为研究三角刚架斜腿对系梁预应力约束作用的量化影响, 通过揭示其作用全过程, 引入基本假设, 基于混合法推导出对称三角刚架斜腿约束作用影响系数的计算公式, 通过拆合过程, 进一步提出了非对称三角刚架的影响系数实用计算方法, 并进行了工程实例验证分析。研究结果表明:斜腿约束作用为三角刚架固有特性, 其影响系数仅与截面尺寸、材料、几何形状有关;约束作用影响系数的公式计算结果与有限元分析结果及模型试验结果相对误差在5%以内, 可满足工程精度要求;消除斜腿约束作用不利影响的最优解决方案是在设计中提高系梁预应力的张拉控制力, 若设计时未考虑, 也可在施工中采取分段浇筑系梁混凝土或在斜腿中预留后浇带的方法解决。
Abstract
In order to quantify the impact of inclined leg of triangle rigid frame on the prestressing force restriction of tie-beam, mechanism of action during the whole process was revealed firstly. Based on some basic assumptions, calculation formulas of influence coefficient for inclined leg restriction for symmetrical triangle rigid frame were put forward with hybrid method. Then through the process of separation and mergence, a practical calculation method of influence coefficient for asymmetrical triangle rigid frame was put forward as well. Finally, engineering examples were taken to verify the analysis. The results show that inclined leg restriction is the inherent characteristic of triangle rigid frame, whose influence coefficient is only related to the cross-sectional dimension, material and geometric feature of a triangle rigid frame. The relative error between calculating result of influence coefficient and finite element simulated result and model test result is within 5%, satisfying the request of engineering. To eliminate the negative influence of inclined leg restriction, the optimal solution is to improve the prestressing force of tie-beam during the design. If not considered in design, it can take the solution of pouring tie-beam concrete segmentally or setting the post-pouring strip aside in inclined leg during the construction stage.
关键词
桥梁工程 /
三角刚架 /
混合法 /
斜腿约束作用 /
影响系数 /
实用计算方法
{{custom_keyword}} /
Key words
bridge engineering /
triangle rigid frame /
hybrid method /
inclined leg restriction /
influence coefficient /
practical calculation method
{{custom_keyword}} /
中图分类号：
U448.35
{{custom_clc.code}}
({{custom_clc.text}})
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 宋 杰.千岛湖大桥主要技术特点和创新[J].桥梁建设, 2007(2):58-61. SONG Jie.Major Technical Features and Innovation of Qiandao Lake Bridge[J].Bridge Construction,2007 (2):58-61.
[2] 李 跃, 古 松, 卜一之, 等.新光大桥三角刚架施工过程模型试验及有限元分析[J].公路交通科技, 2008, 25(2):94-100. LI Yue,GU Song,BU Yi-zhi,et al.Model Test and FEM Analysis on Triangle Frame of Xinguang Bridge[J].Journal of Highway and Transportation Research and Development,2008,25(2):94-100.
[3] 翟晓亮, 刘 喆, 冯云成.新月形拱-连续梁组合体系桥优化分析[J].公路交通科技, 2015, 32(3):68-74. ZHAI Xiao-liang,LIU Zhe,FENG Yun-cheng.Analysis of Optimizing Crescent Arch and Continuous Girder Combination Bridge[J].Journal of Highway and Transportation Research and Development,2015,32 (3):68-74.
[4] 勾红叶.大跨度预应力混凝土V形刚构拱组合桥受力行为研究[D].成都:西南交通大学, 2010. GOU Hong-ye.Study on the Mechanical Behaviors of Long-span Prestressed Concrete V-shape Rigid Frame Composite Arch Bridge [D].Chengdu:Southwest Jiaotong University,2010.
[5] 黄小伟,王 浩,李爱群, 等.中承式异形钢管混凝土拱桥动力特性分析[J].建筑科学与工程学报,2012,29(1):87-93. HUANG Xiao-wei,WANG Hao,LI Ai-qun,et al.Analysis on Dynamic Characteristics of Half-through Special-shaped CFST Arch Bridge[J].Journal of Architecture and Civil Engineering,2012,29(1):87-93.
[6] 孔 敏.倾斜型预压式钢-混凝土结合段受力性能研究[D].西安:长安大学, 2011. KONG Min.Study on Mechanical Performance of the Tilt-preloading Type Steel-concrete Combining Section[J].Xi'an:Chang'an University, 2011.
[7] 李国亮, 刘 钊.V形刚构桥施工中倒三角区域支架的拆除时机分析[J].公路交通科技, 2005, 22(8):95-101. LI Guo-liang,LIU Zhao.Study on the Demolishment Sequence of Scaffolds for the Inverted-triangle Area of the Rigid-frame Bridges with V-piers[J].Journal of Highway and Transportation Research and Development,2005,22(8):95-101.
[8] 闫子才, 黄 新, 张 敏.南京集庆门大桥V形墩刚构施工技术[J].桥梁建设, 2003(6):55-57,73. YAN Zi-cai,HUANG Xin,ZHANG Min.Construction Techniques for V-shape Pier Rigid-frame Structure of Jiqingmen Bridge in Nanjing[J].Bridge Construction,2003(6):55-57,73.
[9] 潘寿东.连续刚构桥V型墩“平衡支架法”施工技术研究[J].石家庄铁道学院学报, 2005, 18(4):100-104. PAN Shou-dong.Construction Technology of V-shaped Pier for Continuous Rigid Bridge with Balanced Trestle Method[J].Journal of Shijiazhuang Railway Institute,2005,18(4):100-104.
[10] 刘宝龙.水中大体积V型墩斜腿组合式支撑体系下施工技术研究[J].铁道工程学报, 2011(3):52-57. LIU Bao-long.Research on Construction Technology of Massive V-shape Pier in Water Under Slant-leg Combined Supporting[J].Journal of Railway Engineering Society,2011(3):52-57.
[11] 张义和.横桥向不等高V形墩施工关键技术研究[D].杭州:浙江工业大学, 2013. ZHANG Yi-he.Study on the Construction Technique of Transverse V-shaped Pier with Columns of Unequal Height [D].Hangzhou: Zhejiang University of Technology,2013.
[12] 罗甲生, 赵灿辉, 古 松, 等.连续刚架-拱桥三角刚架模型试验研究[J].桥梁建设, 2008(1):26-29. LUO Jia-sheng,ZHAO Can-hui,GU Song,et al.Model Test Study of Triangle Frame of a Continuous Rigid-framed Arch Bridge[J].Bridge Construction,2008 (1):26-29.
[13] 勾红叶, 蒲黔辉, 施 洲.大跨度V形刚构拱组合桥V形墩梁节点模型试验研究[J].土木工程学报, 2010, 43(3):99-105. GOU Hong-ye,PU Qian-hui,SHI Zhou.Model Test for the V-shape Pier-girder Joint of Long-span V-shape Rigid Frame Composite Arch Bridges[J].China Civil Engineering Journal,2010,43(3):99-105.
[14] 张国庆.V形墩连续梁桥墩顶拉板病害仿真分析及对策[J].桥梁建设, 2006(1):76-78. ZHANG Guo-qing.Simulation Analysis of and Countermeasures Against Deteriorations of Tensioning Plates Atop V-shape Piers of a Continuous Girder Bridge[J].Bridge Construction,2006(1):76-78.
[15] LIN T Y,BURNS N H.Design of Prestressed Concrete Structures[M].3rd ed.New York: John Wiley & Sons,1981.
[16] BORESI A P,SCHMIDT R J.Advanced Mechanics of Materials [M].6th ed.New York: John Wiley & Sons,2003.
[17] 包世华, 张铜生.高层建筑结构设计和计算[M].北京:清华大学出版社, 2007. BAO Shi-hua,ZHANG Tong-sheng.Design and Analysis of Tall-building Structure[M].Beijing: Tsinghua University Press,2007.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
基金
国家自然科学基金项目(51408040);云南省交通运输厅科技计划项目(云交科2013(A)02)
{{custom_fund}}
{{custom_fund}}
PDF全文下载(547 KB)
