Method for determining automobile load limits according to different automobile types

Abstract

The invention belongs to the technical field of computational analysis of bridge structures, and provides a method for determining automobile load limits to ensure the safety of a bridge structure and exert the bearing capacity of a bridge maximally. The method for determining the automobile load limits according to different automobile types comprises the following steps of firstly classifying automobiles on a port bridge according to the condition of automobile types; then obtaining load conditions of differenttypes ofautomobiles according to measured data, and analyzing the maximum load effect generated by each type of automobile under extreme condition; and calculating the maximum load effect of different-span bridges under the designed automobile load condition, comparingbridge internal forces generated by the different types ofautomobileswith the maximum load to obtain ratios K of the internal forces of thedifferent-span bridges, taking the maximumas Kmax, and back calculating the load limits of thedifferent automobile types by utilizing the Kmax. The method is mainly applied to the computational analysis of the bridge structures.

Description

technical field [0001] The invention belongs to the technical field of calculation and analysis of bridge structures, and in particular relates to a method for determining a vehicle load limit value according to different vehicle types. Background technique [0002] The vehicle load of port bridges has the characteristics of "high proportion of trucks, many heavy-duty vehicles, and large traffic volume". Specific requirements were put forward in the design of bridges in the district, resulting in a large number of bridges being designed according to the vehicle load standards of ordinary roads, resulting in poor stress status of the bridges themselves, and some bridges were diseased, and even collapsed in serious cases. Therefore, it is necessary to take load-limiting measures for those bridges with low design load levels, to limit the load of vehicles passing through such bridges within a certain range, to prevent the load level from exceeding the design strength of the bri...

AI Technical Summary

Problems solved by technology

However, the adoption of a weight limit standard that has nothing to do with the type of vehicle will result in a lower number of vehicles allowed to cross the bridge. This is of course beneficial to ensuring the safety of the bridge, but it will also cause a decline in the transportation capacity of single vehicles. , it is necessary to use more vehicles for transportation, which will increase the number of vehicles, easily form traffic congestion at traffic bottlenecks, and reduce transportation efficiency, especially for port areas with heavy cargo transportation.

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