基于支持向量机法的混凝土强度对拼宽T梁桥时变可靠度影响分析

doi:10.3969/j.issn.1674-0696.2019.05.06

重庆交通大学学报（自然科学版） ›› 2019, Vol. 38 ›› Issue (05): 33-38.DOI: 10.3969/j.issn.1674-0696.2019.05.06

基于支持向量机法的混凝土强度对拼宽T梁桥时变可靠度影响分析

邬晓光1, 何启龙1, 2, 郑鹏1, 肖凯龙1

(1.长安大学桥梁与隧道陕西省重点实验室, 陕西西安 710064; 2. 中铁大桥(南京)桥隧诊治有限公司，江苏南京 210061)

收稿日期:2018-04-13 修回日期:2018-12-20 出版日期:2019-05-15 发布日期:2019-05-15
作者简介:邬晓光( 1961—), 男, 湖北黄冈人, 教授, 博士, 主要从事桥梁检测与加固方面的研究。E-mail：wxgwst.cn@126.com。
基金资助:
福建省交通运输厅2014年科技计划资助项目(Y-201400006)

Influence Analysis of Concrete Strength on Time-Varying Reliability of Widening T-Beam Bridge Based on Support Vector Method

WU Xiaoguang1, HE Qilong1, 2, ZHENG Peng1, XIAO Kailong1

(1. Key Laboratory for Bridge and Tunnel of Shaanxi Province, Changan University, Xian 710064, Shaanxi, P. R. China; 2. China Railway Major Bridge (Nanjing) Bridge and Tunnel Diagnosis & Treatment Co., Ltd., Nanjing 210061, Jiangsu, P. R. China)

Received:2018-04-13 Revised:2018-12-20 Online:2019-05-15 Published:2019-05-15

摘要/Abstract

摘要： 基于支持向量机法，研究了拼宽T梁桥的效应函数在小样本条件下的隐式函数拟合精度问题，误差小于5%；将拟合的隐式函数用于构建正截面抗弯承载力功能函数，分析了拼宽桥的时变可靠度变化规律。研究结果表明：SVM法预测结果偏小；分析强度时变效应及收缩徐变因素，在70 a内梁片结构可靠指标降低速率及幅度不显著，且较不分析时变效应时高；假设旧梁运营20 a后进行拓宽，新梁运营45 a内，拼宽桥体系可靠指标降低速率相对平缓；新梁运营45 a后，拼宽桥体系可靠指标减少则值得关注。

关键词: 桥梁工程, 拼宽T梁桥, 支持向量机, 混凝土强度, 钢束二次力, 收缩徐变, 时变效应, 可靠度

Abstract: Based on support vector method, the fitting accuracy of implicit function for the effect function of widening T-beam bridge under the condition of small sample was studied, whose error was less than 5%. The fitting implicit function was used to construct the function of flexural capacity of normal section, and the variation law of time-varying reliability of widening T-beam bridge was analyzed. The research results show that: the prediction results obtained by SVM method are smaller; considering the time-varying effect of concrete strength as well as shrinkage and creep, the reduction of reliability index of beam structure in 70 years is not significant, and it is higher than that of structure without considering time-varying effect. Taking the widening of old beams after 20 years of operation as an example, the reliability index of widening bridge system decreases relatively smoothly in 45 years of operation of new beams, while the reliability index of widening bridge system decreases significantly after 45 years of operation of new beams.

Key words: bridge engineering, widening T-beam bridge, support vector, concrete strength, secondary force of prestress, shrinkage and creep, time-varying effect, reliability

中图分类号:

U448.23

邬晓光1, 何启龙1, 2, 郑鹏1, 肖凯龙1. 基于支持向量机法的混凝土强度对拼宽T梁桥时变可靠度影响分析[J]. 重庆交通大学学报（自然科学版）, 2019, 38(05): 33-38.

WU Xiaoguang1, HE Qilong1, 2, ZHENG Peng1, XIAO Kailong1. Influence Analysis of Concrete Strength on Time-Varying Reliability of Widening T-Beam Bridge Based on Support Vector Method[J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(05): 33-38.

参考文献

［1］刘国. 拓宽加固后桥梁耐久性分析与评价［D］.西安:长安大学,2009.
LIU Guo. The Analysis and Evaluation of Durability for Reinforcement and Broadening of the Used Bridge［D］.Xian: Changan University, 2009.
［2］刘均利. 混凝土桥梁耐久性评估与预测［D］.长沙:湖南大学,2014.
LIU Junli. Durability Assessment and Prediction of Concrete Bridges［D］. Changsha: Hunan University, 2014.
［3］董华平. 混凝土桥梁加宽改造的结构可靠度分析［D］.长沙:湖南大学,2015.
DONG Huaping. Structure Reliability Analysis of Widening and Reconstruction of Concrete Bridge ［D］. Changsha: Hunan University, 2015.
［4］方志,董华平. 混凝土桥梁加宽改造后下部结构时变可靠度分析［J］. 桂林理工大学学报,2016,36(4):707-712.
FANG Zhi, DONG Huaping. Time-dependent reliability of the substructure for widened concrete girder bridges ［J］. Journal of Guilin University of Technology,2016, 36(4): 707-712.
［5］陈林海. 基于Kriging响应面法的刚构桥及连续梁桥可靠度分析［D］. 广州:华南理工大学, 2013.
CHEN Linhai. Reliability Analysis of Rigid Frame Bridge and Continuous Beam Bridge Based on Kriging Response Surface Method ［D］. Guangzhou:South China University of Technology, 2013.
［6］潘勇，黄进永，胡宁，等. 可靠度概论［M］. 北京:电子工业出版社, 2015：76-77.
PAN Yong，HUANG Jinyong，HU Ning，et al. An Overview of Reliability［M］. Beijing: Publishing House of Electronics Industry, 2015：76-77.
［7］张劲泉,刘焕昆，程寿山，等. 公路混凝土梁式桥结构损伤评定［M］. 北京:人民交通出版社, 2014.
ZHANG Jinquan, LIU Huankun, CHENG Shoushan, et al. Highway Beam Bridge Damage Evaluation［M］. Beijing: China Communications Press, 2014.
［8］冯乃谦, 邢锋. 混凝土与混凝土结构的耐久性［M］. 北京:机械工业出版社, 2009.
FENG Naiqian, XING Feng. Durability of Concrete and Concrete Structures［M］. Beijing: China Machine Press, 2009.
［9］廖朝华. 高速公路改扩建工程关键技术研究［D］. 武汉:武汉理工大学, 2009.
LIAO Chaohua. Study on Key Technologies in Expressway Reconstruction and Extension Project［D］. Wuhan:Wuhan University of Technology, 2009.
［10］交通部公路规划设计院.公路工程结构可靠度设计统一标准: GB/T 50283—1999 ［S］. 北京:中国计划出版社, 1999.
Highway Planning and Design Institute of the Ministry of Communications. Unified Standard for Reliability Design of Highway Engineering Structures: GB/T 50283—1999 ［S］. Beijing:China Planning Press, 1999.
［11］王华琪, 赵鸣, 李杰,等. 混凝土强度统计数据的分析与应用［J］. 同济大学学报(自然科学版), 2007, 35(7):861-865.
WANG Huaqi, ZHAO Ming, LI Jie, et al. Analysis and application of statistical data about concrete strength［J］. Journal of Tongji University (Natural Science), 2007, 35 (7): 861-865.
［12］彭建新, 邵旭东. 混凝土桥梁结构性能退化可靠性评估及全寿命设计方法［M］. 北京:人民交通出版社, 2014.
PENG Jianxin, SHAO Xudong. Reliability Assessment of Performance Deterioration and Whole-Life Design Method for Concrete Bridge Structures［M］. Beijing: China Communications Press, 2014.
［13］袁新朋. 公路预应力混凝土桥梁的可靠度分析［D］.成都:西南交通大学,2009.
YUAN Xinpeng. Reliability Evaluation of Highway Prestressed Concrete Bridge ［D］. Chengdu:Southwest Jiaotong University, 2009.
［14］ VAPNIK V N. The Nature of Satistical Learning Theory［M］. New York: Springer-Verlag, Inc,1999:988-999.
［15］ AI-ANAZI A F K. Support Vector Machines for Petrophysical Modelling and Lithoclassification［D］. Canada: University of Calgary, 2011.
［16］王玲, 穆志纯, 郭辉. 基于支持向量回归的增量建模方法［C］// 程代展，段广仁.第25届中国控制会议论文集.北京: 北京航空航天大学出版社,2006：415-419.
WANG Ling, MU Zhichun, GUO Hui. Incremental modeling method based on support vector regression［C］// CHENG Daizhan，DUAN Guangren. Proceedings of the 25th Chinese Control Conference. Beijing: Beihang University Press, 2006：415-419.
［17］鲁乃唯, 刘扬. 桥梁可靠度分析方法与应用［M］. 南京:东南大学出版社, 2017.
LU Naiwei, LIU Yang. Analysis Method and Application of Bridge Reliability ［M］. Nanjing:Southeast University press, 2017.
［18］张红显. 基于支持向量机的PC刚构桥施工期可靠度研究［D］.西安:长安大学,2017.
ZHANG Hongxian. Reliability Analysis of PC Rigid Frame Bridge during Construction Based on SVM［D］. Xian: Changan University, 2017.
［19］何启龙,邬晓光,贺攀,等.基于RBF-SVM的拼宽预应力混凝土T梁桥可靠度分析［J］.内蒙古大学学报(自然科学版),2018,49(4):431-438.
HE Qilong, WU Xiaoguang, HE Pan, et al. Study on the flexural reliability for the old T beams of widening PC bridges based on RBF-SVM［J］. Journal of Inner Mongolia University (Natural Science Edition),2018,49(4):431-438.
［20］ PADGETT J E, DESROCHES R. Methodology for the development of analytical fragility curves for retrofitted bridges［J］. Earthquake Engineering & Structural Dynamics, 2008, 37(8):1157-1174.
［21］熊学玉，顾炜.基于改进LHS方法的预应力混凝土结构长期性能概率分析［J］.工程力学，2010，27(4)：163-168.
XIONG Xueyu, GU Wei. Long-term performance probabilistic analysis of PC structure based on improved LHS method ［J］. Engineering Mechanics, 2010, 27 (4): 163-168.

[1]	周建庭1,2，黎娅2，张洪2，夏润川2，杨文琦2. 基于自发漏磁检测的钢绞线两点腐蚀试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(07): 74-81.
[2]	张华1，张正琦2 ，程高3，4，田伯科1. 黄土地区陡崖坡段桩基合理临坡距研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(07): 93-98.
[3]	刘金春，宋子轩，梁栋. 单箱三室连续梁桥在横向温度梯度与汽车偏载下的空间效应分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(06): 80-86.
[4]	郑植1,2，耿波2，袁佩2，李嵩林2，胡正涛3. 桥墩复合材料防船撞装置新型连接试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(05): 66-73.
[5]	张阳1，屈少钦1，卢九章2，霍文斌3. UHPC纤维定向法及对受拉性能影响[J]. 重庆交通大学学报（自然科学版）, 2021, 40(05): 74-80.
[6]	余曼,赵炜华,吴玲,李郁菡. 基于K-均值聚类和支持向量机的电动汽车行驶工况研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(05): 129-139.
[7]	傅立磊. 基于随机激励响应的参数识别相关函数法[J]. 重庆交通大学学报（自然科学版）, 2021, 40(04): 70-75.
[8]	苏小波1，肖林2. 空间刚架结构钢-混结合段合理构造模型试验和数值模拟研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(04): 76-82.
[9]	梁宗保1，柴洁1，纳守勇2，马天立1，唐玉1. 基于深度学习的桥梁健康监测数据有效性分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(03): 78-83.
[10]	唐启智1,辛景舟1,2,周建庭1,付雷1,3,张俊4. 基于时序分析的锈蚀RC拱损伤识别：仿真与验证[J]. 重庆交通大学学报（自然科学版）, 2021, 40(02): 69-77.
[11]	戎贤1,2，杨洪渭1，张健新1,2. 带钢端头的装配式混凝土梁柱中节点滞回性能试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(02): 78-82.
[12]	刘小会，许杨，陈思甜，徐略勤. 人行悬索桥地震响应分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(01): 65-71.
[13]	琚利平1，王银辉2，陆晓宏3，单继栋4. 行车落物作用下钢筋混凝土箱梁破坏形态分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(01): 72-78.
[14]	王桢1,2，周建庭1,3，张劲泉1,4，吴海军1，吴月星1. 现浇分段长度对万吨级平转斜拉桥受力的影响分析[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 44-52.
[15]	郝宪武，舒鹏，郝键铭. 大跨度非对称悬索桥的静风稳定性研究[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 53-59.

基于支持向量机法的混凝土强度对拼宽T梁桥时变可靠度影响分析

Influence Analysis of Concrete Strength on Time-Varying Reliability of Widening T-Beam Bridge Based on Support Vector Method

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics