周朝阳, 肖逸鹏, 何畅,等.斜拉桥非对称V形钢塔-混凝土基座结合部构造设计优化[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023040040.

ZHOU C Y, XIAO Y P, HE C, et al.Design optimization of joint between asymmetric V-shaped steel tower and concretebase for a cable-stayed bridge[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023040040.

斜拉桥非对称V形钢塔-混凝土基座结合部构造设计优化（网络首发）

周朝阳1, 肖逸鹏1, 何畅1, 王兴国2

1.中南大学 土木工程学院，湖南 长沙  410075;2.河南理工大学 土木工程学院，河南 焦作  454000

摘要:某空间异型斜拉桥主塔钢柱与斜撑在底部形成非对称V形结构，钢构件轴线严重偏离下 部混凝土基座顶面垂线，前期为此选定的钢-混结合部构造方案中众多参数有待确定。基于精 细化非线性有限元模拟，通过改变参数取值，对多种典型工况下各部件的应力进行分析、对比 及验算。研究结果表明：张拉4索的施工极端工况和平面内外弯矩绝对值相加最大的使用工 况最为关键，基座混凝土主拉应力常起控制作用，塔根应力比较接近规范限值；加厚承压板、提 高混凝土强度有利于控制锚箱钢板和基座混凝土应力，但按性价比，适中即可；原方案锚箱中 部纵横向钢板作用很小；锚杆布置位置合理远比数量重要，在弯矩作用下的受拉侧施加预应力 能够起到有益作用。最终优化方案大量减少了锚箱钢板块数和锚杆根数，预应力分布也更适 当。研究成果兼顾安全、适用和经济，对相关工程具有借鉴意义。

关键词:斜拉桥;钢-混结合部;设计优化;有限元模拟

中图分类号：U448.27

doi:10.16186/j.cnki.1673-9787.2023040040

基金项目:国家自然科学基金资助项目（51878664）；长沙市政府采购研究项目（CSCC-202107060066）

收稿日期:2023-04-20

修回日期:2023-06-16

网络首发日期:2023-07-12

Design optimization of joint between asymmetric V-shaped steel tower and concretebase for a cable-stayed bridge（Online）

ZHOU Chaoyang1, XIAO Yipeng1, HE Chang1, WANG Xingguo2

1.School of Civil Engineering， Central South University，Changsha  410075，Hunan，China;2.School of Civil Engineering， Henan Polytechnic University，Jiaozuo  454000，Henan，China

Abstract:An asymmetric V-shaped steel structure forms due to the intersection of a tall column and a pillar both inclined at the bottom of the main tower of a special-shaped cable-stayed bridge，and the axis of the steel member is seriously deviated from the vertical line of the top surface of the lower concrete base. Many parameters need to be determined for the scheme of steel-concrete joint selected earlier. Based on the refined nonlinear finite element simulation，the stresses of each component under a variety of typical loading case were analyzed，compared and checked by changing the parameter values. The results show that there are two most critical loading cases，which are the extreme loading case of tensioning 4 cables and the maxi⁃mum sum of the absolute values of in-plane and out-of-plane bending moments.The main tensile stresses ofthe concrete base often plays a controlling role，and the stresses of the tower root were close to the standard limit.Thickening the bearing plate and improving the strength of concrete are beneficial to controlling thestresses of anchor box steel plate and base concrete，but to consider the cost，moderate on the line.In theoriginal scheme，the transverse and vertical steel plate in the middle of the anchor box has little effect.Reasonable arrangement of bolts is far more important than quantity，and prestress applied on the tensile sideunder the action of bending moment can play a beneficial role. The final optimization scheme greatly reduces the number of anchor box steel plates and anchor rods，and the prestress distribution is more appropriate.The research results take into account safety，applicability and economy，and have reference significance for related projects.

Key words:cable-stayed bridge;steel-concrete joint;design optimization;finite element simulation

CLC：U448.27