CN103218511A - Method for determining automobile load limits according to different automobile types - Google Patents
Method for determining automobile load limits according to different automobile types Download PDFInfo
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- CN103218511A CN103218511A CN2013100784419A CN201310078441A CN103218511A CN 103218511 A CN103218511 A CN 103218511A CN 2013100784419 A CN2013100784419 A CN 2013100784419A CN 201310078441 A CN201310078441 A CN 201310078441A CN 103218511 A CN103218511 A CN 103218511A
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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
The invention belongs to bridge structure computational analysis technical field, specifically, relate to according to the different methods of determining the carload limits value of vehicle.
Background technology
The carload of harbour bridge has the characteristics of " lorry ratio height, traction engine is many, the volume of traffic is big ", less to the load distribution characteristics research of harbor district vehicle both at home and abroad at present, and existing bridge codes and standards does not propose specific requirement at the harbor district Bridge Design specially yet, cause a large amount of bridges to design according to the carload standard of common road, make the stress of bridge itself not good, disease appears in the part bridge, and is serious even collapse.Therefore be necessary the lower bridge of those design load levels is taked the limit for tonnage measure, will be limited within certain scope, prevent that its load level from exceeding the design strength of bridge, guarantee the safety of bridge through the carload on this class bridge.
The freight weight limit measure of taking at present is with a kind of standard, no matter promptly the structure of lorry itself has those differences, to a kind of other bridge of design load level, all adopt with a kind of car weight or axle is heavy is limited " the limit for tonnage value of stipulating in certain Urban Bridge limit for tonnage standard " as shown in the table to all automobiles.Yet, because the axletree quantity and the axletree deployment scenarios difference of different lorries are bigger, even the lorry of same weight is also different to the influence of bridge.In like manner, under the situation that reaches the Bridge Design load level equally, for dissimilar automobiles, it allows the general assembly (TW) and the single shaft quality and inequality of gap bridge.And adopted and the irrelevant freight weight limit standard of vehicle, to cause allowing the vehicle of passing a bridge lower, do so no doubt for guaranteeing that bridge security is more favourable, but also can cause the decline of bicycle movement capacity, under the constant condition of goods total amount, must need to use more vehicle to transport, vehicle fleet size is increased, easily form the traffic congestion at traffic bottlenecks place, reduce conevying efficiency, especially more obvious for the busy port area of freight transportation.
Therefore be necessary to establish a kind of new " carload limits value " method, can guarantee Structure Safety for Bridge, can bring into play the load-bearing capacity of bridge again to the full extent.
The limit for tonnage value of stipulating in certain Urban Bridge limit for tonnage standard of table 1
| The design load standard | Vapour-10 | Vapour-15 | Vapour-20 | Vapour-surpass 20 | City-A | City-B |
| Limit for tonnage value W (t) | 10 | 15 | 30 | 40 | 40 | 30 |
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, for this reason, the technical scheme that the present invention takes is, according to the different methods of determining the carload limits value of vehicle, step is: at first according to the automotive type situation on the bridge of harbour vehicle is classified, obtain the load situation of dissimilar vehicles then according to measured data, analyze the peak load effect that all types of automobile produced under the extreme case; Calculate different peak load effects of striding the footpath bridge under the design vehicle loading condition then, and the bridge internal force that different automobile types produces is compared with it, obtain the ratio K that difference is striden footpath bridge internal force, the maximal value of getting wherein is K
Max, utilize K
MaxInverse goes out with the automobile gross weight and the axle of design vehicle class of loading generation same effect heavy, is different automobile types load limiting value separately.
Described method further is refined as:
1) carries out the car category investigation, typical heavy-duty freight car is carried out vehicle classification according to the distribution situation of axletree quantity and axletree;
2) according to vehicle classification automobile is carried out vehicular load investigation, measure the wheelbase of various automobile simultaneously, obtain the load rated figure that automobile axle load and wheelbase are determined various automobile according to investigation;
3) the peak load effect that all types of automobile produced under the analysis extreme case;
4) calculate " under the design vehicle loading condition " difference and stride the peak load effect of footpath bridge;
5) with 3) and 4) the peak load effect calculated in two steps compares, and obtains corresponding ratio K, obtains maximal value K wherein
Max
6) according to the K that obtains
MaxThe value inverse goes out the load limiting value of various automobile.
Technical characterstic of the present invention and effect:
The load limiting value that this method obtains can guarantee Structure Safety for Bridge, can bring into play the load-bearing capacity and the effective utilization of bridge again to the full extent, avoid common limit for tonnage standard to cause the problem of the overstocked and unnecessary unloading of haulage vehicle easily, improved transport by road efficient.
Description of drawings
Four 2 type cars of Fig. 1.
Five 2 type cars of Fig. 2.
Six 1 type cars of Fig. 3.
Six 2 type cars of Fig. 4.
Four 2 type wagon loads of Fig. 5 rated figure.
Five 2 type wagon loads of Fig. 6 rated figure.
Six 1 type wagon loads of Fig. 7 rated figure.
Six 2 type wagon loads of Fig. 8 rated figure.
Embodiment
Different with the method for existing " irrelevant ", the unified limit for tonnage value of employing with vehicle, the method that the present invention relates to is: at first according to the automotive type situation on the bridge of harbour vehicle is classified, obtain the load situation of dissimilar vehicles then according to measured data, and analyze the peak load effect that all types of automobile produced under the extreme case.Calculate different peak load effects of striding the footpath bridge under the design vehicle loading condition simultaneously, the bridge internal force that different automobile types produces is compared with it, obtain the ratio K that difference is striden footpath bridge internal force, the maximal value of getting wherein is K
Max, utilize K
MaxInverse goes out with the automobile gross weight and the axle of design vehicle class of loading generation same effect heavy, is different automobile types load limiting value separately.
Embodiment:
1) carries out the car category investigation, typical heavy-duty freight car is carried out vehicle classification according to the distribution situation of axletree quantity and axletree, promptly classify by the Position Approximate of axletree number and axletree.
2) according to vehicle classification automobile is carried out vehicular load investigation, measure the wheelbase of various automobile simultaneously, obtain the load rated figure that automobile axle load and wheelbase are determined various automobile according to investigation.
In fact determining of load rated figure be exactly the comprehensive of " automobile each weight " and " distance between axles data ", and definite method is a lot, after can gathering corresponding data, averaging obtains, and can certainly obtain with additive method, specifically uses which kind of method should be according to actual needs.
3) the peak load effect that all types of automobile produced under the analysis extreme case.
4) calculate " under the design vehicle loading condition " difference and stride the peak load effect of footpath bridge.
5) with 3) and 4) the peak load effect calculated in two steps compares, and obtains corresponding ratio K, obtains maximal value K wherein
Max
6) according to the K that obtains
MaxThe value inverse goes out the load limiting value of various automobile.
Further specify the present invention below in conjunction with the drawings and specific embodiments.
1) according to the concrete condition of institute's investigation port road road network, defines representational road, and set up survey station.Carry out the car category investigation, learn that by inquiry heavy goods vehicle on this road is based on hopper car, after rejecting load less passenger vehicle and pickup truck, typical main heavy-duty freight car is classified according to the distribution situation of axletree quantity and axletree, specifically can be divided into totally four kinds of vehicles (seeing accompanying drawing 1～4) such as four 2 type cars, five 2 type cars, six 1 type cars, six 2 type cars.
2) according to vehicle classification automobile is carried out the vehicular load investigation, the axle that obtains each axletree of automobile is heavy, measure the wheelbase of various automobile simultaneously, the load rated figure (seeing accompanying drawing 5～8) that automobile axle load that obtains according to investigation and wheelbase are determined these four types of automobiles.
3) these four types of peak load effects that automobile produced under the analysis extreme case.Concrete data see the following form listed.
The maximum mid span moment (kN-m) that the various automobile of table 2 is produced
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 |
| Four 2 type automobiles | 1262.7 | 3246.3 | 5314.4 | 7711.3 | 11677.4 |
| Five 2 type automobiles | 697.0 | 1932.0 | 3650.8 | 5401.6 | 7957.4 |
| Six 1 type automobiles | 2037.0 | 5293.1 | 9388.5 | 13608.8 | 19200.1 |
| Six 2 type automobiles | 1782.6 | 4181.1 | 7192.3 | 10358.5 | 14223.7 |
The maximum reaction of supports (kN) that the various automobile of table 3 is produced
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 |
| Four 2 type automobiles | 612.1 | 719.7 | 884.8 | 1075.4 | 1233.1 |
| Five 2 type automobiles | 328.6 | 496.8 | 575.8 | 706.3 | 838.8 |
| Six 1 type automobiles | 908.6 | 1264.2 | 1426.6 | 1771.1 | 2068.6 |
| Six 2 type automobiles | 768.9 | 977.3 | 1075.0 | 1332.5 | 1550.2 |
4) calculate different peak load effects of striding the footpath bridge under design vehicle load (highway-I level) condition.Concrete data see the following form listed.
The maximum mid span moment (kN-m) that table 4 design vehicle load is produced
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 |
| Highway-I level load standard | 631.3 | 1725.0 | 3281.3 | 5300.0 | 7781.3 |
The maximum reaction of supports (kN) that table 5 design vehicle load is produced
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 |
| Highway-I level load standard | 292.5 | 393.0 | 493.5 | 594.0 | 694.5 |
5) with 3) and 4) peak load effect in two steps compares, and obtains corresponding ratio K, obtains maximal value K wherein
MaxConcrete data see the following form listed.
The maximum mid span moment effect of table 6 ratio K
| Stride the footpath | 10 | 20 | 30 | 40 | 50 | Maximal value |
| Four 2 types | 2.00 | 1.88 | 1.62 | 1.45 | 1.50 | 2.00 |
| Five 2 types | 1.10 | 1.12 | 1.11 | 1.02 | 1.02 | 1.12 |
| Six 1 types | 3.23 | 3.07 | 2.86 | 2.57 | 2.47 | 3.23 |
| Six 2 types | 2.82 | 2.42 | 2.19 | 1.95 | 1.83 | 2.82 |
The maximum reaction of supports effect of table 7 ratio K
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 | Maximal value |
| Four 2 types | 2.09 | 1.83 | 1.79 | 1.81 | 1.78 | 2.09 |
| Five 2 types | 1.12 | 1.26 | 1.17 | 1.19 | 1.21 | 1.26 |
| Six 1 types | 3.11 | 3.22 | 2.89 | 2.98 | 2.98 | 3.22 |
| Six 2 types | 2.63 | 2.49 | 2.18 | 2.24 | 2.23 | 2.63 |
Table 8 maximal value K
MaxResult of calculation
6) according to the K that obtains
MaxThe value inverse goes out the load limiting value of these four types of automobiles.Concrete data see the following form listed.
Load limiting value (the unit: t) of table 9 different automobile types
It will be appreciated by those skilled in the art that accompanying drawing is the synoptic diagram of a preferred embodiment, the invention described above embodiment sequence number is not represented the quality of embodiment just to description.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. one kind according to the different methods of determining the carload limits values of vehicle, it is characterized in that, step is: at first according to the automotive type situation on the bridge of harbour vehicle is classified, obtain the load situation of dissimilar vehicles then according to measured data, analyze the peak load effect that all types of automobile produced under the extreme case; Calculate different peak load effects of striding the footpath bridge under the design vehicle loading condition then, and the bridge internal force that different automobile types produces is compared with it, obtain the ratio K that difference is striden footpath bridge internal force, the maximal value of getting wherein is K
Max, utilize K
MaxInverse goes out with the automobile gross weight and the axle of design vehicle class of loading generation same effect heavy, is different automobile types load limiting value separately.
2. as claimed in claim 1 according to the different methods of determining the carload limits value of vehicle, it is characterized in that described method further is refined as:
1) carries out the car category investigation, typical heavy-duty freight car is carried out vehicle classification according to the distribution situation of axletree quantity and axletree;
2) according to vehicle classification automobile is carried out vehicular load investigation, measure the wheelbase of various automobile simultaneously, obtain the load rated figure that automobile axle load and wheelbase are determined various automobile according to investigation;
3) the peak load effect that all types of automobile produced under the analysis extreme case;
4) calculate " under the design vehicle loading condition " difference and stride the peak load effect of footpath bridge;
5) with 3) and 4) the peak load effect calculated in two steps compares, and obtains corresponding ratio K, obtains maximal value K wherein
Max
6) according to the K that obtains
MaxThe value inverse goes out the load limiting value of various automobile.
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| CN2013100784419A CN103218511A (en) | 2013-03-12 | 2013-03-12 | Method for determining automobile load limits according to different automobile types |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833519A (en) * | 2014-12-22 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle axle load determining method and device |
| CN107273605A (en) * | 2017-06-12 | 2017-10-20 | 扬州大学 | Actual measurement axle load spectrum based on multiple classification device system determines method |
| CN114417468A (en) * | 2022-01-11 | 2022-04-29 | 哈尔滨工业大学 | Intelligent automobile load limiting method for sub-health highway bridge |
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| US20060110220A1 (en) * | 2004-11-19 | 2006-05-25 | Edward Cable | Irregularly surfaced h pile |
| CN101615341A (en) * | 2009-07-17 | 2009-12-30 | 重庆交通大学 | A kind of bridge intelligent control method based on traffic flow control |
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2013
- 2013-03-12 CN CN2013100784419A patent/CN103218511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060110220A1 (en) * | 2004-11-19 | 2006-05-25 | Edward Cable | Irregularly surfaced h pile |
| CN101615341A (en) * | 2009-07-17 | 2009-12-30 | 重庆交通大学 | A kind of bridge intelligent control method based on traffic flow control |
Non-Patent Citations (1)
| Title |
|---|
| 徐凯: "现行公路桥梁设计汽车荷载适应性研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, no. 3, 15 March 2011 (2011-03-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833519A (en) * | 2014-12-22 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle axle load determining method and device |
| CN107273605A (en) * | 2017-06-12 | 2017-10-20 | 扬州大学 | Actual measurement axle load spectrum based on multiple classification device system determines method |
| CN107273605B (en) * | 2017-06-12 | 2020-05-22 | 扬州大学 | Actually measured axle load spectrum determination method based on multiple classifier system |
| CN114417468A (en) * | 2022-01-11 | 2022-04-29 | 哈尔滨工业大学 | Intelligent automobile load limiting method for sub-health highway bridge |
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Application publication date: 20130724 |