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摘要: 采用有限元程序ANSYS建立T梁桥的铰接、湿接及湿接加整体层3种不同联结方式的空间杆单元模型, 编制了随机车流荷载谱, 利用桥梁动力分析软件系统(BDANS)计算了T梁桥在随机车流下的动挠度, 分析了其整体刚度特性。研究结果表明: 动力响应的横向分布规律和静力反应规律基本一致, 铰接联结T梁桥各片梁动力响应差异最大, 表明其整体刚度最差, 在各种运营状态下的最大动挠度是湿接与湿接加整体层联结方式时的1.30倍以上, 在一般运营单车道作用下达到了2.02倍, 而湿接和湿接加整体层联结各片梁动力响应一致性较好, 因此, 后2种联结方式显著提高T梁桥整体刚度。Abstract: ANSYS program was used to establish the space bar element models of T-beam bridges with three different transverse connections, such as hinging, wet seaming and wet seaming with integral layer.The load spectrum of random traffic flow was programmed.Bridge dynamic analysis system(BDANS)was used to calculate the dynamic deflection of T-beam bridge under random traffic flow, and its whole rigidity characteristic was analyzed.The result shows that the rule of transverse distribution of dynamic response is consistent with that of static reaction.The dynamic response of every beam for T-beam bridge with hinging connection is very different, which shows that its whole rigidity is worst.Its maximum deflections under various traffic operations are 1.30 times larger than those with other two connections, and can reach 2.02 times as much as those under regular one-lane traffic operation.The dynamic response of every beam for wet seaming connection and wet seaming connection with integral layer is similar.Therefore, the whole rigidities of T-beam bridges with the latter two connections increase evidently.
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Key words:
- bridge engineering /
- T-beam bridge /
- finite element method /
- whole rigidity /
- dynamic response
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图 4 铰接联结简支T梁桥跨中动挠度时程曲线
Figure 4. Time-history curves of dynamic deflections at mid span of simply supported T-beam bridge with hinging connection
图 5 湿接联结简支T梁桥跨中动挠度时程曲线
Figure 5. Time-history curves of dynamic deflections at mid span of simply supported T-beam bridge with wet seaming connection
图 6 湿接加整体层联结简支T梁桥跨中动挠度时程曲线
Figure 6. Time history curves of dynamic deflections at mid span of simply supported T-beam bridge with wet seaming and integral layer connection
图 7 铰接联结连续T梁桥跨中动挠度时程曲线
Figure 7. Time-history curves of dynamic deflections at mid span of continuous T-beam bridge with hinging connection
图 8 湿接联结连续T梁桥跨中动挠度时程曲线
Figure 8. Time history curves of dynamic deflections at mid span of continuous T-beam bridge with wet seaming connection
图 9 湿接加整体层联结连续T梁桥跨中动挠度时程曲线
Figure 9. Time-history curves of dynamic deflections at mid span of continuous T-beam bridge with wet seaming and integral layer connection
图 10 典型时刻简支T梁桥动挠度
Figure 10. Dynamic deflections of simply supported T-beam bridge at typical times
图 11 典型时刻连续T梁桥动挠度
Figure 11. Dynamic deflections of continuous T-beam bridge at typical times
表 1 132.85 s时刻简支T梁桥最大动挠度
Table 1. Maximum dynamic deflections of simply supported T-beam bridge at 132.85 s
表 2 135.90 s时刻连续T梁桥最大动挠度
Table 2. Maximum dynamic deflections of continuous T-beam bridge at 135.90 s
表 3 150 s内T梁桥的最大动挠度
Table 3. Maximum dynamic deflections of T-beam bridge in 150 s
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[1] 盛国刚, 彭献, 李传习. 车-桥耦合系统的动力特性分析[J]. 长沙交通学院学报, 2003, 19(4): 10-13. doi: 10.3969/j.issn.1674-599X.2003.04.003SHENG Guo-gang, PENG Xian, LI Chuan-xi. The dynamic analysis of bridge under moving vehicles[J]. Journal of Changsha Communications University, 2003, 19(4): 10-13. (in Chinese) doi: 10.3969/j.issn.1674-599X.2003.04.003 [2] 夏禾, 张宏杰, 曹艳梅, 等. 车桥耦合系统在随机激励下的动力分析及其应用[J]. 工程力学, 2003, 20(3): 142-149. doi: 10.3969/j.issn.1000-4750.2003.03.025XIA He, ZHANG Hong-jie, CAO Yan-mei, et al. Dynamic analysis of train-bridge system under random excitations[J]. Engineering Mechanics, 2003, 20(3): 142-149. (in Chinese) doi: 10.3969/j.issn.1000-4750.2003.03.025 [3] 韩万水. 风-汽车-桥梁系统空间耦合振动研究[D]. 上海: 同济大学, 2006.HAN Wan-shui. Three-dimensional coupling vibration of wind-vehicle-bridge system[D]. Shanghai: Tongji University, 2006. (in Chinese) [4] 许峰炜. 简支板梁桥车桥振动的横向分布特性研究[D]. 杭州: 浙江大学, 2006.XU Feng-wei. Study on transverse distribution of bridgevehicle interaction of simply supported plate girder bridge[D]. Hangzhou: Zhejiang University, 2006. (in Chinese) [5] 杨建荣. 车-桥耦合作用下公路桥梁局部振动研究[D]. 上海: 同济大学, 2007.YANG Jian-rong. Local dynamic response of highway bridges to moving vehicles[D]. Shanghai: Tongji University, 2007. (in Chinese) [6] 蒲军平, 汪小超, 刘鹏. 多跨变截面连续梁桥在车辆通过时的振动分析[J]. 中国公路学报, 2009, 22(1): 66-71. doi: 10.3321/j.issn:1001-7372.2009.01.011PU Jun-ping, WANG Xiao-chao, LIU Peng. Vibration analysis of multi-span continuous beam bridges with non-uniform cross section under moving vehicles[J]. China Journal of Highway and Transport, 2009, 22(1): 66-71. (in Chinese) doi: 10.3321/j.issn:1001-7372.2009.01.011 [7] 王达, 刘扬, 黄平明. 随机车流作用下双曲拱桥车-桥耦合振动研究[J]. 中国公路学报, 2009, 22(6): 67-73. doi: 10.3321/j.issn:1001-7372.2009.06.010WANG Da, LIU Yang, HUANG Ping-ming. Research on vehicle-bridge coupled vibration for two-way curved arch bridge under random traffic flow[J]. China Journal of Highway and Transport, 2009, 22(6): 67-73. (in Chinese) doi: 10.3321/j.issn:1001-7372.2009.06.010 [8] 方自虎, 宋启根. 移动荷载下钢筋混凝土多片T梁桥的非线性有限条分析[J]. 中国公路学报, 1994, 7(2): 38-43. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL402.006.htmFANG Zi-hu, SONG Qi-gen. Nonlinear finite strip analysis of RC bridge with multiple T-beams under moving loading[J]. China Journal of Highway and Transport, 1994, 7(2): 38-43. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL402.006.htm [9] 黄华, 刘伯权, 刘鸣. 车辆荷载谱作用下简支T梁力学性能[J]. 长安大学学报: 自然科学版, 2007, 27(2): 58-62. doi: 10.3321/j.issn:1671-8879.2007.02.014HUANG Hua, LIU Bo-quan, LIU Ming. Mechanics performance of simple supported T-beam under vehicle load spectrum[J]. Journal of Chang'an University: Natural Science Edition, 2007, 27(2): 58-62. (in Chinese) doi: 10.3321/j.issn:1671-8879.2007.02.014 [10] 王达, 韩万水, 黄平明, 等. 桥面平整度对大跨度悬索桥车桥耦合振动的影响[J]. 长安大学学报: 自然科学版, 2009, 29(4): 53-58. doi: 10.3321/j.issn:1671-8879.2009.04.012WANG Da, HAN Wan-shui, HUANG Ping-ming, et al. Influence of bridge surface roughness on vehicle-bridge coupled vibration of long-span suspension bridge[J]. Journal of Chang'an University: Natural Science Edition, 2009, 29(4): 53-58. (in Chinese) doi: 10.3321/j.issn:1671-8879.2009.04.012 [11] 袁明, 余钱华, 颜东煌. 基于车-桥系统耦合振动理论的大跨PC连续刚构桥冲击系数研究[J]. 中国公路学报, 2008, 21(1): 72-76. doi: 10.3321/j.issn:1001-7372.2008.01.013YUAN Ming, YU Qian-hua, YAN Dong-huang. Research on impact coefficient for PC continuous rigid frame bridges with long-span under theory of vehicle-bridge system coupling vibration[J]. China Journal of Highway and Transport, 2008, 21(1): 72-76. (in Chinese) doi: 10.3321/j.issn:1001-7372.2008.01.013 [12] 周新平, 宋一凡, 贺拴海. 公路曲线梁桥车桥耦合振动数值分析[J]. 长安大学学报: 自然科学版, 2009, 29(6): 41-46. doi: 10.3321/j.issn:1671-8879.2009.06.010ZHOU Xin-ping, SONG Yi-fan, HE Shuan-hai. Numerical analysis for coupled vibration of vehicle-bridge on highway curved-bridge[J]. Journal of Chang'an University: Natural Science Edition, 2009, 29(6): 41-46. (in Chinese) doi: 10.3321/j.issn:1671-8879.2009.06.010 [13] 徐建炜. T形梁桥整体刚度研究[D]. 西安: 长安大学, 2009.XU Jian-wei. Study on the whole rigidity of T-beam bridge[D]. Xi'an: Chang'an University, 2009. (in Chinese) [14] 韩万水, 黄平明, 兰燕. 轻质高强微膨胀混凝土加固拱桥的动力分析[J]. 长安大学学报: 自然科学版, 2005, 25(4): 44-47, 65. doi: 10.3321/j.issn:1671-8879.2005.04.011HAN Wan-shui, HUANG Ping-ming, LAN Yan. Dynamic analysis of arch bridges strengthened with high strength micro-expansive lightweight aggregate concrete[J]. Journal of Chang'an University: Natural Science Edition, 2005, 25(4): 44-47, 65. (in Chinese) doi: 10.3321/j.issn:1671-8879.2005.04.011 -
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