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- W55592104 abstract "A 91.4-m (300-ft) fracture critical cable-stayed bridge near Skagway, Alaska, carries conventional traffic and 712-kN (160,000-lb) ore trucks. The bridge has a laminated timber deck supported by transverse floor beams spanning two stiffened ASTM A588 steel box girders. Two inclined cables stay each girder near midlength to a single tower. The abutments and tower are rock-anchored to the canyon walls. The bridge was instrumented and field tested with statically positioned trucks to help determine boundary conditions provided by rock anchor supports and assess behavior for non-AASHTO ore trucks. Two types of trucks were used to load the bridge: (a) a 176.84-kN (39.74-kip) snooper truck, and (b) four different ore trucks with weights from 699.1 to 701.1 kN (155.1 to 157.6 kips). A fracture critical inspection was also conducted and cracks were found. Strain, girder deflection, a temperature profile of the girder, wind velocity, solar radiation, and ambient air temperature were monitored. Experimental deflections and strains compared with a traditional two-dimensional (2-D) analysis are presented. Maximum strains for ore truck static load tests were: 224 microstrain (276 calculated) in the box girder and 134 microstrain (193 calculated) in the tower support. Ore truck loads did not vary significantly and like loading produced excellent repeatability. For this structure, a 2-D analysis provided satisfactory results for symmetric loads; conservative answers on the loaded side for asymmetric loads. A three-dimensional analysis is suggested for modifications. Rock anchors acted as fixed supports." @default.
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- W55592104 date "1993-01-01" @default.
- W55592104 modified "2023-09-24" @default.
- W55592104 title "STATIC LIVE LOAD TESTS ON A CABLE-STAYED BRIDGE" @default.
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