Overload Safety Assessment And Management Of Roads And Bridges

This paper includes two parts. The first one introduces the safety assess of bridges on the heavy vehicle loading roads; the second one studies the overloading bridge management .For the safety assess of bridges on the heavy Vehicle loading roads, the serious condition of overloading and heavy trucks on the Fu-Dian highway was investigated. On the base of investigation, function relation between utmost load and overloading is deduced hi this paper. On the base of probability and mathematical statistics ,gross weight and axle-load histograms are drawn out, and various assessment load models are studied and confirmed. Typical bridges are reinforced and checked calculations for analyzing the reinforcing results, and that, load effect, intension and distortion of brigdes are checked and analyzed. At last, the paper puts forward the ideas of limiting load and disparting-driveway to control transportation, and suggests the standard of limiting load. For the management of heavy trucks crossing bridges, the paper sets up the information database, and utilizes visual language vfor6.0 to develop and design the information management system. For the evaluation of existing bridges for heavy trucks or overloading , fuzzy mathematics theorem is used to evaluate the conditions of the bridges quality .The paper also puts forward the fuzzy comprehensive evaluation method for checking parameters Z1 of carrying capacity of existing bridges ,and the method is tested by an example.