CN103207932A - Method for determining automobile wheelbases to conduct load analysis - Google Patents
Method for determining automobile wheelbases to conduct load analysis Download PDFInfo
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Abstract
本发明属于桥梁结构计算分析技术领域，为使确定的轴距值可以更好地与实际运行的汽车情况相吻合，也更加科学，对于研究汽车荷载对桥梁的影响方面可以提供更加准确的轴距数据，为此，本发明采取的技术方案是，确定汽车车辆轴距以进行桥梁汽车荷载分析的方法，步骤是，首先对要研究的桥梁上通行汽车的类型进行调查，根据车型分类及其对桥梁的影响程度确定需要分析的车型；然后根据车型进行汽车轴距的数据调查，然后将轴距作为随机变量考虑；然后通过调查得到汽车轴重，再根据轴距和相应轴重得到汽车车辆的“荷载计算图式”，并进行桥梁汽车荷载分析。本发明主要应用于桥梁结构计算分析。
The invention belongs to the technical field of calculation and analysis of bridge structures. In order to make the determined wheelbase value better coincide with the actual operation of the car, it is more scientific and can provide a more accurate wheelbase for studying the influence of car loads on bridges. data, for this reason, the technical solution that the present invention takes is, determine the method for vehicle vehicle wheelbase to carry out bridge vehicle load analysis, step is, at first the type of traffic vehicle on the bridge to be studied is investigated, according to vehicle type classification and its corresponding The degree of influence of the bridge determines the vehicle type to be analyzed; then conducts a vehicle wheelbase data investigation according to the vehicle type, and then considers the wheelbase as a random variable; then obtains the vehicle axle load through the investigation, and then obtains the vehicle vehicle weight according to the wheelbase and corresponding axle load "Load Calculation Schema", and carry out bridge vehicle load analysis. The invention is mainly applied to the calculation and analysis of bridge structures.
Description
Technical field
The invention belongs to bridge structure computational analysis technical field, specifically, relate to and determine that the automobile wheelbase is to carry out the method that the bridge carload is analyzed.
Background technology
In the carload research of bridge, often pay attention to the research of automobile " axle is heavy ", and not enough to automobile " wheelbase " research.Wheelbase is one and is related to the important parameter that carload distributes, and has certain influence for the computational accuracy of the whole load effect of automobile, vehicle wheel base really normal root according to the study with the needs of using, mainly at present adopt three kinds of modes:
1) to being used for the loading experiment of minority, specific vehicle, adopt the method for actual measurement, that is: each car is all carried out actual measurement, obtain the wheelbase of each car, because the automobile quantity of using in the actual experiment seldom, only have several, in this case, this method has higher precision and practicality.
2) investigation automobile production producer directly adopts its wheelbase.
3) with reference to former relevant regulations.In China's related specifications vehicle wheel base there are some regulations, stipulate as shown in Figure 1 such as the wheelbase to five standard cars of 550kN in " highway technical standard " (JTG B01-2003) and " highway bridge and culvert design general specification " (JTG D60-2004).This method is fairly simple quick, calculates effectively for the checking of local member of bridge structure.
It is less that first kind of mode is only applicable to vehicle, and determine the situation of used concrete automobile; The second way, fairly simple direct, can't investigate but can the product of particular automobile producer represent the automobile of actual motion preferably, be a unknown number, so its load computational accuracy can't guarantee; The third mode since in the standard car category stipulated not necessarily identical with the car category of actual gap bridge, even type is identical, its wheelbase also has certain difference, so there are certain defective in the representative vehicle of its calculating and dirigibility method.
In sum, in the carload research of bridge, if accurately analyze the load effect of automobile to bridge that pass through on the bridge, when accurately measuring automobile axle load, also should determine the wheelbase of automobile preferably, make the wheelbase that uses in the load analytic process have more representativeness and accuracy, and present wheelbase determine that method all has certain limitation.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, definite wheelbase value can be better matched with the automobile situation of actual motion, also science more, for research carload influencing the aspect wheelbase data more accurately can be provided bridge, for this reason, the technical scheme that the present invention takes is, determine that the automobile wheelbase is to carry out the method that the bridge carload is analyzed, step is, at first the type of current automobile on the bridge that will study is investigated, determine the vehicle that needs are analyzed according to vehicle classification and to the influence degree of bridge, do not limit a kind of vehicle; Carry out the data survey of vehicle wheel base then according to vehicle, then wheelbase is considered as stochastic variable that each wheelbase data is a random variable and carries out data analysis, utilized wheelbase frequency histogram to determine its mode, i.e. " most probable value ", with this as the wheelbase typical value; Obtain automobile axle load then by inquiry, arrive " the load rated figure " of automobile according to wheelbase and corresponding axis recuperation again, and carry out the analysis of bridge carload.
Described method further is specially:
1) carries out car category investigation, according to vehicle automobile is classified, and wherein need to determine the vehicle analyzed;
2) selected vehicle is carried out the wheelbase investigation, investigation quantity will be as much as possible, and data are more many, and representativeness is more strong;
3) the wheelbase data are concluded, drawn wheelbase frequency histogram;
4) selection mode wherein is as the wheelbase value;
5) carry out the load investigation, it is heavy to obtain corresponding axle;
6) with the axle heavy phase of wheelbase and automobile in conjunction with " the load rated figure " that obtain automobile;
7) bridge is carried out the analysis of automobile load.
Technical characterstic of the present invention and effect:
The wheelbase value of determining with this method can be better matches with the automobile situation of actual motion, also science more, for the research carload to the influencing the aspect wheelbase data more accurately can be provided of bridge, thereby obtain bridge carload effect analysis result more accurately.
Description of drawings
In Fig. 1 China standard to the regulation synoptic diagram of five standard cars.
Three type lorries that Fig. 2 selectes.
The frequency histogram of wheelbase between Fig. 3 front axle and second.
The frequency histogram of wheelbase between second of Fig. 4 and the rear axle.
The load rated figure of Fig. 5 automobile.
Embodiment
Different with existing method, the method that the present invention relates to is at first investigated the type of current automobile on the bridge that will study, determine the vehicle (not limitting a kind of vehicle) that needs are analyzed according to vehicle classification and to the influence degree of bridge, carry out the data survey of vehicle wheel base then according to vehicle, then wheelbase is considered as stochastic variable, each wheelbase data is a random variable and carries out data analysis, utilize wheelbase frequency histogram to determine its mode (i.e. " most probable value "), with this as the wheelbase typical value; Carry out the axle readjustment then and look into, obtain automobile axle load; Again according to wheelbase and axle tuple according to draw out the automobile load rated figure of definite vehicle, and carry out the analysis of bridge carload.
Embodiment:
The wheelbase value of determining with this method can be better matches with the automobile situation of actual motion, and also science more is for research carload influencing the aspect wheelbase data more accurately can be provided bridge.
Further describe the present invention below in conjunction with the drawings and specific embodiments.
1) according to the bridge position that will study, sets up survey station in conjunction with the road network situation.Carry out car category investigation, learn that heavy goods vehicle on this road based on the building materials haulage vehicle, after rejecting load less passenger vehicle and pickup truck, is research object with three type lorries.Be characterized in that front axle is single shaft-single-wheel, rear axle is the duplex axle, as accompanying drawing 2.
2) three selected type lorries are carried out the wheelbase investigation, enquiry data gathers and sees the following form.
Wheelbase table between table 1 front axle and second
Wheelbase between second in table 2 and the rear axle
3) the wheelbase data are carried out induction-arrangement, draw out wheelbase frequency histogram according to the number of times that wheelbase occurs, as shown in Figure 3, Figure 4.
4) mode of chosen axis in the frequency histogram is as the wheelbase value.Concrete numerical value sees the following form.
The wheelbase table of three type automobiles of table 3
| The wheelbase position | Wheelbase value (m) |
| Front axle and second | 3.5 |
| Second and rear axle | 1.35 |
5) carry out the load investigation, it is heavy to obtain corresponding axle.Concrete numerical value sees the following form.
The axle of the various automobile of table 4 is table heavily
| The axletree position | Axle heavy (t) |
| First | 8.86 |
| Second | 19.83 |
| The 3rd | 19.58 |
6) with the axle heavy phase of wheelbase and automobile in conjunction with the load rated figure that obtains automobile.
The carload rated figure is each relative position relation and the heavy a kind of load synoptic diagram of respective shaft of expression automobile, is used for using when Structure Calculation is analyzed, and can draw according to corresponding data under wheelbase and the heavy situation about having determined of axle.The load rated figure of " three type lorries " as shown in Figure 5 in the present embodiment.
7) bridge is carried out the analysis of automobile load.
Can specify the position of automobile to carry out the bridge automobile and load and analyze, also can obtain the line that influences of the bridge internal force be concerned about, load calculating influencing line then, obtain corresponding internal force.
And these load analyses namely can hand computation, also can utilize the existing structure analysis software to calculate.
Can utilize existing instrument or method in a word, select for use according to actual needs, the bridge structure of needs analysis is carried out the load analysis, have no particular limits and requirement.
Be 10～50m integer to be striden simply supported girder bridge directly analyze in the present embodiment, obtain corresponding mid span moment and the reaction of supports, shown in concrete result of calculation sees the following form.
Table 5 difference is striden the mid span moment under the simply supported girder bridge vehicular load of footpath
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 |
| Mid span moment (kNm) | 899.5 | 2082.8 | 3266.1 | 4449.5 | 5632.8 |
Table 6 difference is striden the reaction of supports under the simply supported girder bridge vehicular load of footpath
| Stride footpath (m) | 10 | 20 | 30 | 40 | 50 |
| The reaction of supports (kN) | 404.9 | 439.1 | 450.5 | 456.2 | 459.7 |
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 does not represent the quality of embodiment just to description.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885551A (en) * | 2017-02-20 | 2017-06-23 | 广西交通科学研究院有限公司 | Based on bridge dynamic strain identification one bicycle axle away from method |
| CN110853164A (en) * | 2019-11-12 | 2020-02-28 | 广州大学 | Tolling method, system, medium and charging equipment based on road network damage |
| CN113029625A (en) * | 2021-03-11 | 2021-06-25 | 苏交科集团股份有限公司 | Bridge load test axle load distribution device and method thereof |
| CN114462114A (en) * | 2020-11-10 | 2022-05-10 | 北京机械设备研究所 | Multi-axle vehicle bridge trafficability judgment method and system based on fitting formula |
| CN114462114B (en) * | 2020-11-10 | 2025-04-15 | 北京机械设备研究所 | A method and system for judging the passability of multi-axle vehicle bridges based on fitting formula |
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2013
- 2013-03-12 CN CN2013100798553A patent/CN103207932A/en active Pending
Patent Citations (3)
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| JPH11259543A (en) * | 1998-03-09 | 1999-09-24 | Fujitsu Fip Corp | Structural analysis system and recording medium recording structural analysis program |
| US20100100361A1 (en) * | 2007-02-28 | 2010-04-22 | Keio University | Numerical structure-analysis calculation system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885551A (en) * | 2017-02-20 | 2017-06-23 | 广西交通科学研究院有限公司 | Based on bridge dynamic strain identification one bicycle axle away from method |
| CN110853164A (en) * | 2019-11-12 | 2020-02-28 | 广州大学 | Tolling method, system, medium and charging equipment based on road network damage |
| CN110853164B (en) * | 2019-11-12 | 2021-11-30 | 广州大学 | Road network damage-based traffic charging method, system, medium and charging equipment |
| CN114462114A (en) * | 2020-11-10 | 2022-05-10 | 北京机械设备研究所 | Multi-axle vehicle bridge trafficability judgment method and system based on fitting formula |
| CN114462114B (en) * | 2020-11-10 | 2025-04-15 | 北京机械设备研究所 | A method and system for judging the passability of multi-axle vehicle bridges based on fitting formula |
| CN113029625A (en) * | 2021-03-11 | 2021-06-25 | 苏交科集团股份有限公司 | Bridge load test axle load distribution device and method thereof |
| CN113029625B (en) * | 2021-03-11 | 2023-11-21 | 苏交科集团股份有限公司 | Bridge load test axle load distribution device and method thereof |
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Application publication date: 20130717 |