车辆撞击下钢筋混凝土桥墩的动力响应及损伤特征

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (13) : 268-273.

论文

陈林，曾玉烨，颜泽峰，祝明桥

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Dynamic Response and Damage Characteristics of Reinforced Concrete Piers Subjected to Vehicle Collisions

CHEN Lin, YAN Ze-feng, ZHU Ming-qiao

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摘要

本文基于LS-DYNA软件对车辆与典型钢筋混凝土桥墩的碰撞进行了非线性有限元模拟，重点考察了不同边界条件和箍筋直径的桥墩在车辆撞击作用下的动力响应及损伤特征，特别是钢筋混凝土桥墩的典型破坏形态。分析结果表明：1）桥墩主要发生剪切破坏，且桥墩底部固定约束位置由地面处下降1 m时，桥墩主要损伤区域将由地面以上1.2 m扩大至地面以上2.5 m；2）当桥墩箍筋直径由8 mm增大至24 mm时，桥墩最大水平位移平均降低71.3%；3）上部结构重力作用使得桥墩名义撞击高度范围内受拉纵筋应力大幅减少。

Abstract

Based on the LS-DYNA software, nonlinear finite element simulations of truck collisions with typical reinforced concrete piers were conducted in this study. The dynamic responses and damage characteristics of the piers with different boundary conditions and stirrup ratios were focused, especially the typical damage patterns of reinforced concrete bridge piers under the actions of truck collisions. The analysis results revealed that: 1) piers mainly fail in shear, and when the fixed constraint position at the bottom of the piers lowers by 1 m from the ground, the main damage area of piers expand from 1.2 m to 2.5 m above the ground; 2) when the diameter of pier stirrups increases from 8 mm to 24 mm, the maximum horizontal displacement of the piers reduces by an average of 71.3%; 3) due to the gravity loads of the upper structures, the stress of the tensile longitudinal rebar of the piers at the range of the nominal impact height reduces significantly.

关键词

车辆

/ 碰撞 / 桥墩 / 有限元分析 / 损伤

Key words

Vehicle

/ Collision / Pier / Finite Element Analysis / Damage

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陈林，曾玉烨，颜泽峰，祝明桥. 车辆撞击下钢筋混凝土桥墩的动力响应及损伤特征[J]. 振动与冲击, 2019, 38(13): 268-273

CHEN Lin, YAN Ze-feng, ZHU Ming-qiao. Dynamic Response and Damage Characteristics of Reinforced Concrete Piers Subjected to Vehicle Collisions[J]. Journal of Vibration and Shock, 2019, 38(13): 268-273

参考文献

[1] 陈林，肖岩. 桥墩防车辆撞击研究综述[J]. 公路交通科技. 2012, 29(8): 140-148.
CHEN Lin, XIAO Yan. Review of Studies of Vehicle Anti—collision on Bridge Piers[J]. Journal of Highway and Transportation Research and Development. 2012, 29(8): 140-148.
[2] Popp C. Der Querstoß beim Anprall von Kraftfahrzeugen auf Stützen und Rahmenstiele von Straßenunterführungen[M]. Köln: Stahlbau-Verlag, 1961: 108.
[3] Buth C E, Brackin M S, Williams W F, et al. Collision Loads on Bridge Piers: Phase 2. Report of Guidelines for Designing Bridge Piers and Abutments for Vehicle Collisions[R]. Texas: Texas Transportation Institute Proving Ground, 2011.
[4] 朱亚迪，卢文良. 小车墩柱撞击力模型试验研究[J]. 振动与冲击. 2013, 32(21): 182-185.
ZHU Ya-di, LU Wen-liang. Experimental Research on Force of Vehicle Collision with Piers[J]. Journal of Vibration and Shock. 2013, 32(21): 182-185.
[5] Chen L, Xiao Y, El-Tawil S. Impact Tests of Model RC Columns by an Equivalent Truck Frame[J]. Journal of Structural Engineering. 2016, 142(5): 4016002.
[6] Demartino C, Wu J G, Xiao Y. Response of shear-deficient reinforced circular RC columns under lateral impact loading[J]. International Journal of Impact Engineering. 2017, 109: 196-213.
[7] El-Tawil S, Severino E, Fonseca P. Vehicle Collision with Bridge Piers[J]. Journal of Bridge Engineering. 2005, 10(3): 345-353.
[8] 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]. Texas: Texas Transportation Institute, 2010.
[9] 刘明慧，颜全胜. 汽车撞击桥墩作用力的比较分析[J]. 中外公路. 2010, 30(6): 146-149.
LIU Ming-hui, YAN Quan-sheng. Comparative analysis of the vehicle-pier collision force[J]. Journal of China & Foreign Highway. 2010, 30(6): 146-149.
[10] 曾祥国，朱文吉，唐光武，等. 车辆撞击下桥墩动力响应与撞击力的数值分析[J]. 四川大学学报(工程科学版). 2012, 44(S2): 171-174.
ZENG Xiang-guo, ZHU Wen-ji, TANG Guang-wu, etc. Numerical analysis of dynamic response and impact force of overpass bridge pier under vehicles' collison[J]. Journal of Sichuan University (Engineering Science Edition). 2012, 44(S2): 171-174.
[11] 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.
[12] 崔堃鹏，夏禾，夏超逸，等. 汽车撞击桥墩瞬态撞击力的等效静力计算[J]. 振动与冲击. 2014, 33(4): 48-53.
CUI Kun-peng, XIA He, XIA Chao-yi, etc. Equivalent static calculation methods of transient impact force of truck collision with piers[J]. Journal of Vibration and Shock. 2014, 33(4): 48-53.
[13] Chen L, El-Tawil S, Xiao Y. Response spectrum-based method for calculating the reaction force of piers subjected to truck collisions[J]. Engineering Structures. 2017, 150(1): 852-863.
[14] 蒋洪涛，裴小吟. 车辆撞击城市跨线桥桥墩的损伤机理分析[J]. 西部交通科技. 2011(01): 66-69.
JIANG Hong-tao, PEI Xiao-yin. The damage mechanism of overpass bridge piers caused by automobiles[J]. Western China Communications Science & Technology. 2011(01): 66-69.
[15] Agrawal A K, Liu G, Alampalli S. Effects of Truck Impacts on Bridge Piers[J]. Advanced Materials Research. 2013, 639-640: 13-25.
[16] Do T V, Pham T M, Hao H. Dynamic responses and failure modes of bridge columns under vehicle collision[J]. Engineering Structures. 2018, 156(1): 243-259.
[17] Do T V, Pham T M, Hao H. Numerical investigation of the behavior of precast concrete segmental columns subjected to vehicle collision[J]. Engineering Structures. 2018.
[18] Miele C R, Plaxico C A, Kennedy J C, et al. Heavy Vehicle Infrastructure Asset Interaction and Collision[R]. Knoxville: National Transportation Research Center, Incorporated, 2005.
[19] Mohan P, Marzougui D, Kan C S. Validation of a Single Unit Truck Model for Roadside Hardware Impact[R]. Ashburn: NCAC, 2003.
[20] Malvar L J, Crawford J E, Wesevich J W, et al. A plasticity concrete material model for DYNA3D[J]. International Journal of Impact Engineering. 1997, 19(9-10): 847-873.
[21] Malvar L J, Crawford J E. Dynamic Increase Factors for Concrete[C]. Orlando: 1998.
[22] Malvar L J, Crawford J E. Dynamic Increase Factors for Steel Reinforcing Bars[C]. Orlando: 1998.
[23] Saatci S. Behaviour and Modelling of Reinforced Concrete Structures Subjected to Impact Loads[D]. Toronto: University of Toronto, 2007.
[24] Ls-Dyna. LS-DYNA keyword user’s manual. Version 971[R]. Livermore, California: Livermore Software Technology Corporation, 2010.