考虑桥面板开裂的连续桥面简支梁桥力学性能研究
PDF下载 (336)林幸福 1,林 云 2,丁 勇 1,2*.考虑桥面板开裂的连续桥面简支梁桥力学性能研究[J].宁波大学学报(理工版),2016,29(4):86-91.DOI:
LIN Xing-fu 1,LIN Yun 2,DING Yong 1,2*.Research on Mechanical Properties of Simple Supported Girder Bridge with Continuous Deck Considering Crack of Slab[J].Journal of Ningbo University(Natural Science & Engineering Edition),2016,29(4):86-91.DOI:
| Title: | Research on Mechanical Properties of Simple Supported Girder Bridge with Continuous Deck Considering Crack of Slab |
| 作者: | 林幸福 1, 林 云 2, 丁 勇 1, 2* |
| Author(s): | LIN Xing-fu 1, LIN Yun 2, DING Yong 1, 2* |
| 关键词: | 多跨简支梁桥; 连续桥面; 边界转动弹簧; 混凝土开裂; 混凝土压碎 |
| Keywords: | multi-span simply supported bridge; continuous deck; boundary rotational spring; concrete crack; concrete crush |
| 分类号: | TU312 |
| 文献标识码: | A |
| 摘要: | 连续桥面简支梁桥可以减少桥梁伸缩缝、降低冲击荷载、提高行车舒适性. 但该类桥梁的桥面连续段容易开裂, 且开裂分析理论尚不完善, 阻碍了相关的设计与施工优化. 因此, 针对连续桥面多跨简支梁桥, 建立了一种带边界转动弹簧的简支梁模型, 提出了考虑桥面板开裂的力学性能分析方法, 探讨了荷载作用下桥梁整体与桥面连续段局部的工作性能. 实例分析表明, 汽车荷载作用下桥面连续段上部混凝土存在开裂, 下部混凝土容易压碎, 需要通过加大连续段长度等构造措施加以改进; 连续段混凝土的开裂对主梁的受力性能影响不大. |
| Abstract: | Application of the simple supported girder bridge with continuous deck can decrease expansion joints, reduce the impact load and improve riding comfort. But the continuous deck of this kind of bridge is easy to be cracked, and the analytical theory is incomplete to examine this problem. It hinders the improvement of design and bridge construction. Therefore, a simple supported beam model with boundary rotational spring is built to simulate simple supported girder bridge with continuous deck. An analytical method is presented which considers the crack of continuous slab for the mechanical behavior, the performance of the whole bridge and the link slab under load as well. The analysis shows that the concrete is cracked on the top of link slab when the bridge is under vehicle load, and is easily crushed on the bottom, too. It is found that the crack of the link slab concrete will not noticeably affect the mechanical behavior of the main girder of bridge. |
| 参考文献 /References: | [1] 马广德. 桥面连续简支梁桥的力素分析及设计方法的探讨[J]. 华东公路, 1985(2):49-60. [2] CANER A, ZIA P. Behavior and design of link slabs for jointless bridge decks[J]. PCI Journal, 1998, 43(3):68-80. [3] KIM Y Y, FISCHER G, LIM Y M, et al. Performance of bridge deck link slabs designed with ductile ECC[J]. ACI Structural Journal, 2004, 101(6):792-801. [4] SABER A, ALETI A R. Behavior of FRP link slabs in jointless bridge decks[EB/OL]. [2015-12-16]. http://www. docin.com/p-1458660559.html. [5] ZHANG J, WANG Z B, JU X C. Application of ductile fiber reinforced cementitious composite in jointless concrete pavements[J]. Composites (Part B), 2013, 50: 224-231. [6] 何畅, 向中富. 简支梁桥桥面连续构造的空间仿真分析[J]. 重庆交通学院学报, 2005, 24(1):9-15. [7] 丁勇, 黄奇, 黄剑源. 连续桥面简支梁桥静动力特性的理论方法研究[J]. 工程力学, 2015, 32(9):100-110. [8] GERE J M, TIMOSHENKO S P. Mechanics of materials [M]. 4th ed. London: Kluwer Academic Pub, 1998:154- 155. [9] 中华人民共和国交通部. 公路桥涵设计通用规范(JTJ D60-2004)[M]. 北京: 人民交通出版社, 2004:24-26. [10] 滕志明, 朱金铨. 混凝土结构及砌体结构[M]. 2版. 北京: 中国建筑工业出版社, 2003:18-19. |
| 备注/Memo: | 收稿日期: 2016－03－15. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省公益性技术应用研究计划（2015C33036）; 上海市工程结构安全重点实验室开放课题（2015-KF07）; 宁波市科技服务业示范项目（2015F1008）. 第一作者: 林幸福（1991－）, 男, 浙江衢州人, 在读硕士研究生, 主要研究方向: 桥梁工程. E-mail: lxf_1991515@163.com *通信作者: 丁勇（1975－）, 男, 浙江余姚人, 教授, 主要研究方向: 桥梁工程. E-mail: dingyong@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
