A Study on the Strengthening of ASR Damaged Concrete Piers Using Prestressing Steel Wires

预应力钢丝加固ASR损伤混凝土桥墩的研究

基本信息

批准号：
09650504
负责人：
TORII Kazuyuki
金额：
$ 1.73万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

A new strengthening method with prestressing steel wires, which is named the PC confined method, has been developed especially for ASR damaged RC piers. Reinforced concrete columns, 300 mm in diameter and 900 mm high, were prepared in order to examine the effects of the prestressing force around the concrete column on the confinement of the cracks of concrete due to alkali-silica reaction and on the improvement of load-carrying capacity and ductility of damaged concrete columns.From the experimental results, it was concluded that the prestressing force given around the concrete column could effectively confine the cracks due to ASR and decrease the expansion of concrete. Thus, it was found that both the strength and ductility of damaged RC column was much improved by PC confined method. Based on the results of the laboratory test, the PC confined method was successfully adopted in the strengthening for ASR damaged RC piers of the Toyokawa bridge and the Kumakigawa bridge in Noto peninsula in Ishikawa prefecture in 1997 and 1998, respectively. The measurements on changes with time in the stress and strain of concrete in the piers of the Toyokawa bridge after strengthening by PC confined method are now monitored.

已经为ASR损坏的RC Piers开发了一种用预应力钢丝的新的加强方法，该方法被称为PC限制方法。准备了钢筋混凝土柱，直径为300毫米，高900毫米，以检查混凝土柱周围的预应力对碱性 - 硅利 - 硅利反应以及对损坏的混凝土柱的载荷能力和固定性的改善而导致的混凝土能力和降低的混凝土柱的影响。可以有效地限制由于ASR引起的裂纹并减少混凝土的膨胀。因此，发现被PC的限制方法大大改善了受损RC柱的强度和延展性。根据实验室测试的结果，在1997年和1998年，在Ishikawa县Noto Peninsula的Toyokawa Bridge的ASR损坏的RC Piers和Noto Peninsula的Kumakigawa桥的加强中成功地采用了PC限制方法。现在监视了Toyokawa桥墩的压力和混凝土应力中随时间变化的测量值。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Kazuyuki Torii, Yasunori Okuda, Kouji Ishii, Kinya Kubo: "Strengthening Method with Prestressing Steel Wires for ASR-damaged Reinforced Concrete Columns" Proc.of the 2nd Inter.RILEM/CSIRO/ACRA Conf.on Rehabilitation of Structures, Melbourne. 38-47 (1998)

Kazuyuki Torii、Yasunori Okuda、Kouji Ishii、Kinya Kubo：“针对 ASR 损坏的钢筋混凝土柱的预应力钢丝加固方法”Proc.of the 2nd Inter.RILEM/CSIRO/ACRA Conf.on Rehabilitation of Structures，墨尔本。