预制拼装桥墩的抗震性能是桥梁工业化技术的研究热点之一。在预制拼装桥墩的设计中，采用高强钢筋替代普通强度的钢筋，可以减少钢筋用量，加快接缝面的钢筋连接速度，然而，其抗震性能需要进一步研究。为对比钢筋强度对预制拼装墩柱的抗震性能影响，制作了2个具有相同尺度的混凝土试件，分别配置高强钢筋（HRB600E）和普通强度钢筋（HRB400），开展滞回加载试验研究。结果表明：采用高强钢筋的预制拼装桥墩，具有较大的等效屈服强度和极限强度，且在塑性阶段，其极限位移和屈服后位移角增量也显著增加，同时，其较小的滞回耗能和残余位移，表明这种桥墩具有较小的塑性损伤和较好的自恢复性能；采用高强钢筋的预制拼装桥墩的刚度退化速度较为缓慢，残余刚度大，有利于震后应急通行和修复。最后，本文还对高强钢筋与普通强度混凝土在预制拼装桥墩中的联合使用进行了合理性论证。研究成果可为预制拼装桥墩抗震设计提供参考。
Abstract
Seismic performance of precast bridge piers is one of the most researched topics in the field of industrialized construction. In the design of precast bridge piers, implementing high-strength rebar to replace conventional steel rebar can reduce reinforcement quantity and accelerate the operation of connecting the steel rebar through the joint surface. However, its seismic performance needs to be further studied. To compare the impact of rebar strength on seismic performance of precast piers, two pier specimens were fabricated with the same geometry and concrete grade and reinforced with high-strength rebar (HRB600E) and conventional strength rebar (HRB400), respectively. Then, hysteretic loading tests of the two piers were conducted and their results were compared. The research results demonstrate that the precast pier reinforced with high-strength rebar has a larger equivalent yield strength and ultimate strength. While in the plastic stage, ultimate displacement and post-yielding drift increment extends significantly. Simultaneously, the lower energy dissipation and residual displacement indicate that these types of bridge piers have less plastic damage and better resilience performance. Compared to the precast pier with conventional rebar, the stiffness degradation rate of precast bridge piers with high-strength rebar is lower and the residual stiffness increases, which facilitate emergency traffic operation and rehabilitation. Finally, a discussion is also made on the practicality of the combined use of high-strength rebar and medium-strength concrete in precast piers. The findings in this paper help in the design of seismically resilient precast piers with different rebar strengths.
关键词
桥梁工程 /
预制桥墩 /
试验研究 /
抗震设计 /
高强钢筋 /
抗震自恢复性 /
滞回耗能
{{custom_keyword}} /
Key words
bridge engineering /
precast pier /
experimental study /
seismic design /
high-strength rebar /
seismic resilience /
hysteretic energy
{{custom_keyword}} /
中图分类号：
U443.22
{{custom_clc.code}}
({{custom_clc.text}})
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] BELLERI A, RIVA P. Seismic Performance and Retrofit of Precast Concrete Grouted Sleeve Connections[J]. PCI Journal, 2012, 51(1):97-109.
[2] HABER Z B, SAⅡDI M, SANDERS D H. Seismic Performance of Precast Column with Mechanically Spliced Column-footing Connection[J]. ACI Structural Journal, 2014, 111(3):639-650.
[3] HABER Z B. Precast Column-footing Connections for Accelerated Bridge Construction in High Seismic Zones[D]. Reno:University of Nevada at Reno, 2013.
[4] 王志强,卫张震,魏红一,等.预制拼装联接件形式对桥墩抗震性能的影响[J].中国公路学报,2017,30(5):74-80. WANG Zhi-qiang, WEI Zhang-zhen, WEI Hong-yi, et al. Influences of Precast Segmental Connector Forms on Seismic Performance of Bridge Pier[J]. China Journal of Highway and Transport, 2017, 30(5):74-80.
[5] MOTAREF S. Seismic Response of Precast Bridge Columns with Energy Dissipating Joints[D]. Reno:University of Nevada at Reno, 2011.
[6] OUSALEM H, TAKATSU H, ISHIKAWA Y, et al. Use of High-strength Bars for the Seismic Performance of High-strength Concrete Columns[J]. Journal of Advanced Concrete Technology, 2009, 7(1):123-134.
[7] RAUTENBERG J M, PUJOL S, TAVALLALI H, et al. Reconsidering the Use of High-strength Reinforcement in Concrete Columns[J]. Engineering Structures, 2012, 37(4):135-142.
[8] NEHRP Consultants Joint Venture. Use of High-strength Reinforcement in Earthquake-resistant Concrete Structures[R]. Gaithersburg:National Institute of Standards and Technology (NIST), 2014.
[9] 戎贤,张健新,李艳艳.高强钢筋混凝土桥墩抗震性能试验研究与分析[J].工程力学,2015,32(10):99-105. RONG Xian, ZHANG Jian-xin, LI Yan-yan. Experimental Study and Analysis on Aseismic Performance of High Strength Reinforcement Concrete Bridge Piers[J]. Engineering Mechanics, 2015, 32(10):99-105.
[10] 王君杰,苏俊省,王文彪,等.配置HRB500E,HRB600钢筋的混凝土圆柱抗震性能试验[J].中国公路学报,2015,28(5):93-100,107. WANG Jun-jie, SU Jun-sheng, WANG Wen-biao, et al. Experiment on Seismic Performance of Circular Concrete Columns Reinforced with HRB500E, HRB600 Steel[J]. China Journal of Highway and Transport, 2015, 28(5):93-100, 107.
[11] 张萍,陈晓磊,薛松,等.配置高强钢筋混凝土柱抗震性能试验研究[J].结构工程师,2017,33(3):147-155. ZHANG Ping, CHEN Xiao-lei, XUE Song, et al. Experimental Study on Seismic Performance of Concrete Columns Reinforced with High-strength Steel[J]. Structural Engineers, 2017, 33(3):147-155.
[12] OU Y C, TSAI M S, CHANG K C, et al. Cyclic Behavior of Precast Segmental Concrete Bridge Columns with High Performance or Conventional Steel Reinforcing Bars as Energy Dissipation Bars[J]. Earthquake Engineering & Structural Dynamics, 2010, 39(11):1181-1198.
[13] GB/T 50152-2012,混凝土结构试验方法标准[S]. GB/T 50152-2012, Standard for Test Method of Concrete Structures[S].
[14] ZHUO W D, LIU Z, ZHANG J D, et al. Comparison Study on Hysteretic Energy Dissipation and Displacement Components Between Cast-in-place and Precast Piers with High-strength Bars[J]. Structural Concrete, 2018, 19(3):747-757.
[15] PARK R. Evaluation of Ductility of Structures and Structural Assemblages from Laboratory Testing[J]. Bulletin of the New Zealand National Society for Earthquake Engineering, 1989, 22(3):155-166.
[16] PARK Y J, ANG A H S. Mechanistic Seismic Damage Model for Reinforced Concrete[J]. Journal of Structural Engineering, 1985, 111(4):722-739.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
基金
国家重点研发计划项目（2017YFC0806009）；江苏省交通运输科技项目（2014Y01）；江苏高校优势学科建设工程项目（1105007002）
{{custom_fund}}
{{custom_fund}}
PDF全文下载(2776 KB)
