[1]施鑫磊,高德宝,李子奇,等.温度作用下混凝土拼接桥梁拼接缝界面剪应力研究*[J].中国安全生产科学技术,2021,17(11):158-164.[doi:10.11731/j.issn.1673-193x.2021.11.024]
SHI Xinlei,GAO Debao,LI Ziqi,et al.Study on interfacial shear stress at splicing joint of concrete spliced bridge under temperature effect[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(11):158-164.[doi:10.11731/j.issn.1673-193x.2021.11.024]
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温度作用下混凝土拼接桥梁拼接缝界面剪应力研究*
SHI Xinlei,GAO Debao,LI Ziqi,et al.Study on interfacial shear stress at splicing joint of concrete spliced bridge under temperature effect[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(11):158-164.[doi:10.11731/j.issn.1673-193x.2021.11.024]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 17
- 期数:
- 2021年11期
- 页码:
- 158-164
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2021-11-30
文章信息/Info
- Title:
- Study on interfacial shear stress at splicing joint of concrete spliced bridge under temperature effect
- 文章编号:
- 1673-193X(2021)-11-0158-07
- Keywords:
- spliced bridge; cast-in-place splicing joint; temperature effect; linear expansion coefficient; modulus of elasticity; shear flexibility
- 分类号:
- X947
- 文献标志码:
- A
- 摘要:
- 为探究拼宽混凝土桥梁在温度效应下连接缝位置产生的界面剪应力问题，考虑施工过程中现浇拼接缝混凝土各项参数的变化，以某高速公路拼接桥梁为研究对象，基于初等梁理论提出1种考虑纵向温度应力的拼宽桥梁界面剪应力力学模型。结果表明：拼接缝混凝土弹性模量的改变对拼接缝界面剪应力的数值和分布形态影响较小；新梁和旧梁的线膨胀系数差异越大拼接缝界面剪应力越大；研究得到不同拼宽宽度下拼宽桥界面局部剪切柔度修订值的变化规律，并拟合变化公式。
- Abstract:
- In order to investigate the problem of interfacial shear stress occurred at the joint position of the widened splicing concrete bridge under the temperature effect,considering the change in the parameters of the cast-in-place splicing joint concrete during the construction process,a mechanical model for the interfacial shear stress of widened bridge considering the longitudinal temperature stress was proposed based on the primary beam theory by taking a spliced bridge of highway as the research object.The results showed that the change in the modulus of elasticity of splicing joint concrete had little effect on the value and distribution pattern of interfacial shear stress at the splicing joint.The greater the difference in the linear expansion coefficient between the new and old beams,the greater the interfacial shear stress at the splicing joint.The variation law of the revised value of local shear flexibility at the interface of the widened splicing bridge under different widths of widened splicing was obtained and the variation equation was fitted.
参考文献/References:
［1］徐强.高速公路改扩建工程路基拼接技术［M］.北京:人民交通出版社,2011.
［2］上海市城乡建设和管理委员会.高速公路改扩建设计规范：DG/TJ 082174—2015［S］.上海:同济大学出版社,2015.
［3］聂建国,王宇航,樊健生,等.钢-混凝土组合梁加宽混凝土旧桥技术中组合横梁界面受力性能研究［J］.土木工程学报,2012,45(3):99-109.
NIE Jianguo,WANG Yuhang,FAN Jiansheng,et al.Mechanical behavior of the interface of composite cross beam in old concretebridges widened with steel-concrete composite beam ［J］.China Civil Engineering Journal,2012,45(3):99-109.
［4］陈记豪,赵顺波,姚继涛.既有预应力空心板桥加宽设计的荷载横向分布计算方法［J］.工程力学,2012,29(9):265-271.
CHEN Jihao,ZHAO Shunbo,YAO Jitao.Method for calculating vehicl load transverse distribution in widening design of existing ppchs bridge ［J］.Engineering Mechanics,2012,29(9):265-271.
［5］赵宝俊,党智平,朱郭瑞,等.空心板桥拓宽后新旧板耦合受力分析［J］.建筑科学与工程学报,2016,33(1):61-66.
ZHAO Baojun,DANG Zhiping,ZHU Guorui,et al.Analysis on coupling force of new and old beams afterwidening hollow slab bridge［J］.Journal of Architecture and Civil Engineering,2016,33(1):61-66.
［6］涂兵.拼宽混凝土桥梁结构的受力性能和可靠度研究［D］.长沙：湖南大学，2018.
［7］茹毅,刘其伟.收缩徐变作用下混凝土连续箱梁拼宽桥拼接段受力性能研究［J］.中外公路,2016,36(2):196-200.
RU Yi,LIU Qiwei.Research on mechanical behavior of splicing section of continuous concrete box girder bridgeunder shrinkage and creep ［J］.Journal of China & Foreign Highway,2016,36(2):196-200.
［8］薛俊青,林健辉.箱内边界模拟方法对箱梁截面温度场的影响研究［J］.桥梁建设,2019,49(4):52-57.
XUE Junqing,LIN Jianhui.Researsh on influence of simulation method of inner boundary codition on temperature distributions on cross-sections of concrete box girders ［J］.Bridge Construction,2019,49(4):52-57.
［9］HOSSEINI M,JEFFERSON A D.Time-dependent behaviour of widened reinforced concrete under-bridge［J］.Materials and Structures,1998,31(10)：54-57.
［10］王力,刘世忠,丁万鹏,等.干寒地区新型波形钢腹板组合箱梁温度效应分析［J］.工程科学与技术,2021,53(1):60-66.
WANG Li,LIU Shizhong,DING Wanpeng,et al.Analysis on temperature effect of new-pattern corrugated steel web composite box girder in dry cold region ［J］.Engineering Science and Technology,2021,53(1):60-66.
［11］林才奎,李义强,周海俊,等.低纬度地区混凝土箱梁温度梯度研究［J］.桥梁建设,2020,50(5):44-49.
LIN Caikui,LI Yiqiang,ZHOU Haijun,et al.Study of temperature gradient of concrete box firder in low-altitude region［J］.Bridge Construction,2020,50(5):44-49.
［12］丁万鹏,虞庐松,王力,等.近断层地震作用下考虑温度和碰撞效应的曲线梁桥地震响应分析［J］.中国安全生产科学技术,2020,16(6):5-10.
DING Wanpeng,YU Lusong,WANG Li,et al.Seismic response analysis of curved girder bridge under near-fault earthquakeconsidering temperature and collision effect ［J］.Journal of Safety Science and Technology,2020,16(6):5-10.
［13］孙建渊,谢津宝.基于等效龄期的钢管拱内混凝土硬化过程热应力［J］.同济大学学报(自然科学版),2019,47(6):755-763.
SUN Jianyuan,XIE Jinbao.Thermalstress of concrete-filled steel tube arch during hardening process based on equivalent age method ［J］.Journal of Tongji University （Natural Science）,2019,47(6):755-763.
［14］MANISHA M.Thermal and mechanical properties of concrete and its constituents at elevated temperatures:a review［J］.Construction and Building Materials,2020:121398.
［15］孙加林.高速铁路温度场作用下桥上无缝道岔与桥梁相互作用研究［J］.中国铁道科学,2017,38(1):43-48.
SUN Jialin.Interaction between seamless turn out and bridge of high speedrailway under temperature field［J］.China Railway Science,2017,38(1):43-48.
［16］SUHIR E.Analysis of interfacial thermal stresses in a trimaterial assembly［J］.Journal of Applied Physics,2001,89(7):3685-3694.
［17］徐仲卿.早龄期混凝土材料与构件力学性能试验研究［D］.北京：北京交通大学,2016.
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备注/Memo
- 备注/Memo:
-
收稿日期： 2021-04-30
* 基金项目： 甘肃省自然科学基金项目（20JR10RA237）;长江学者和创新团队发展计划滚动支持项目(IRT15R29)
作者简介： 施鑫磊，硕士研究生，主要研究方向为桥梁温度效应。
通信作者： 李子奇，博士，副教授，主要研究方向为大跨度桥梁施工控制关键技术。
