采用墙式整体桥台的无缝桥受力特征

朱伟庆; 衡江峰; 刘永健; 王卫山

采用墙式整体桥台的无缝桥受力特征

1.
长安大学公路学院, 陕西西安 710064
2.
西安公路研究院, 陕西西安 710065

基金项目:

国家自然科学基金项目 51508027

陕西省交通运输厅科研项目 14-19K, 14-20K

详细信息

作者简介:
朱伟庆(1987-), 男, 湖南娄底人, 长安大学讲师, 工学博士, 从事桥梁工程研究

中图分类号: U448.21
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- 被引次数: 0
出版历程
- 收稿日期: 2017-07-03
- 刊出日期: 2017-12-25

Mechanical characteristics of jointless bridge with wall-type integral abutment

1.
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Xi'an Highway Institute, Xi'an 710065, Shaanxi, China

More Information

Author Bio:
ZHU Wei-qing(1987-), male, lecturer, PhD, zhuweiqing87@126.com

摘要

摘要: 建立了考虑桥台-土相互作用的墙式整体桥台无缝桥的空间有限元模型, 采用实测数据验证了模型的准确性; 分析了不同荷载工况下主梁与桥台的受力特征, 研究了温度、台后填土密实度与桥梁跨径对桥梁受力特征的影响。研究结果表明: 与同等跨径简支梁桥相比, 墙式整体桥台无缝桥受力最不利主梁的跨中弯矩降低了20%~40%, 跨中与梁端弯矩之和降低了约28%, 说明主梁内力分布比较均匀, 结构纵、横桥向整体性增强; 桥台顶部存在较大的弯矩和剪力, 桥台变形比较复杂; 墙式整体桥台无缝桥的内力和变形受温度作用的影响较为明显, 且梯度升温与整体降温在梁端产生正弯矩, 梯度降温与整体升温在梁端产生负弯矩, 因此, 设计过程中对于不同的构件应选用合适的荷载工况; 台后填土密实度由松散变化至密实时, 整体升温或降温作用下主梁梁端和跨中弯矩变化幅度小于5%, 桥台变形幅度小于9%, 说明台后填土密实度对主梁弯矩和桥台变形的影响较小; 当桥梁跨径由6m增加至13m时, 桥台顶部弯矩增加了1.781倍, 桥台内力随跨径的增大而快速增大, 因此, 在墙式整体桥台无缝桥梁的设计时, 建议最大跨径不超过10m, 以控制桥台在正常使用极限状态下的混凝土裂缝宽度。
- 桥梁工程 /
- 整体式无缝桥 /
- 有限元模型 /
- 受力特征 /
- 桥台-土相互作用 /
- 跨径限值
Abstract: The spatial finite element model of jointless bridge with wall-type integral abutment was established under considering the abutment-soil interaction, and its accuracy was validated by using the measured data.The mechanical characteristics of main girder and abutment under different load cases were analyzed, and the effects of temperature, backfill compactness and bridge span on the mechanical characteristics were studied.Research result shows that, compared to the simply supported girder bridge with same span, the mid-span moment of worst stress condition's main girder of jointless bridge with wall-type integral abutment decreases by 20%-40%, and the sum of mid-span moment and girder-end moment decreases by 28%, which indicates that the distribution of internal force is more balance, and the structural integrity of longitudinal and transverse directions is more obvious.The top of abutment has larger moment and shear force, and the deformation of abutment is complex.The internal force and deformationof jointless bridge with wall-type integral abutment are sensitive to temperature actions.That gradient temperature rises and overall temperature decreases causes girder-end positive moment, and that gradient temperature decreases and overall temperature rises causes girder-end negative moment, so suitable load cases should be chosen for different members during design process.When the backfill compactness changes from loose to compact, the variations of main girder's end and mid-span moments are less than 5% when overall temperature rises or decreases, and the variation of abutment deformation is less than 9%, which indicates that backfill compactness has little effect on main girder moment and abutment deformation.When the bridge span changes from 6 mto 13 m, the top moment of abutment increases by 1.781 times, and the internal force of abutment increases rapidly.Therefore, it is suggested that the bridge span should not exceed10 mduring the design process of jointless bridge with wall-type integral abutment to control the concrete crack width of abutment under the serviceability limit state.
- bridge engineering /
- integral jointless bridge /
- finite element model /
- mechanical characteristic /
- abutment-soil interaction /
- span limit

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图 1 马家山桥总体布置(单位: cm)

Figure 1. Overall arrangement of Majiashan Bridge (unit: cm)

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图 2 主梁截面(单位: cm)

Figure 2. Cross sections of main girder (unit: cm)

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图 3 桥台构造(单位: cm)

Figure 3. Abutment construction (unit: cm)

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图 4 有限元模型

Figure 4. Finite element model

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图 5 台顶变形计算结果与实测数据

Figure 5. Calculation result and testing data of top deformation of abutment

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图 6 台底变形计算结果与实测数据

Figure 6. Calculation result and testing data of bottom deformation of abutment

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图 7 主梁1梁端弯矩计算结果与实测数据

Figure 7. Calculation result and testing data of end moment of main girder 1

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图 8 主梁4梁端弯矩计算结果与实测数据

Figure 8. Calculation result and testing data of end moment of main girder 4

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图 9 桥台内力沿高度分布

Figure 9. Internal force distributions along abutment height

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图 10 温度荷载作用下的主梁轴力

Figure 10. Axial force of main girder under temperature load

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图 11 温度荷载作用下的主梁梁端弯矩

Figure 11. Main girder end moment under temperature load

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图 12 温度荷载作用下的桥台变形

Figure 12. Deformations of abutment under temperature loads

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图 13 台后填土密实度对主梁轴力的影响曲线

Figure 13. Effect curves of backfill compactness on axial force of main girder

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图 14 台后填土密实度对主梁梁端弯矩的影响曲线

Figure 14. Effect curves of backfill compactness on moment of main girder end

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图 15 台后填土密实度对主梁跨中弯矩的影响曲线

Figure 15. Effect curves of backfill compactness on mid-span moment of main girder

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图 16 不同跨径时的裂缝宽度

Figure 16. Crack widths under different spans

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表 1 材料参数

Table 1. Parameters of materials

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表 2 整体桥台无缝桥主梁内力

Table 2. Main girder internal forces of jointless bridge with integral abutment

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表 3 简支梁桥主梁内力

Table 3. Main girder internal forces of simply supported girder bridge

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表 4 填土性质

Table 4. Backfill properties

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表 5 台后填土密实度对桥台变形的影响

Table 5. Effect of backfill compactness on abutment deformation

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表 6 不同跨径时主梁与桥台内力

Table 6. Internal forces of main girder and abutment under different spans

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参考文献(32)

[1]	KUNIN J, ALAMPALLI S. Integral abutment bridges: current practice in United States and Canada[J]. Journal of Performance of Constructed Facilities, 2000, 14 (3): 104-111. doi: 10.1061/(ASCE)0887-3828(2000)14:3(104)
[2]	AHN J H, YOON J H, KIM J H, et al. Evaluation on the behavior of abutment-pile connection in integral abutment bridge[J]. Journal of Constructional Steel Research, 2011, 67 (7): 1134-1148. doi: 10.1016/j.jcsr.2011.02.007
[3]	DICLELI M. Simplified model for computer-aided analysis of integral bridges[J]. Journal of Bridge Engineering, 2000, 5 (3): 240-248. doi: 10.1061/(ASCE)1084-0702(2000)5:3(240)
[4]	AROCKIASAMY M, BUTRIENG N, SIVAKUMAR M. State-of-the-art of integral abutment bridges: design and practice[J]. Journal of Bridge Engineering, 2004, 9 (5): 497-506. doi: 10.1061/(ASCE)1084-0702(2004)9:5(497)
[5]	KIM S H, YOON J H, KIM J H, et al. Structural details of steel girder-abutment joints in integral bridges: an experimental study[J]. Journal of Constructional Steel Research, 2012, 70: 190-212. doi: 10.1016/j.jcsr.2011.07.009
[6]	FELDMANN M, NAUMES J, PAK D, et al. Economic and durable design of composite bridges with integral abutments (INTAB+)[R]. Luxembourg: European Union, 2012.
[7]	VTrans Integral Abutment Committee. Integral Abutment Bridge Design Guidelines[M]. Montpelier: VTrans Integral Abutment Committee, 2008.
[8]	KONG B, CAI C S, KONG X. Field monitoring study of an integral abutment bridge supported by prestressed precast concrete piles on soft soils[J]. Engineering Structures, 2015, 104: 18-31. doi: 10.1016/j.engstruct.2015.09.004
[9]	CIVJAN S A, KALAYCI E, QUINN B H, et al. Observed integral abutment bridge substructure response[J]. Engineering Structures, 2013, 56: 1177-1191. doi: 10.1016/j.engstruct.2013.06.029
[10]	DICLELI M, ERHAN S. Effect of soil-bridge interaction on the magnitude of internal forces in integral abutment bridge components due to live load effects[J]. Engineering Structures, 2010, 32 (1): 129-145. doi: 10.1016/j.engstruct.2009.09.001
[11]	DICLELI M, ALBHAISI S M. Performance of abutmentbackfill system under thermal variations in integral bridges built on clay[J]. Engineering Structures, 2004, 26 (7): 949-962. doi: 10.1016/j.engstruct.2004.02.014
[12]	KIM W S, LAMAN J A. Integral abutment bridge response under thermal loading[J]. Engineering Structures, 2010, 32 (6): 1495-1508. doi: 10.1016/j.engstruct.2010.01.004
[13]	ZORDAN T, BRISEGHELLA B, LAN Cheng. Parametric and pushover analyses on integral abutment bridge[J]. Engineering Structures, 2011, 33 (2): 502-515. doi: 10.1016/j.engstruct.2010.11.009
[14]	KALAYCI E, CIVJAN S A, BREÑA S F. Parametric study on the thermal response of curved integral abutment bridges[J]. Engineering Structures, 2012, 43: 129-138. doi: 10.1016/j.engstruct.2012.05.007
[15]	KIM W S, LAMAN J A. Numerical analysis method for longterm behavior of integral abutment bridges[J]. Engineering Structures, 2010, 32 (8): 2247-2257. doi: 10.1016/j.engstruct.2010.03.027
[16]	DENG Yao-hua, PHARES B M, GREIMANN L, et al. Behavior of curved and skewed bridges with integral abutments[J]. Journal of Constructional Steel Research, 2015, 109: 115-136. doi: 10.1016/j.jcsr.2015.03.003
[17]	DICLELI M. A rational design approach for prestressed-concretegirder integral bridges[J]. Engineering Structures, 2000, 22 (3): 230-245. doi: 10.1016/S0141-0296(98)00080-7
[18]	ERHAN S, DICLELI M. Live load distribution equations for integral bridge substructures[J]. Engineering Structures, 2009, 31 (5): 1250-1264. doi: 10.1016/j.engstruct.2009.01.020
[19]	DICLELI M, ENG P, ALBHAISI S M. Maximum length of integral bridges supported on steel H-piles driven in sand[J]. Engineering Structures, 2003, 25 (12): 1491-1504. doi: 10.1016/S0141-0296(03)00116-0
[20]	DICLELI M, ALBHAISI S M. Estimation of length limits for integral bridges built on clay[J]. Journal of Bridge Engineering, 2004, 9 (6): 572-581. doi: 10.1061/(ASCE)1084-0702(2004)9:6(572)
[21]	DICLELI M, ALBHAISI S M. Analytical formulation of maximum length limits of integral bridges on cohesive soils[J]. Canadian Journal of Civil Engineering, 2005, 32 (4): 726-738. doi: 10.1139/l05-024
[22]	金晓勤, 邵旭东. 整体式无缝桥梁的研究与应用[J]. 重庆交通大学学报, 2002, 21 (3): 7-10. doi: 10.3969/j.issn.1674-0696.2002.03.003 JIN Xiao-qin, SHAO Xu-dong. Study and practice on integral abutment bridge[J]. Journal of Chongqing Jiaotong University, 2002, 21 (3): 7-10. (in Chinese). doi: 10.3969/j.issn.1674-0696.2002.03.003
[23]	彭大文, 汪新惠, 洪锦祥. 无伸缩缝桥梁的动力特性研究[J]. 地震工程与工程振动, 2003, 23 (4): 95-99. doi: 10.3969/j.issn.1000-1301.2003.04.016 PENG Da-wen, WANG Xin-hui, HONG Jin-xiang. Research on dynamic characteristics of jointless bridges[J]. Earthquake Engineering and Engineering Vibration, 2003, 23 (4): 95-99. (in Chinese). doi: 10.3969/j.issn.1000-1301.2003.04.016
[24]	庄一舟, 樊争辉, 陈宝春. 整体式桥台桥梁的桥头搭板设计[J]. 世界桥梁, 2012, 40 (1): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-GWQL201201001.htm ZHUANG Yi-zhou, FAN Zheng-hui, CHEN Bao-chun. Design of approach slab of integral abutment bridges[J]. World Bridges, 2012, 40 (1): 1-6. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GWQL201201001.htm
[25]	朱伟庆, 刘永健, 衡江峰, 等. 采用不同下部结构形式的整体式无缝桥受力特征[J]. 建筑科学与工程学报, 2017, 34 (1): 49-57. doi: 10.3969/j.issn.1673-2049.2017.01.007 ZHU Wei-qing, LIU Yong-jian, HENG Jiang-feng, et al. Mechanical characteristics of integral abutment bridges with different substructures[J]. Journal of Architecture and Civil Engineering, 2017, 34 (1): 49-57. (in Chinese). doi: 10.3969/j.issn.1673-2049.2017.01.007
[26]	BOWLES J E. Elastic foundation settlements on sand deposits[J]. Journal of Geotechnical Engineering, 1987, 113 (8): 846-860. doi: 10.1061/(ASCE)0733-9410(1987)113:8(846)
[27]	BROMS B B, INGELSON I. Earth pressure against the abutments of a rigid frame bridge[J]. Géotechnique, 1971, 21 (1): 15-28. doi: 10.1680/geot.1971.21.1.15
[28]	DUNCAN J M, SCHAEFER V R. Finite element consolidation analysis of embankments[J]. Computers and Geotechnics, 1988, 6 (2): 77-93. doi: 10.1016/0266-352X(88)90075-4
[29]	ARSOY S, DUNCAN J M, BARKER R M. Behavior of a semi-integral bridge abutment under static and temperatureinduced cyclic loading[J]. Journal of Bridge Engineering, 2004, 9 (2): 193-199. doi: 10.1061/(ASCE)1084-0702(2004)9:2(193)
[30]	LEHANE B M, KEOGH D L, OBRIEN E J. Simplified model for restraining effects of backfill soil on integral bridges[J]. Computers and Structures, 1999, 73 (1-5): 303-313. doi: 10.1016/S0045-7949(98)00247-8
[31]	LAMAN J A, KIM W S. Monitoring of integral abutment bridges and design criteria development[R]. Harrisburg: The Pennsylvania Department of Transportation, 2009.
[32]	MATLOCK H, REESE L C. Generalized solutions for laterally loaded pile[C]//ASCE. A History of Progress: Selected U. S. Papers in Geotechnical Engineering. Reston: ASCE, 2002: .