. Saddle the fission lifting, cable clamp installed application to the calibration of jack import screw tension 420 kn, and three times repeated tension, sling the factory-made after installation in place. Can be used as the same bridge comparison and reference.

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