[1]张玉平,谭 理,李传习,等.带PBL剪力键的钢-UHPC组合桥面板横桥向负弯性能[J].长安大学学报(自然科学版),2025,45(2):111-125.[doi:10.19721/j.cnki.1671-8879.2025.02.010]
　ZHANG Yu-ping,TAN Li,LI Chuan-xi,et al.Transverse negative bending performance of steel-UHPC composite bridge deck with PBL shear keys[J].Journal of Chang’an University (Natural Science Edition),2025,45(2):111-125.[doi:10.19721/j.cnki.1671-8879.2025.02.010]
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带PBL剪力键的钢-UHPC组合桥面板横桥向负弯性能()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年2期
页码:
111-125
栏目:
桥梁与隧道工程
出版日期:
2025-03-31

文章信息/Info

Title:
Transverse negative bending performance of steel-UHPC composite bridge deck with PBL shear keys
文章编号:
1671-8879(2025)02-0111-15
作者:
张玉平1; 谭 理2; 李传习1; 贺龙飞1; 施 宇2; 潘仁胜1
(1. 长沙理工大学 桥梁工程安全控制教育部重点实验室,湖南 长沙 410114; 2. 长沙理工大学 土木工程学院,湖南 长沙 410114 )
Author(s):
ZHANG Yu-ping1;  TAN Li2;  LI Chuan-xi1;  HE Long-fei1;  SHI Yu2;  PAN Ren-sheng1
(1. Key Laboratory of Bridge Engineering Safety Control, Ministry of Education, Changsha University of Technology, Changsha 410114, Hunan, China; 2. School of Civil Engineering,Changsha University of Technology, Changsha 410114, Hunan, China)
关键词:
桥梁工程;  钢-UHPC组合桥面板;  足尺模型;  有限元模拟;  横向受弯;  界面滑移;  特别裂宽荷载
Keywords:
bridge engineering;  steel-UHPC composite bridge deck;  full-scale model;  finite element simulation;  transverse bending;  interface slip;  special crack width load
分类号:
U443.32
DOI:
10.19721/j.cnki.1671-8879.2025.02.010
文献标志码:
A
摘要:
基于某特大跨组合梁斜拉桥的桥面板受力特点,提出一种带纵向开孔板(PBL)剪力键的钢-超高性能混凝土(UHPC)组合桥面板结构形式。为研究此结构横桥向受弯性能,进行了2块钢-UHPC组合板足尺模型的静载横桥向弯曲试验和数值模拟,得到带纵向PBL剪力键的钢-UHPC组合桥面板(受拉上层纵筋配筋率为0.89%)在各级受弯静载下的应变、跨中挠度、相对滑移、裂缝宽度、开裂形态及其发展规律,探讨受压钢板厚度、纵向受拉钢筋配筋率等重要参数对组合桥面板横向抗负弯性能的影响。研究结果表明:开裂荷载约为极限荷载的34%,裂缝主要产生于0.5P～0.8P加载过程中(P为荷载),UHPC产生裂缝后仍能为结构提供部分刚度; 在受负弯过程中,PBL剪力键与UHPC能牢固连接,钢板与UHPC间的纵向滑移对结构整体刚度影响非常小; 在正常受拉纵筋率(不低于0.89%)下,组合桥面板的UHPC裂缝宽度达到0.1 mm的荷载(特别裂宽荷载)为开裂荷载1.65倍～1.75倍; 当组合桥面板达到负弯矩承载力状态时,UHPC外层平均拉应力约为抗拉强度的95.6%,达到极限承载力后,组合桥面板仍具有良好的延性; 平钢板与UHPC板两界面黏结失效后,PBL剪力键能够有效阻止两者继续产生纵向相对位移(相对滑移很小,未超过0.04 mm); 新型组合桥面板抗负弯性能主要取决于UHPC层和受拉钢筋的抗拉能力,几乎不受钢板厚度的影响。
Abstract:
Based on the stress characteristics of the bridge deck of a super-large span composite girder cable-stayed bridge, a steel-ultra-high performance concrete(UHPC)composite bridge deck structure with longitudinal perforated plate(PBL)shear keys was proposed. To study the transverse bending performance of this structure, the static load transverse bending tests and numerical simulation of full-scale models of two steel-UHPC composite bridge deck were carried out, and the strain, mid-span deflection, relative slip, crack width, cracking morphology and its development law of the steel-UHPC composite bridge deck with longitudinalPBL shear keys(the tensile upper longitudinal reinforcement ratio was 0.89%)were obtained under bending static load at all levels. The influences of important parameters such as the thickness of compressed steel plate, the longitudinal tensile reinforcement ratio on the transverse negative bending performance of the composite bridge deck were studied.The results show that the cracking load is about 34% of the ultimate load, and cracks are mainly generated during the loading process of 0.5P-0.8P(P is the load). UHPC can still provide partial stiffness to the structure after cracking. In the process of negative bending, the PBL shear key can be firmly connected with UHPC, and the longitudinal slip between the steel plate and UHPC has little effect on the overall stiffness of the structure. Under the normal tensile longitudinal reinforcement ratio(not less than 0.89%), the load of UHPC crack width of 0.1 mm(special crack width load)of the composite bridge deck is 1.65-1.75 times of the cracking load. When the composite bridge deck reaches the state of negative moment bearing capacity, the average tensile stress of the UHPC outer layer is about 95.6% of the tensile strength. After reaching the ultimate bearing capacity, the composite bridge deck still has good ductility. After the bond between the flat steel plate and the UHPC plate, the PBL shear key can effectively prevent the longitudinal relative displacement of the two(the relative slip is very small, not exceeding 0.04 mm). The negative bending performance of the new composite bridge deck mainly depends on the tensile capacity of the UHPC layer and the tensile reinforcement, and is almost not affected by the thickness of the steel plate.7 tabs, 23 figs, 30 refs.

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备注/Memo

备注/Memo:
收稿日期:2024-09-01
基金项目:国家自然科学基金项目(52078059,51808055); 湖南省交通科技项目(202016); 湖南省教育厅优秀青年项目(18B131)
作者简介:张玉平(1976-),男,辽宁建平人,副教授,工学博士,E-mail:zyp5032@163.com。
通信作者:李传习(1963-),男,湖南衡阳人,教授,博士研究生导师,E-mail:lichuanxi2@163.com。
更新日期/Last Update: 2025-04-01