钢-混组合索塔锚固结构的力学行为及结构优化

肖林; 刘丽芳; 卫星; 刘德军

doi:10.3969/j.issn.0258-2724.20170320

钢-混组合索塔锚固结构的力学行为及结构优化

doi: 10.3969/j.issn.0258-2724.20170320

肖林^1,,
刘丽芳¹,
卫星^1, ,,
刘德军²

基金项目: 国家自然科学基金资助（51308467、51578455）、中央高校基本科研业务费资助项目（2682016CX016）

详细信息

作者简介:
肖林（1982—），男，副教授，博士，研究方向为梁钢结构及钢-混组合结构，E-mail：xiaolin@swjtu.edu.cn

通讯作者:
卫星（1976—），男，教授，博士，研究方向为桥梁钢结构及钢-混凝土组合结构，E-mail：we_star@163.com

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出版历程
- 收稿日期: 2017-04-21
- 修回日期: 2018-05-28
- 网络出版日期: 2018-12-21
- 刊出日期: 2019-10-01

Mechanical Behavior and Structural Optimization of Steel-Concrete Composite Cable-Pylon Anchor

XIAO Lin^1
,,
LIU Lifang¹,
WEI Xing^{1
, ,},
LIU Dejun²

摘要

摘要: 为了解斜拉桥钢-混组合索塔锚固结构的力学行为并对结构设计进行优化，以重庆嘉悦大桥为依托，通过足尺模型试验及非线性有限元分析的对比分析，对钢-混凝土组合索塔锚固结构的力学性能、荷载传递机理进行了研究；采用正交试验方法对索塔锚固区混凝土主拉应力进行参数敏感性分析，进而提出了结构优化设计参数. 研究结果表明：钢锚箱与混凝土塔壁的应力水平较低，应力分布均匀流畅；钢锚箱与混凝土塔壁的相对滑移值均很小，最大值仅0.029 mm；剪力键的抗剪刚度对混凝土端塔壁的主拉应力水平有较为显著的影响，当刚度增加5倍，混凝土端塔壁主拉应力减少了17.3%；该桥所采用的组合索塔锚固区结构参数是安全、经济的.
- 矮塔斜拉桥 /
- 索塔锚固结构 /
- 钢-混组合结构 /
- 模型试验 /
- 传力机理 /
- 优化分析
Abstract: Full-size model test and nonlinear finite element analysis (FEA) are carried out to investigate the mechanical behavior and optimize the structure design of the steel-concrete composite cable-pylon anchor of Jiayue Bridge, Chongqing. The mechanical performance and load transfer mechanism of the steel-concrete composite cable-pylon anchor are studied first by the model test comparing with the nonlinear FEA. Then, the optimized structural parameters of the composite cable-pylon anchor are analyzed by FEA. Results show that the stresses of components of cable-pylon anchor are on a low level and distribute evenly. The relative slippage between anchor box and concrete pylon is small, and the maximum value is only 0.029 mm. The stiffness of shear connectors has a great impact on the principle stress of concrete pylon. When the stiffness is increased by 5 times, the principle stress of concrete pylon is reduced by 17.3%. The cable-pylon anchor’s structural design of Jiayue Bridge meet the requirement of safety and economics.
- cable-stayed bridge with low pylons /
- cable-pylon anchor /
- steel-concrete composite structure /
- model test /
- mechanical behavior /
- optimization analysis

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图 1 索塔锚固区布置

Figure 1. Layout of cable-pylon anchorage

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图 2 钢锚箱结构

Figure 2. Layout of the steel anchorage box

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图 3 试验模型构造

Figure 3. Schematic of test model

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图 4 测点布置

Figure 4. Setup of measuring points

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图 5 有限元模型

Figure 5. Finite element model

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图 6 钢锚箱侧板实测值与计算值（单位：MPa）

Figure 6. Test and calculated stresses of longitudinal anchor plate（unit：MPa）

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图 7 钢锚箱端板应力测试值与有限元分析值（单位：MPa）

Figure 7. Test and FEA stresses on the end plate（unit：MPa）

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图 8 混凝土端壁应力的测试值与有限元分析值（单位：MPa）

Figure 8. Test and FEA stresses on the surface of end wall（unit：MPa）

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图 9 混凝土侧壁应力的测试值与有限元分析值（单位：MPa）

Figure 9. Test and FEA stresses on the surface of longitudinal wall（unit：MPa）

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图 10 栓钉剪力分布

Figure 10. Load distribution of studs

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图 11 钢锚箱与混凝土之间的荷载途径

Figure 11. The loading path between steel anchor box and concrete.

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表 1 因素水平表

Table 1. Levels of impact factors

因素	水平
因素	1	2	3	4	5
剪力键抗剪刚度/（kN•mm^–1）	100	200	300	400	500
侧板厚度/mm	20	30	40	50	60
剪力板厚度/mm	20	30	40	50	60

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表 2 试验方案及混凝土塔壁主拉应力计算结果

Table 2. Experimental scheme and calculated principal tensile stresses of concrete walls

试验号	试验值			混凝土塔壁主拉应力/MPa
试验号	a/（kN•mm^–1）	b/mm	c/mm	侧塔壁	端塔壁
1	100	20	20	11.134	6.100
2	100	30	30	11.045	5.530
3	100	40	40	10.937	5.231
4	100	50	50	10.818	5.042
5	100	60	60	10.701	4.903
6	200	20	30	10.862	5.485
7	200	30	40	10.793	4.909
8	200	40	50	10.723	4.595
9	200	50	60	10.642	4.399
10	200	60	20	10.64	4.871
11	300	20	40	10.704	5.13
12	300	30	50	10.656	4.583
13	300	40	60	10.612	4.279
14	300	50	20	10.621	4.749
15	300	60	30	10.606	4.426
16	400	20	50	10.608	4.886
17	400	30	60	10.575	4.369
18	400	40	20	10.560 4	4.772
19	400	50	30	10.599	4.382
20	400	60	40	10.574	4.137
21	500	20	60	10.548	4.706
22	500	30	20	10.447	4.944
23	500	40	30	10.548	4.437
24	500	50	40	10.57	4.135
25	500	60	50	10.558	3.929

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表 3 极差分析结果表

Table 3. Results of range analysis

指标平均值	混凝土侧塔壁最大主拉应力/MPa			混凝土端塔壁最大主拉应力/MPa
指标平均值	a	b	c	a	b	c
k₁	10.927	10.771	10.681	5.361	5.261	5.087
k₂	10.732	10.703	10.732	4.852	4.867	4.852
k₃	10.640	10.676	10.716	4.633	4.663	4.708
k₄	10.583	10.650	10.673	4.509	4.541	4.607
k₅	10.534	10.616	10.616	4.430	4.453	4.531
R	0.393	0.155	0.116	0.931	0.808	0.556

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表 4 混凝土端塔壁主拉应力方差分析结果表

Table 4. Results of variance analysis of principal tensile stress on the surface of concrete end walls

变异来源	变动平方和	自由度	均方根	F	F_0.05	F_0.01	显著性
因素a	2.788	4	0.697	256.372	6.39	15.98	显著
因素b	2.071	4	0.518	190.452			显著
因素c	0.97	4	0.242	89.165			显著
误差	0.022	4	0.003
总和	5.851

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参考文献(16)

崔冰,孟凡超,冯良平,等. 南京长江第三大桥钢塔柱设计与加工[J]. 中国铁道科学,2005,26(3): 42-47. doi: 10.3321/j.issn:1001-4632.2005.03.009

CUI Bing, MENG Fanchao, FENG Liangping, et al. Design and fabrication of the tower column of Nanjing No. 3 Yangtze river bridge[J]. China Railway Science, 2005, 26(3): 42-47. doi: 10.3321/j.issn:1001-4632.2005.03.009

周岺, 许春荣. 斜拉桥索-塔锚固结构形式的比较研究[C]//2004年全国桥梁学术会议. 昆明: 中国公路学会, 2004: 273-279

范立础. 世界最大跨径的斜拉桥-法国诺曼底(Normandy)大桥的设计及施工[J]. 重庆交通学院学报,1995,14(3): 1-8.

Fan Lichu. The design and construction of the world longest span cable stayed bridge Normandy bridge in France[J]. Journal of Chongqing Jiaotong Institute, 1995, 14(3): 1-8.

杨允表,吕忠达. 大跨度斜拉桥索塔锚固区钢-混凝土结构竖向受力机理的有限元法[J]. 工程力学,2008,25(12): 153-161.

YANG Yunbiao, LÜ Zhongda. A finite element method for vertical mechanics analysis of steel-concrete composite structure in pylon cable anchor zone of long span cable-stayed bridge[J]. Engineering Mechanics, 2008, 25(12): 153-161.

苏庆田,曾明根,吴冲. 上海长江大桥索塔钢锚箱模型试验研究[J]. 工程力学,2008,25(10): 126-132.

SU Qingtian, ZENG Minggen, WU Chong. Experiment study on steel-anchor-box of cable-pylon in Shanghai Yangtze river bridge[J]. Engineering Mechanics, 2008, 25(10): 126-132.

苏庆田,翟慧娜,吴冲. 济南黄河三桥索塔锚固区水平受力性能模型试验研究[J]. 桥梁建设,2008(3): 12-14.

SU Qingtian, ZHAI Huina, WU Chong. Model test study of horizontal load-bearing behavior of anchorage zone in cable pylon of the 3rd Jinan Huanghe river bridge[J]. Bridge Construction, 2008(3): 12-14.

肖林,叶华文,卫星,等. 斜拉桥桥塔钢-混结合段的力学行为和传力机理研究[J]. 土木工程学报,2014,47(3): 88-96.

XIAO Lin, YE Huawen, WEI Xing, et al. Study on mechanical behavior and load transfer mechanism of steel-concrete composite joint of cable-stayed bridge pylon[J]. China Civil Engineering Journal, 2014, 47(3): 88-96.

陈开利. 钢锚箱索塔锚固区受力机理[J]. 中国铁道科学,2008,29(4): 58-64.

CHEN Kaili. Mechanical mechanism of the steel anchor housing in the anchorage zones of the cable pylons[J]. China Railway Science, 2008, 29(4): 58-64.

汪昕,吕志涛. 斜向索荷载传递与分配关系分析力下钢混凝土组合索塔锚固区[J]. 东南大学学报,2006,36(4): 587-589.

WANG Xin, LÜ Zhitao. Analysis of load transferring and distribution in anchorage zone of steel-concrete composite pylon under inclined cable forces[J]. Journal of Southeast University, 2006, 36(4): 587-589.

刘钊,孟少平,吕志涛. 两座大型斜拉桥索塔锚固区模型试验及对比研究[J]. 中国工程科学,2003,5(12): 48-53. doi: 10.3969/j.issn.1009-1742.2003.12.008

LIU Zhao, MENG Shaoping, LÜ Zhita. Model test and comparative study of the pylon’s anchorage zone of two long-span cable-stayed bridges[J]. Engineering Science, 2003, 5(12): 48-53. doi: 10.3969/j.issn.1009-1742.2003.12.008

白光亮,蒲黔辉,袁万城,等. 栓钉在斜拉桥索塔锚固区中的试验研究与非线性分析[J]. 铁道学报,2009,31(3): 75-81. doi: 10.3969/j.issn.1001-8360.2009.03.014

BAI Guangliang, PU Qianhui, YUAN Wancheng, et al. Experimental research and FEM analysis of stud connectors in anchorage zone of pylon of cable-stayed bridge[J]. Journal of the China Railway Society, 2009, 31(3): 75-81. doi: 10.3969/j.issn.1001-8360.2009.03.014

OLLGAARD J G, SLUTTER R G, FISHER J W. Shear strength of stud connectors in lightweight and normal weight concrete[J]. AISC Enginneering Journal, 1971: 55-64.

LIN Xiao, LI Xiaozhen, MA Z J. Behavior of perforated shear connectors in steel-concrete composite joints of hybrid bridges[J]. Journal of Bridge Engineering. 2017, 22（4）: 04016135

肖林,卫星,强士中. 两类PBL剪力键推出试验的对比研究[J]. 土木工程学报,2013,46(11): 70-81.

XIAO Lin, WEI Xing, QIANG Shizhong. Comparative study on two kinds of push-out tests of PBL shear connector[J]. China Civil Engineering Journal, 2013, 46(11): 70-81.

ZHANG Qinghua, PEI Shiling, CHENG Zhenyu, et al. Theoretical and experimental studies of the internal force transfer mechanism of perfobond rib shear connector group[J]. Journal of Bridge Engineering. 2017, 22(4): 0000997

宋随弟,黄博,祝兵,等. 预应力PBL剪力键的承载能力试验研究[J]. 西南交通大学学报,2017,52(4): 647-654.

SONG Suidi, HAUNG Bo, ZHU Bing, et al. Analysis of the bearing capacity of PBL shear connector[J]. Journal of Southwest Jiaotong Uiversity, 2017, 52(4): 647-654.

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