|
|
|
| Safety Analysis of Concrete Barriers Shielding Roadside Obstacles from Impact Simulation Test |
| YANG Yong-hong1,2, ZHU Guan-ru1, TANG Zu-de1, YANG Lei3,4, CHEN Jing-yu4,5 |
1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou Guangdong 510640, China;
2. Key Laboratory of Highway Engineering of the Ministry of Education, Changsha University of Science & Technology, Changsha Hunan 410114, China;
3. Guangdong Provincial Communication Group Co., Ltd, Guangzhou Guangdong 510623, China;
4. Guangdong Provincial Key Laboratory of Tunnel Safety and Emergency Support Technology and Equipment, Guangzhou Guangdong 510545, China;
5. Guangdong Hualu Transport Technology Co., Ltd., Guangzhou 510420, Guangdong, China |
|
|
|
|
Abstract In order to select the barrier level in the roadside safety design, the models of single unit truck collisions with level 3 to level 6 concrete barriers was established by adopting explicit finite element software LS-DYNA 3D, the impact speed was between 40 km/h and 80 km/h. Using finite element model of modified vehicle verified by full-scale impact test to improve creditability of the simulation model. The relations between impact speed, level of concrete barriers and the amount of vehicle overhang beyond the barrier was studied, the effectiveness of concrete barriers shielding roadside obstacles was quantitatively evaluated, and the minimum safe distance from the traffic side of barriers to roadside obstacles was obtained, the relationship between the Chinese specification method and the 50 ms mean lateral impact force in the calculation of barrier impact force is compared; The equation of important roadside obstacle impact force was developed and evaluated, and the design value of important roadside obstacle impact force is revised. The results indicate that when the barrier level is level 3 to 6 and the design speed is 60 km/h for roads, the minimum safe distance between barriers and roadside obstacles is 1.8 m to 1.2 m, and for roads with the design speed of 80 km/h, the minimum safety distance between barriers and roadside obstacles is 3.0 m to 1.7 m, the single unit truck VIn of enhanced barrier is at least 5% lower than F-shape barrier, the enhanced barrier contain and redirect the single unit truck in a more stable manner. The 50ms mean lateral impact force between the cargo and the barrier is close to Chinese specification method. Under the same impact condition, higher level of barrier lower VIn significantly, however, the impact force of barrier increase greatly since the cargo more likely to collide with barrier.
|
|
Received: 30 October 2022
|
| Fund:Supported by the Key Technologies R&D Program of Guangdong Province (No. 2022B0101070001); Guangdong Basic and Applied Basic Research Foundation (No. 2021A1515011788); Open Fund of the Key Laboratory of Highway Engineering of Ministry of Education (Changsha University of Science & Technology) (No. kfj190201) |
|
|
|
[1] TG D81-2017, Design Specifications for Highway Safety Facilities[S]. (in Chinese)
[2] Insurance Institute for Highway Safety. Fatality Facts 2019 Collisions with Fixed Objects and Animals[Z]. Arlington, VA:IIHS, 2021:2021.
[3] BUTH C E, WILLIAMS W F, BRACKIN M S, et al. Analysis of Large Truck Collisions with Bridge Piers:Phase 1, Report of Guidelines for Designing Bridge Piers and Abutments for Vehicle Collisions[R]. College Station, Texas:Texas Transportation Institute, 2010.
[4] WEHBE N I, QIN X, TIGGES B, et al. Evaluation and Mitigation of Vehicle Impact Hazard for Overpasses[R]. South Dakota, South Dakota State University, 2017.
[5] El-TAWIL S, SEVERINO E, FONSECA P. Vehicle Collision with Bridge Piers[J]. Journal of Bridge Engineering. 2005, 10(3):345-353.
[6] GAN Xin-zhong, GAN You-wei, LIU Qun-yan, et al. Equivalent Model of Semi-trailer Impacting Crash Barrier[J]. Journal of China & Foreign Highway. 2020, 40(1):258-262. (in Chinese)
[7] WANG Juan, QIAN Jiang, ZHOU De-yuan. Numerical Simulation of Urban Bridge Substructures Impacted by Heavy Vehicles[J]. Journal of Hunan University (Natural Sciences). 2016, 43(7):88-95. (in Chinese)
[8] YUE Ming, YANG Feng, JIN Qi-bo. Analysis of Dynamic Response and Influencing Factors of Pier Impact Based on Ls-Dyna[J]. Highway Engineering. 2021, 46(4):171-176. (in Chinese)
[9] FANG Le, ZENG Yu-ye, CHEN Lin. General Vehicle Mechanical Model for Light and Medium Trucks Crashing into Bridge Piers[J]. Journal of Natural Disasters. 2021, 30(4):92-101. (in Chinese)
[10] WANG Juan, QIAN Jiang, ZHOU De-yuan. Parametric Study on Peak Impact Force for the Bridge Pier Impacted by Heavy Vehicles[J]. Chinese Quarterly of Mechanics. 2016, 37(2):337-344. (in Chinese)
[11] JTG D60-2015, General Specifications for Design of Highway Bridges and Culverts[S]. (in Chinese)
[12] AASHTO. LRFD Bridge Design Specifications[M]. 6th ed. Washington, D. C.:American Association of State Highway and Transportation Officials, 2012.
[13] SHEIKH N M, BLIGH R P, MENGES W L. Determination of Minimum Height and Lateral Design Load for MASH Test Level 4 Bridge rails[R]. College Station, Texas:Texas Transportation Institute, 2011.
[14] BUTH C E, KADERKA D L. Evaluation of L. B. Foster Precast Concrete Bolt-Down Barrier System[R]. College Station, Texas:Texas Transportation Institute, 1989.
[15] BUTH C E, HIRSCH T J, MENGES W L. Testing of New Bridge Rail and Transition Designs, Volume XI:Appendix J, 42-in (1. 07-m) F-Shape Bridge Railing[R]. McLean, Virginia. Department of Transportation. Federal Highway Administration, 1997.
[16] BULLARD D L, BLIGH R P, MENGES W L. MASH TL- 4 Testing and Evaluation of the New Jersey Safety Shape Bridge Rail[R]. United States. National Cooperative Highway Research Program, 2010.
[17] ALBERSON D C, ZIMMER R A, MENGES W L. NCHRP Report 350 Compliance Test 5-12 of the 1. 07 m Vertical Wall Bridge Railing[R]. United States. McLean, Virginia. Federal Highway Administration, 1997.
[18] TAI Yong-gang. Study on the Influence of the Height Change of Road Divided Median SA Level Concrete Barrier Protective Performance[J]. Highway. 2020, 65(11):258-262. (in Chinese)
[19] CUI Hong-jun, CUI Shan, XING Xiao-gao, et al. Impact of Guardrail Height Variation on Anti-collision Capability[J]. Journal of Chongqing Jiaotong University (Natural Science). 2015, 34(1):84-86. (in Chinese)
[20] GAO Kun. Study on Full Scale Collision of a New Type of Concrete Barrier on the Road Side[J]. Highway. 2019, 64(1):189-192. (in Chinese)
[21] YUAN Xu-yang. Collision Simulation Analysis of HAClass Anti-Collision Concrete Guardrail under Different Vehicle Types[J]. Journal of China & Foreign Highway. 2021, 41(6):288-291. (in Chinese)
[22] ZHOU Jin-yu, TANG Jun-yi, HUANG Jing-yun. Research on a New Type of Prefabricated Bridge Human-Vehicle Isolation Anti-Collision Guardrail[J]. Journal of China & Foreign Highway. 2022, 42(3):254-259. (in Chinese)
[23] GU Sai-nan, ZHANG Jian-hua, HE Zhi-ang. Hazard Analysis of Roadside Obstacle under Rigid Barrier Protection[J]. Highway. 2019, 64(8):299-303. (in Chinese)
[24] JTG D81-2006, Specifications for Design of Highway Safety Facilities[S]. (in Chinese)
[25] CAO R, AGRAWAL A K, El-Tawil S, et al. Numerical Studies on Concrete Barriers Subject to MASH Truck Impact[J]. Journal of Bridge Engineering. 2020, 25(7):4020035.
[26] LI Z, GAO X, TANG Z. Safety Performance of a Precast Concrete Barrier:Numerical Study[J]. Computer Modeling in Engineering & Sciences. 2020, 123(3):1105-1129.
[27] CHEN L, WU H, LIU T. Shear Performance Evaluation of Reinforced Concrete Piers Subjected to Vehicle Collision[J]. Journal of Structural Engineering. 2020, 146(4):4020026.
[28] JTG D20- 2017, Design Specification for Highway Alignment[S]. (in Chinese)
[29] JTG D81-2017, Design Guidelines for Highway Safety Facilities[S]. (in Chinese)
[30] MIELE C R, PLAXICO C A, KENNEDY J C, et al. Heavy Vehicle Infrastructure Asset Interaction and Collision[R]. Knoxville, TN:National Transportation Research Center, 2005.
[31] NTRCI. F800 Single Unit Truck FEM Model for Crash Simulations with LS-DYNA[Z]. 2005:2021.
[32] MOHAN P, MARZOUGUI D, CING D K. Validation of a Single Unit Truck Model for Roadside Hardware Impact[J]. International Journal of Vehicle Systems Modelling and Testing. 2007, 2(1):1-15.
[33] JTG B05- 01- 2013. Standards for Safety Performance Evaluation of Highway Barriers[S]. (in Chinese)
[34] CHEN L, El-Tawil S, XIAO Y. Reduced Models for Simulating Collisions between Trucks and Bridge Piers[J]. Journal of Bridge Engineering. 2016, 21(6):4016020.
[35] POLIVKA K A, FALLER R K, SICKING D L, et al. Performance Evaluation of the Permanent New Jersey Safety Shape Barrier-Update to NCHRP 350 test No. 4-12(2214NJ-2)[J]. Digital Commons@University of Nebraska-Lincoln, 2006.
[36] RAY M H, MONGIARDINI M, ANGHILERI M. Development of the Roadside Safety Verification and Validation Program[J]. Roadside Safety Verification and Validation Program, (Draft). 2008. https://api. semanticscholar. org/CorpusID:16645088
[37] OFFICIALS T. Manual for Assessing Safety Hardware, 2009[M]. AASHTO, 2009.
[38] HU Yu-wen, ZHOU De-yuan. Simulation of F-shape Concrete Barrier and Single Slope Concrete Barrier under the Vehicle Collision[J]. Structural Engineers. 2014, 30(3):41-47. (in Chinese)
[39] FAN Li-bo. Research on the Structure of Concrete Guardrail Based on Analysis of collision Process[D]. Beijing:Beijing Forestry University, 2019. (in Chinese)
[40] RAY M H, CARRIGAN C E, PLAXICO C A. Guidelines for shielding bridge piers[M]. Washington, DC:The National Academies Press, 2018. |
|
|
|
2023, Vol. 17 
