Simulation, grading and compilation method of over-limit load spectrum of two-dimensional vehicle
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A vehicle load and load spectrum technology, applied in the field of vehicle load spectrum, can solve the problems of not considering changes, unseen, unseen vehicle overload load spectrum, etc., and achieve the effect of reducing the experimental workload
Active Publication Date: 2020-07-28
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0005] To sum up, there are the following problems in the simulation, classification and preparation of (overrun) vehicle load spectra in my country at present: the current vehicle load spectra are all one-dimensional load spectra (load-time series), that is, only considering the vehicle load Time variation law without considering its variation with space (lane); no report on vehicle overrun load spectrum; no simulation, grading and compilation method of vehicle overrun load spectrum; no report on two-dimensional vehicle load spectrum ; There is no method for the simulation, classification and preparation of two-dimensional vehicle overload spectrum
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Embodiment 1
[0060] Such as figure 1 Shown is a flow chart of a method for simulating, grading and preparing a two-dimensional vehicle overload spectrum, the method comprising steps:
[0061] (1) Continuously collect traffic flow information for a period of time on various typical roads;
[0062] Typical roads include national highways, urban expressways, expressways and other roads;
[0063] Collection methods include the use of vehicle dynamic weighing systems, capture systems, or manual counting;
[0064] Traffic flow information includes license plate number, passing time, lane, vehicle type (number of axles), axle weight, total weight, vehicle speed, etc.
[0065] The continuous collection time of traffic flow information is more than one month.
[0066] (2) Generate the traffic flow sequence and determine the optimal sample size of the traffic flow;
[0067] There are two methods for generating traffic sequences, namely:
[0068] According to the "Technical Standards for Highway...
Embodiment 2
[0108] Below in conjunction with example the simulation and classification and preparation method of this two-dimensional overrunning vehicle load spectrum are further introduced, and described method comprises steps:
[0109] (1) An express (high-speed) road and bridge in a certain city has three lanes in a single frame. The vehicle dynamic weighing system and the capture system are used comprehensively to continuously collect traffic flow data for one month. The data for 24 days is as follows: image 3 shown.
[0110] (2) According to "Road Vehicle Outline Dimensions, Axle Load and Quality Limits" (GB1589-2004) and "China Automobile Model Manual (2012)", calculate the load effect of vehicles with each axle number respectively, and refer to the spot check results on site , taking the vehicles with the same number of axles as a class, and taking the vehicle with the largest load effect among various types of vehicles as the respective calculation (standard) models, such as F...
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Abstract
The invention discloses a simulation, grading and compilation method of a over-limit load spectrum of a two-dimensional vehicle. The method comprises the following steps: continuously collecting traffic flow information of various typical roads for a period of time; generating a traffic flow sequence of each lane, and determining the optimal sample capacity of the traffic flow; analyzing the probability characteristics of the traffic flow sequence of each lane; simulating traffic flow sequences of all lanes; generating a two-dimensional over-limit vehicle load spectrum; grading the two-dimensional over-limit vehicle load spectrum; and compiling the two-dimensional over-limit vehicle load spectrum. The method provided by the invention is adopted to simulate, grade and compile the vehicle over-limit load spectrum; the effects of reproducing actual situations such as overrun, overload and the like in road / highway transportation in China, facilitating load effect, bearing capacity and safety evaluation of a bridge structure, health monitoring, amplitude variation and random fatigue experiments, life prediction, graded management and maintenance of highways / roads and bridges, safety risk control and the like can be achieved.
Description
technical field [0001] The invention relates to the technical field of vehicle load spectrum, in particular to a method for simulating, grading and compiling two-dimensional vehicle overrun load spectrum. Background technique [0002] In my country's road (highway) transportation, overrunning / overloading of vehicles is a common phenomenon. While not all overruns / overloads cause the bridge structure to bear excessively large loads (referred to as "overloads") that are greater than the design load, overruns / overloads often result in overloads that can cause premature damage to the bridge structure and various diseases, and even endanger the structure and traffic safety. In order to ensure the safety of existing highway bridge structures and provide a theoretical basis for the improvement of highway bridge design standards, it is necessary to accurately simulate and compile the actual vehicle load spectrum (including overrun loads) of typical highways in my country. [0003] ...
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