Mitigation of Seismic Induced Diagonal Cracks in Concrete Columns by External Prestressing

机译：外部预应力减轻混凝土柱地震诱发的对角线裂缝

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A new technology was developed for controlling diagonal shear cracking in earthquake resistant concrete bridge columns. The technology consists of external prestressing columns in transverse direction by means of individual hoops consisting of prestressing strands and specially designed anchors. It is especially suitable for seismic retrofitting circular bridge columns against shear. The technology was verified through experimental investigation of shear deficient columns. Three full-scale columns were tested under constant axial compression and incrementally increasing lateral deformation reversals. The results, presented and discussed in the paper, indicate that the technique can control diagonal cracking, thereby suppressing shear failure and promoting flexural behavior. A design procedure is also presented for seismic retrofit of shear-deficient columns.

机译：开发了一种新技术来控制抗震混凝土桥梁柱的斜向剪切开裂。该技术由横向的外部预应力柱组成，这些预应力柱由单独的箍组成，箍由预应力绞线和特殊设计的锚固件组成。它特别适用于抗剪加固圆形桥梁柱的抗震改造。通过对剪切不足柱的实验研究验证了该技术。在恒定的轴向压缩和递增的横向变形逆转下测试了三个全尺寸柱。在本文中介绍和讨论的结果表明，该技术可以控制对角线开裂，从而抑制剪切破坏并促进弯曲行为。还提出了抗剪柱抗震改造的设计程序。

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来源
《Symposium on Design and Construction Practices to Mitigate Cracking, 2001》|2001年|p.195-216|共22页
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作者
M. Saatcioglu;
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作者单位

structural engineering at the University of Ottawa, Ottawa, Canada;

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原文格式 PDF
正文语种 eng
中图分类建筑科学;
关键词
bridge columns; bridges; concrete columns; crack control; cracking; earthquake engineering; prestressed concrete; prestressing; retrofitting; seismic retrofit; shear design;

机译：桥柱；桥梁混凝土柱；裂纹控制破裂地震工程；预应力混凝土;预应力翻新；抗震改造；剪切设计;

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专利

1. Seismic Performance And Design Of Rc Columns Retrofitted By PC Bar Prestressing As External Hoops [J] . Tetsuo Yamakawa, Shigeyoshi Kamogawa, Masayoshi Kurashige 日本建築学会构造系論文集 . 2000,第537期

机译：PC棒预应力作为外部箍的钢筋混凝土柱的抗震性能和设计
2. AN EXPERIMENTAL STUDY ON THE SEISMIC RETROFIT TECHNIQUE FOR RC COLUMNS CONFINED WITH PC BAR PRESTRESSING AS EXTERNAL HOOPS [J] . TESUO YAMAKAWA 日本建築学会构造系論文集 . 1999,第526期

机译：PC棒预应力约束钢筋混凝土柱地震改造技术的试验研究。
3. Strength-Ductility Type Seismic Retrofit Technique of RC Column with Thick Hybrid Wing-wall using Additional Concrete Sandwiched by Steel Plates and PC bar Prestressing: Part 1 Discussion on Flexural Strength [J] . NOORI Mohammad Zahid, NAKADA Kozo, YAMAKAWA Tetsuo, 日本建築学会大会学術講演梗概集 . 2019,第2019期

机译：用钢板夹层夹层和PC酒吧预应力用厚混凝土用厚混凝土轧件RC色谱柱强度 - 延展性型地震改装技术：第1部分探讨弯曲力量
4. Mitigation of Seismic Induced Diagonal Cracks in Concrete Columns by External Prestressing [C] . M. Saatcioglu, American Concrete Institute, International SP-204 American Concrete Institute symposium on design and construction practices to mitigate cracking . 2001

机译：外部预应力在混凝土柱中抗震诱导对角线裂缝的减轻
5. Seismic Retrofit of Reinforced Concrete Frames with Diagonal Prestressing Cables. [D] . Molaei, Ali. 2014

机译：用对角预应力电缆对钢筋混凝土框架进行抗震改造。
6. The Application of Ni–Ti SMA Wires in the External Prestressing of Concrete Hollow Cylinders [O] . Aleksandra Dębska, Piotr Gwoździewicz, Andrzej Seruga, 2021

机译：Ni-Ti SMA线在混凝土空心缸外预应力中的应用
7. Numerical Analytical Model for Seismic Behavior of Prestressing Concrete Bridge Column Systems [O] . Wang Zhiqiang, Song Wei, Wang Yuanyuan, 2011

机译：预应力混凝土桥柱系统抗震性能的数值分析模型
8. Seismic Response of Column/Cap Beam Tee Connections with Cap Beam Prestressing [R] . Sritharan, S., Priestley, M. J. N., Seible, F. 1996

机译：带帽梁预应力柱/帽梁三通的地震反应分析

Mitigation of Seismic Induced Diagonal Cracks in Concrete Columns by External Prestressing

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