ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 04 NO. 03 JULY 2015:

Title:        Development of Live Load Calibration Factor for State Highway Bridge Design of Pakistan
Authors: Sabaa Shoaib, Liaqat A. Qureshi, Muhammad Fahad
Abstract:  The most dynamic of all the loads for a bridge structure are the live loads that play a vital role in,determination of strength of the structure. Bridge is a structure that has to bear the combined effect of all the axle loads traversing it and therefore it is very necessary for the structure to be carefully designed for the heavy live loads, it is expected to be traversed in its life time. Bridge unlike pavements (designed to withstand millions of application of such axle loads) may not withstand even a single such heavier load for which it is not designed. Overloading of vehicles on state highway has been monitored and properly analyzed in this research study. The effects of vehicular live load models as dictated by “West Pakistan Code of Practice for Highway Bridges (WPCPHB)”and “American Association of State Highway and Transportation Officials (AASHTO)” have been compared with the traffic data collected and statistically analyzed from weigh-in-motion (WIM) station. The WIM station located at N-5, the largest and the most overly crowded highway of Pakistan is selected. This research has been conducted to propose the methodologies and protocols necessary for addressing the current traffic characteristics of Pakistan. Calibration factors have been proposed with both WPCPHB and AASHTO live load models to be used for the designing of highway bridges in Pakistan.
Keywords: Live Load Model, AASHTO, WPCPHB, Axle Load, Traffic, NTRC, NHA, WIM Station

pages                 165-172

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