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- Title
Some observations on BWIM data collected in Manitoba.
- Authors
Algohi, B.; Bakht, B.; Khalid, H.; Mufti, A.; Regehr, J.
- Abstract
Three highway bridges in the Canadian province of Manitoba are being monitored continuously not only for their long-term performance but also for bridge weighing-in-motion (BWIM). Data collected for the BWIM study has led to some observations that have far-reaching consequences about the design and evaluation loads for highway bridges. This paper presents the well-known concept of equivalent base length, Bm, as a useful tool for comparing trucks with different axle weight and spacing configurations as they influence load effects in all bridges. It is discussed that the statistics of gross vehicle weights (GVWs), W, collected over a one-month period is not significantly different from that for the GVW data collected over a longer period. A rational method concludes that the value of W for the CL-W Truck, the design live load specified by the Canadian Highway Bridge Design Code, is 555 kN for Manitoba. The observed truck data in Manitoba presented on the W–Bm space is found to be similar to that collected in the Canadian province of Ontario more than four decades ago. It was also found that the multi-presence factors, accounting for the presence of side-by-side trucks in two-lane bridges, specified in North American bridge design and evaluation codes are somewhat conservative.
- Subjects
MANITOBA; ONTARIO; BRIDGES; ROAD construction; CONFIGURATION space; LIVE loads; CANADIAN provinces; TRUCKS; LOAD forecasting (Electric power systems)
- Publication
Canadian Journal of Civil Engineering, 2020, Vol 47, Issue 1, p88
- ISSN
0315-1468
- Publication type
Article
- DOI
10.1139/cjce-2018-0389