- 摘 要
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(1 河南大學鋼與空間結(jié)構(gòu)研究所, 開封 475004; 2 開封天元網(wǎng)架工程有限公司, 開封 475004 )
[摘要]針對傳統(tǒng)螺栓球網(wǎng)架滑動支座由于支座底板與下部預埋板之間摩擦力較大以及生銹等原因?qū)е轮ё静荒芑瑒拥膯栴},提出了一種新型單向滑動網(wǎng)架支座。設計了該新型單向滑動支座的構(gòu)造,分析了其工作原理及優(yōu)點,并進行了有限元模擬和試驗研究。研究結(jié)果表明:在極限荷載作用下,支座肋板首先發(fā)生屈曲破壞,此時支座底部聚四氟乙烯板壓應力為26MPa,小于容許應力,能夠滿足使用要求。試驗測得支座底部聚四氟乙烯板和不銹鋼板之間摩擦系數(shù)為007左右,表明這種新型單向滑動網(wǎng)架支座摩擦力很小,而且不易生銹,很好地解決了傳統(tǒng)支座遇到的問題。
[關(guān)鍵詞]網(wǎng)架結(jié)構(gòu); 滑動支座; 聚四氟乙烯; 有限元; 試驗
中圖分類號:TU391.TU356 文獻標識碼:A 文章編號:1002-848X(2015)03-0063-05
Finite element simulation and experimental study on a new unidirectional
sliding bearing for grid structures
Zhu Zhenghao1, Du Wenfeng1, Liu Zhijian2
(1 Institute of Steel &Space Structure, Henan University, Kaifeng 475004, China;
2 Kaifeng TianYuan Space Frame Engineering Co., Ltd., Kaifeng 475004, China)
Abstract:A new unidirectional sliding bearing for grid structures was proposed in order to solve the slide problem of the traditional boltball sliding bearing for grid structures due to the rust and large friction between the upper covering plate and the lower embedded plate. The details of the new sliding bearing were designed and introduced as well as its working principles and advantages. Finite element simulation analysis and experimental study were carried out. The results show that the bearing ribs will buckle first under the ultimate loads with compression stress of 26MPa for PTFE plate at bottom bearing which is less than allowable stress and meets the requirements for application. Experimental results show that the friction coefficient between PTFE plate and stainless steel plate is about 007, which indicates that the friction of this new sliding bearing is small and there is no rust, and that the new bearing solves the problems encountered in traditional bearings.
Keywords:grid structure; sliding bearing; PTFE; finite element; experiment
*國家自然科學基金項目(U1304527),河南省產(chǎn)學研合作項目(122107000004)。
作者簡介:朱正浩,碩士,Email:1026597658@qq.com。
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