- 摘 要
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（1 南京林業(yè)大學(xué)土木工程學(xué)院，南京 210037； 2 東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室，南京 210096；3 北京特希達(dá)技術(shù)研發(fā)有限公司，北京 100011）
［摘要］提出了繞絲加固混凝土柱的加固工藝，進(jìn)行了15個(gè)混凝土柱的軸壓試驗(yàn)，其中3個(gè)為對比試件，12個(gè)為繞絲加固混凝土柱，繞絲間距為10，20，30，40mm。試驗(yàn)結(jié)果表明，繞絲加固混凝土可顯著提高混凝土柱的峰值應(yīng)力及其對應(yīng)的峰值應(yīng)變，隨著繞絲間距的減小，峰值應(yīng)力及峰值應(yīng)變逐漸增大；繞絲加固混凝土柱的破壞表現(xiàn)為鋼絲繩的逐次分批斷裂，其破壞歷程長，破壞模式緩和，是一種延性的破壞。建議了繞絲加固混凝土柱的承載力計(jì)算模型，對比結(jié)果表明，建議模型計(jì)算結(jié)果與試驗(yàn)結(jié)果總體符合較好。
［關(guān)鍵詞］加固; 約束混凝土; 繞絲; 軸心受壓; 承載力
中圖分類號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2014)11-0020-05
Experiment on axial compressive behavior and calculation on load carrying capacity of concrete columns strengthened by winding steel wire ropes
Wei Yang1,2, Wu Gang2, Zhang Min3
(1 College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2 Key Laboratory for RC and PRC Structures of Education Ministry, Southeast University, Nanjing 210096, China; 3 Beijing Texida R&D Co., Ltd., Beijing 100011, China)
Abstract: The strengthening technology of concrete columns by winding steel wire ropes was provided and 15 concrete columns were tested under axial compressive test, in which 3 columns were used for comparison and 12 columns were strengthened by winding steel wire ropes with different winding spacing (10, 20, 30, 40mm). The test results show that winding steel wire ropes can significantly improve the peak stress and the corresponding peak strain of the concrete columns. The peak stress and the peak strain increase when the winding spacing decreases. The failure mode of specimens strengthened by winding steel wire ropes shows as progressive fractures of steel wire ropes in batches. The failure process is endurable and mild, and the failure behavior is ductile. The model to calculate the load carrying capacity was proposed for concrete columns strengthened by winding steel wire ropes. The comparisons indicate that the proposed model results are in good agreement with the test results.
Keywords: strengthening; confined concrete; winding steel wire rope; axial compression; load carrying capacity
*國家自然科學(xué)基金（51208262），交通部西部交通建設(shè)科技項(xiàng)目(201131816980),江蘇高校優(yōu)勢學(xué)科建設(shè)工程資助項(xiàng)目（PAPD）。
作者簡介：魏洋，博士，副教授，一級注冊結(jié)構(gòu)工程師，Email：wy78@njfu.edu.cn。
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