scholarly journals The influence of position of the post or its absence on the performance of the cable barrier system

2018 ◽  
Vol 219 ◽  
pp. 02012
Author(s):  
Dawid Bruski ◽  
Stanisław Burzyński ◽  
Jacek Chróścielewski ◽  
Łukasz Pachocki ◽  
Krzysztof Wilde ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Road Safety ◽  
Numerical Study ◽  
Full Scale ◽  
The Road ◽  
Safety Barriers ◽  
Study Results ◽  
Crash Tests

Road safety barriers are used to increase safety in potentially dangerous places on the roads. They are designed and installed on the roads to prevent any vehicle from getting outside the travelled way or from entering the opposite lane of the road. Barriers, which are used on European roads, have to undergo full scale crash tests according to the EN 1317 standards. Nowadays as a supplement to real crash tests, numerical simulations are commonly used. The work concerns the influence of position of the post or its absence on the crashworthiness of the cable barrier based on numerical study results.

Numerical Analysis of TB32 Crash Tests for 4-cable Guardrail Barrier System Installed on the Horizontal Convex Curves of Road

2020 ◽  
Vol 21 (1) ◽  
pp. 65-81 ◽  
Author(s):  
Krzysztof Wilde ◽  
Dawid Bruski ◽  
Marcin Budzyński ◽  
Stanisław Burzyński ◽  
Jacek Chróścielewski ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Numerical Simulations ◽  
Road Safety ◽  
Road Accidents ◽  
Road Infrastructure ◽  
The Road ◽  
Horizontal Curves ◽  
Convex Curves ◽  
Safety Barriers ◽  
Crash Tests

AbstractHorizontal curves are one of the elements of road infrastructure where statistically a relatively high number of accidents have been reported. In the last 10 years in Poland, approximately 10% of all road accidents happened on horizontal curves of roads and was responsible for approximately 14% of all fatalities on Polish roads. Thus, this issue is important and requires extensive research and proper road safety treatments. One possible measure that may contribute to improvement of safety on road curves may be barriers. The purpose of this work is to assess, with use of numerical simulations, the performance of the 4-cable barrier systems installed on horizontal road convex curves. The most important parameters for road safety barriers are presented including the effect of various impact velocities and the radiuses of the road curves.

scholarly journals On the validation of the LS-DYNA Geo Metro numerical model

2019 ◽  
Vol 262 ◽  
pp. 10001 ◽  
Author(s):  
Dawid Bruski ◽  
Stanisław Burzyński ◽  
Jacek Chróścielewski ◽  
Łukasz Pachocki ◽  
Wojciech Witkowski
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Road Safety ◽  
Finite Element Code ◽  
Numerical Tests ◽  
Safety Barriers ◽  
The Subject ◽  
Crash Tests

The paper presents experiences gained during work with numerical model of Geo Metro vehicle used for simulations of crash tests with road safety barriers. Attention is drawn to the subject of tire/wheel breakage during collision events. Some methods for improvement of the model are presented in the paper. Several results for the normative vehicle numerical tests are introduced. Simulations were carried out using LS-DYNA finite element code with solver version R8.1.

scholarly journals Modelling and Simulation of Crash Tests on Curved Barriers Taking into Account Vehicle Speed Limits

2019 ◽  
Vol 14 (3) ◽  
pp. 304-325
Author(s):  
Marian Klasztorny ◽  
Daniel Bronislaw Nycz ◽  
Kamil Pawel Zajac
Keyword(s):  
Numerical Modelling ◽  
Traffic Safety ◽  
Road Safety ◽  
Road Traffic ◽  
Modelling And Simulation ◽  
Small Radius ◽  
Vehicle Speed ◽  
Road Traffic Safety ◽  
Safety Barriers ◽  
Crash Tests

The reliable speed of a vehicle, assigned to a given road arc, is not usually taken into account in simulation of crash tests on road safety barriers located on horizontal concave arcs with small radii (20−200 m). In this work, the numerical modelling and simulations of TB11, TB32 crash tests for selected road safety barriers on a horizontal concave arc with a small radius of 150 m, at a reliable and increased speed of a vehicle, were conducted. The authors developed the methodology of numerical modelling and simulation and published in the period 2015−2018. In this study, crash tests include two N2 class steel road barriers with the B-type guide rail, i.e. SP-05/1 (with 1.00 m post spacing) and SP-05/2 (with 2.00 m post spacing). Suzuki Swift and Dodge Neon vehicle models were taken from the National Crash Analysis Center (USA) library and modified, respectively. It was proved that road traffic safety on horizontal concave arcs with small radii is assured if the reliable velocity is not exceeded by drivers. Compacting the post spacing or the uses of a composite-foam protective overlay added to guide rails are not recommended.

scholarly journals Assessing vehicle restraint systems on horizontal curves

2018 ◽  
Vol 231 ◽  
pp. 01004
Author(s):  
Marcin Budzyński ◽  
Dawid Bruski
Keyword(s):  
Road Safety ◽  
Numerical Test ◽  
Full Scale ◽  
Test Results ◽  
Road Accidents ◽  
Safety Equipment ◽  
Horizontal Curves ◽  
Numerical Tests ◽  
The Right ◽  
Crash Tests

Horizontal curves, an element of road infrastructure, have a statistically high number of accidents. Considering that horizontal curves in the last ten years have had app. 10% of all road accidents representing app. 14% of all fatalities on Polish roads, the issue is serious and requires more research and proper road safety treatments. Data for 2007 - 2016 show that in the case of accidents on horizontal curves app. 45% of the fatalities happened as a result of crashing into roadside obstacles such as signs and first of all trees. This shows that horizontal curves require road safety equipment, and specifically, safety barriers. Key to this is using the right equipment and the right parameters. To achieve that, full-scale crash tests should be conducted to be followed by numerical tests. The article will present a synthesis of the available research conducted in Poland and abroad. An assessment will be made of four crash tests of TB32 with barriers that have a steel and cable guardrail. They are the outcome of the RID 3A “Road safety equipment” project called RoSE. Building on these tests, numerical test results will be presented.

Simulation of crash tests for high containment levels of road safety barriers

2007 ◽  
Vol 14 (8) ◽  
pp. 1711-1718 ◽  
Author(s):  
M. Borovinšek ◽  
M. Vesenjak ◽  
M. Ulbin ◽  
Z. Ren
Keyword(s):  
Road Safety ◽  
Safety Barriers ◽  
Crash Tests

Experimental Methods for Road Tankers: A Critical Review

2020 ◽  
Author(s):  
Frank Otremba ◽  
José A. Romero Navarrete ◽  
Alejandro A. Lozano Guzmán
Keyword(s):  
Critical Review ◽  
Road Safety ◽  
Experimental Methods ◽  
Potential Effect ◽  
Full Scale ◽  
Field Conditions ◽  
The Road ◽  
Experimental Approaches ◽  
On The Road ◽  
High Center

Abstract The transportation of liquids involves several situations derived from the curved shape of the cargo containers, including a comparatively high center of gravity, which negatively shifts when the container is partially loaded, and the vehicle is subjected to steering or braking accelerations. Aiming at reducing these effects several experimental approaches have been applied, involving different tank shapes and the use of baffles, tested under laboratory or field conditions, at full scale or at a down-scale. However, the scope of such approaches has been limited, mainly because the potential effect of other components of the vehicle on the road tanker behavior, has been neglected. In this paper, a critical review is presented of the experimental approaches considered so far, identifying specific experimental needs to improve the performance of the vehicles, from both the road safety and the environmental perspective.

ASPECTS OF SAFE AND SECURE TRUCK PARKING AREAS DEVELOPMENT IN EUROPE AND THEIR IMPACT ON ROAD SAFETY AND FOLLOVING THE SOCIAL CONDITIONS

2020 ◽  
Vol 264 (4) ◽  
pp. 27-33
Author(s):  
Olga Sabanska ◽  
Keyword(s):  
Road Safety ◽  
Well Being ◽  
Road Transport ◽  
Rating System ◽  
Transport Sector ◽  
Final Report ◽  
Association Agreement ◽  
The Road ◽  
Study Results ◽  
The Eu

The current situation is considered on the development of safe and secure parking areas for trucks in Europe. The reports of the International Road Transport Union were analyzed on the European Union-funded project on Safe and secure truck parking areas for trucks in Europe and a final report on the study of safe and secure places for truck parking in the EU. The analysis of European regulations is carried out on road infrastructure safety management, specification of truck parking zones, rules of working time and rest of the driver, as well as Ukrainian legislation on these issues. With a view to provide a consistent definition of secure truck parking areas and a quality framework, an EU-wide rating system and security and service at SSTPAs has been defined during the study that included participation by all key stakeholders within the road transport and logistics sector. This rating system should now be implemented as a standard by a newly created EU expert group. The quality of the entire system and of the individual secure truck parking areas shall be guaranteed by ensuring that independent third party audits will occur for all secure truck parking areas within the system. In the future this quality system could also link to ITS solutions for the road transport sector. The implementing the study results in both existing truck parking areas and in new truck parking areas and thereby increasing the number of available secure parking areas throughout Europe, there is a strong probability that cargo crime and incident rates will be reduced significantly and that the security and well-being of truck drivers will be improved, thereby benefitting road safety as well. Recommendations for possible measures to improve the legislation of Ukraine are provided in terms of establishing the SSTPA in view of the EU-Ukraine Association Agreement provisions. Keywords: road safety, freight road transport, Safe and secure truck parking areas (SSTPA), EU Mobility package, driving and rest time rules of driver, Ukraine – EU Association Agreement.

A geosynthetic reinforcement solution to prevent the formation of localized sinkholes

2000 ◽  
Vol 37 (5) ◽  
pp. 987-999 ◽  
Author(s):  
P Villard ◽  
J P Gourc ◽  
H Giraud
Keyword(s):  
Surface Deformation ◽  
Numerical Study ◽  
Three Dimensional ◽  
Full Scale ◽  
Geosynthetic Reinforcement ◽  
The Road ◽  
Railway Line ◽  
Collapse Mechanisms ◽  
Full Scale Tests ◽  
Three Dimensional Finite Element

To prevent the appearance of localized sinkholes under roads and railway lines in areas at risk, a research program testing a geosynthetic reinforcement solution was carried out by a group of laboratories. The aim of the reinforcement is to limit surface deformation after the appearance of a sinkhole by making the surface settlement as compatible as possible with the geometrical safety criteria of the road or railway line until earth filling and repair works can be scheduled. Full-scale tests were carried out on reinforced, instrumented road and railway structures subjected to localized collapse. At the same time, a numerical study was carried out to gain a better understanding of the mechanisms involved (arch effect, membrane effect, and collapse mechanisms). The experimental results of the full-scale tests were analyzed and compared with the results of three-dimensional finite element modeling.Key words: localized sinkhole, karstic cavity, reinforcement, geosynthetic.

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