Feasibility of Steel Fiber Concrete in End Zones of Posttensioned Bridge Girders: Results of Special Anchorage-Device Acceptance Test

Saif A. Haroon; Nur Yazdani; Kamal Tawfiq

首页> 外文期刊>Transportation Research Record >Feasibility of Steel Fiber Concrete in End Zones of Posttensioned Bridge Girders: Results of Special Anchorage-Device Acceptance Test

【24h】

Feasibility of Steel Fiber Concrete in End Zones of Posttensioned Bridge Girders: Results of Special Anchorage-Device Acceptance Test

机译：后张桥梁端部区域钢纤维混凝土的可行性：特殊锚固装置验收测试的结果

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

The secondary spiral and skin reinforcement in the anchorage zone of prestressed, posttensioned girders cause congestion and pose difficulty in the placement of concrete. Also, it is labor intensive to produce and place the secondary anchorage reinforcement. A study was conducted to determine the feasibility of reducing or eliminating the secondary reinforcement and replacing with steel fibers for posttensioned anchor zones because of the expected improvement in mechanical properties of fiber-reinforced concrete over nonfibrous concrete. The AASHTO special anchorage device acceptance test was performed. Variations of spiral and skin reinforcement, with concrete strengths ranging from 24 to 34.5 MPa (3,500 to 5,000 psi), were used to investigate the performance of the two types and various amounts of steel fibers. Experimental results indicated that 1% hooked-end steel fiber could reduce a maximum of 79% of the secondary reinforcement for a minimum concrete strength of 32.5 MPa (4,710 psi). Lower volumes of steel fibers may also result in reduction of secondary reinforcements.

机译：预应力后张大梁的锚固区中的二次螺旋和蒙皮加固会造成拥堵，并在混凝土浇筑时造成困难。而且，生产和放置次要锚固加强件是劳动密集型的。进行了一项研究，以确定减少或消除二次钢筋并用钢纤维代替后张锚固区域的可行性，因为预期纤维增强混凝土的机械性能优于非纤维混凝土。进行了AASHTO特殊锚固设备验收测试。螺旋强度和表皮增强强度的变化范围为24至34.5 MPa（3,500至5,000 psi），用于研究两种类型和不同数量的钢纤维的性能。实验结果表明，对于32.5 MPa（4,710 psi）的最小混凝土强度，1％的钩端钢纤维最多可以减少79％的二次钢筋。较少量的钢纤维也可能导致辅助钢筋的减少。

著录项

来源
《Transportation Research Record》 |2004年第1892期|p.117-125|共9页
作者
Saif A. Haroon; Nur Yazdani; Kamal Tawfiq;
展开▼
作者单位

Department of Civil and Environmental Engineering, Florida A&M University-Florida State University College of Engineering, 2525 Pottsdamer Street, Tallahassee, FL 32310;

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类交通运输;
关键词

相似文献

外文文献
中文文献
专利

1. Ambient vibration test-based deflection prediction of a posttensioned concrete continuous box girder bridge [J] . Tian Yongding, Li Panjie, Zhang Jian Structural Control and Health Monitoring . 2018,第2期

机译：后张混凝土连续箱梁桥基于环境振动试验的挠度预测
2. Innovative System for Curved Precast Posttensioned Concrete I-Girder and U-Girder Bridges [J] . Alawneh M., Tadros M., Morcous G. Journal of bridge engineering . 2016,第11期

机译：弯曲预制后张混凝土工字形和U型梁桥梁的创新系统
3. Structural Performance and Strength Prediction of Steel-to-Concrete Box Girder Deck Transition Zone of Hybrid Steel-Concrete Cable-Stayed Bridges [J] . Cheng Xi, Nie Xin, Fan Jiansheng Journal of bridge engineering . 2016,第11期

机译：钢混混凝土斜拉桥钢混凝土箱梁桥过渡区的结构性能及强度预测
4. USE OF STEEL FIBER REINFORCED CONCRETE IN ANCHORAGE ZONE OF POST-TENSIONED CONCRETE GIRDERS [C] . Kamal Tawfiq, Brenda Robinson, Nur Yazdani American Concrete Institute Convention . 2011

机译：钢纤维钢筋混凝土在后张紧混凝土梁锚固区
5. Live load test and computer modeling of a pre-cast concrete deck steel girder bridge and a cast-in-place concrete box girder bridge. [D] . Pockels, Leonardo. 2009

机译：预制混凝土甲板钢箱梁桥和现浇混凝土箱梁桥的活荷载测试和计算机建模。
6. Experimental Investigation of Impact Concrete Slab on the Bending Behavior of Composite Bridge Girders with Sinusoidal Steel Web [O] . Marcin Górecki, Krzysztof Śledziewski 2020

机译：冲击混凝土板对正弦钢腹板组合梁弯曲性能的试验研究。
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。
8. Continued Long-Term Monitoring of HAM-42-0992 and HAM-126-0881L: Instrumentation, Testing and Monitoring of Reinforced Concrete Deck-on-Steel Girder Bridges Final rept [R] . Helmicki, A., Hunt, V. 2005

机译：持续长期监测Ham-42-0992和Ham-126-0881L：钢筋混凝土桥梁钢梁桥的仪表，测试和监测

Feasibility of Steel Fiber Concrete in End Zones of Posttensioned Bridge Girders: Results of Special Anchorage-Device Acceptance Test

摘要

著录项

相似文献

相关主题

期刊订阅