FRP復(fù)合材料橫擔(dān)體系空間受力性能足尺試驗(yàn)研究*
馬輝1，劉云賀1，王振山1，郭宏超1，譚蓉2
- 摘 要
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（1 西安理工大學(xué)土木建筑工程學(xué)院，西安 710048； 2 陜西省電力設(shè)計(jì)院，西安 710054）
［摘要］為研究FRP復(fù)合材料橫擔(dān)在三向荷載作用下的空間受力性能，結(jié)合某輸電線路FRP復(fù)合材料塔架，對(duì)FRP復(fù)合材料橫擔(dān)進(jìn)行了三向荷載作用下的足尺試驗(yàn)，觀察了試驗(yàn)過程及現(xiàn)象，分析了FRP復(fù)合材料橫擔(dān)體系的荷載-位移關(guān)系曲線，并對(duì)橫擔(dān)梁和拉索中鋼套管和FRP復(fù)合材料的應(yīng)變變化規(guī)律進(jìn)行了研究。結(jié)果表明：鋼套管與FRP復(fù)合材料具有良好的粘結(jié)性，F(xiàn)RP復(fù)合材料之間出現(xiàn)輕微撕裂但并未發(fā)生破壞；橫擔(dān)梁中部截面外鼓變形，拉索側(cè)向變形很明顯。橫擔(dān)梁的荷載-位移關(guān)系基本成線性變化，F(xiàn)RP復(fù)合材料橫擔(dān)體系的荷載富余度系數(shù)約為4.0，表現(xiàn)出較好的受力性能。橫擔(dān)梁及拉索的鋼套管應(yīng)變均小于FRP復(fù)合材料的應(yīng)變，F(xiàn)RP復(fù)合材料同一截面應(yīng)變分布較為均勻。拉索較橫擔(dān)梁更容易發(fā)生破壞，設(shè)計(jì)時(shí)應(yīng)對(duì)拉索進(jìn)行一定的加強(qiáng)處理。研究結(jié)論將為FRP復(fù)合材料橫擔(dān)的推廣應(yīng)用提供技術(shù)參考。［關(guān)鍵詞］FRP復(fù)合材料; 三向荷載; 橫擔(dān)體系; 輸電塔架; 受力性能; 足尺試驗(yàn)中圖分類號(hào)：TU389.9，TU371.1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2016)04-0068-06
Full-scale experiment research on space mechanical properties of FRP-composite material cross arm systemMa Hui1, Liu Yunhe1, Wang Zhenshan1, Guo Hongchao1, Tan Rong2(1 School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; 2 Shannxi Electric Power Design Institute, Xi'an 710054, China)Abstract: Combined with the FRP composite material transmission tower, a full scale experimental study on mechanical properties of the FRP composite cross arm system under three-way loads was performed in order to research space mechanical properties of FRP composite material cross arm system under three-way loads. The experiment process and phenomena were observed. The loaddisplacement curve of composite material cross arm system was analyzed. Strain change laws of steel casing and FRP composite material in the cross arm beam and inhaul cables were also investigated. The research results show that the junction surface between the steel casing and FRP composite material has good bonding and some slight avulsion between the FRP material layers is also observed though without damage. The middle cross-section deformation of the cross arm beam is large and the lateral displacement of inhaul cables is very obvious. The load-displacement curve of cross arm features linear variation rule and the load rich degree coefficient of composite material cross arm system is about 4.0, which shows that has a good mechanical performance. The strain values of steel casing in the cross arm beam and inhaul cables are less than the strain of FRP composite material and the strain distribution in the same section of FRP composite materials is approximate homogeneous. Compared with the cross arm beam, the inhaul cable is prone to damage. Therefore, some strengthening measures need to been taken in the inhaul cables. The research results will provide the technical reference for the design and application of composite materials cross arm.Keywords:FRP composite material; three-way loading; cross arm system; transmission tower; mechanical property; full-scale test
*國(guó)家自然科學(xué)基金(51408485)，陜西電力設(shè)計(jì)院資助項(xiàng)目，西安市建設(shè)科技項(xiàng)目(SJW2014025)，西安理工大學(xué)科研啟動(dòng)基金項(xiàng)目(118-211310)。作者簡(jiǎn)介：馬輝, 博士, 副教授, Email: mahuiwell@163.com。
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