- 摘 要
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(中國民航大學(xué)機(jī)場學(xué)院, 天津 300300)
[摘要]荷載緩和裝置能緩和構(gòu)件內(nèi)力、自動(dòng)調(diào)整結(jié)構(gòu)形狀,實(shí)現(xiàn)結(jié)構(gòu)自我保護(hù)。介紹了一種新型荷載緩和裝置,給出了其在單向張弦梁結(jié)構(gòu)中的應(yīng)用,采用ANSYS有限元軟件對(duì)構(gòu)件內(nèi)力和結(jié)構(gòu)位移進(jìn)行了理論計(jì)算,討論了其對(duì)張弦梁結(jié)構(gòu)靜力性能的改進(jìn),并分析了桁架間距、跨度、預(yù)應(yīng)力值和彈性剛度系數(shù)對(duì)荷載緩和效果的影響。結(jié)果表明,荷載緩和裝置通過調(diào)整結(jié)構(gòu)形狀使結(jié)構(gòu)內(nèi)力重分布,降低桿件峰值內(nèi)力及受壓桿件內(nèi)力,充分利用材料強(qiáng)度,有效改善了單向張弦梁結(jié)構(gòu)靜力性能。該新型荷載緩和裝置拓展了荷載緩和體系的應(yīng)用范圍。
[關(guān)鍵詞]空間結(jié)構(gòu); 荷載緩和體系; 張弦梁結(jié)構(gòu); 靜力性能
中圖分類號(hào):TU393.3 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1002-848X(2014)04-0078-04
Static mechanical performance research of one-way beam string structure with load relieving system
Liu Guoguang, Wu Zhiwei, Yi Ying
(Airport College of Civil Aviation University of China, Tianjin 300300, China)
Abstract: Load relieving device can significantly relieve internal forces of structural components, automatically adjust structural shape and help structure achieve self-protection. A new type of load relieving device was introduced and is applied in a one-way beam string structure. Internal forces of structural components and structural displacements were calculated theoretically by using ANSYS finite element software. The improvement on the static mechanical performance on beam-string structure by using load relieving device was discussed. And influences of truss distance, span, prestress value and elastic stiffness coefficient on load relieving effect were conducted respectively. The results show that the structural internal forces are redistributed through the adjustment of the structural shape by load relieving device, in which the peak internal forces decrease as well as compression forces of truss components. The material strength is fully used and the structural static mechanical performance of one-way beam string structure is significantly improved. The new type of load relieving device extends the application area of the load relieving system.
Keywords: spatial structure; load relieving system; beam string structure; static mechanical performance
*國家自然基金面上項(xiàng)目(51178456),中國民航大學(xué)校級(jí)科研項(xiàng)目(2012KYE08),中央高校基本科研業(yè)務(wù)費(fèi)中國民航大學(xué)專項(xiàng)資助項(xiàng)目(3122013D010),中國民航大學(xué)青年骨干教師項(xiàng)目,中國民航大學(xué)實(shí)驗(yàn)室創(chuàng)新項(xiàng)目(011302)。
作者簡介:劉國光,碩士,講師,Email:ggliu@cauc.edu.cn。
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