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原文传递 Investigation of the Impact of Dual-Lane Axle Spacing on Lateral Load Distribution.

题名：	Investigation of the Impact of Dual-Lane Axle Spacing on Lateral Load Distribution.
作者：	Deng, Y.; Phares, B. M.
关键词：	Dual lanes, Load distribution, Lateral distribution, Wheel line spacing, dual loads, Bridges, Finite element (FE), Overweight vehicles, LRFD(Load and Resistant Factor Design), AASHTO(American Assocation of State Highway Transportation Officials)
摘要：	With ever-increasing numbers and sizes of permitted vehicles and loads crossing Iowa’s highways and bridges, it has become more and more common for oversized, overweight vehicles to travel on at least four wheel lines that are evenly or unevenly spaced. The spacing of the adjacent wheel lines of dual-lane loads induces different lateral live load distributions on bridges, which cannot be determined using the current American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) or Load Factor Design (LFD) equations, which are only applicable for vehicles with standard axle configurations. Current Iowa law requires dual-lane loads to meet a five-foot requirement (i.e., interior wheel-line spacing no less than five feet) or the maximum weight of each axle cannot exceed 20,000 pounds (20 kips). It is necessary to understand the actual effects of wheel-line spacing on lateral load distribution, such that the five-foot requirement of the Iowa Department of Transportation (DOT) policy can be justified or improved and the applicability of the AASHTO LRFD or LFD equations to dual-lane loads can be determined. The main objective of this research was to investigate the impact of the wheel-line spacing of dual-lane loads on the lateral load distribution on bridges. To achieve this objective, a numerical evaluation using finite element (FE) models was performed.
总页数：	Deng, Y.; Phares, B. M.
报告类型：	科技报告