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（西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）

［摘要］寶雞游泳跳水館屋蓋采用下弦為空間雙曲預(yù)應(yīng)力雙支拉索新型張弦梁結(jié)構(gòu)。為了探究該結(jié)構(gòu)的變形及受力特點(diǎn)，以1∶5的縮尺模型為試驗(yàn)對象，在下弦雙支拉索的兩端同時(shí)施加預(yù)應(yīng)力，使結(jié)構(gòu)達(dá)到預(yù)期的初始狀態(tài)，在此基礎(chǔ)上對結(jié)構(gòu)施加多種工況荷載進(jìn)行靜力分析，觀測結(jié)構(gòu)的整體變形和桿件的應(yīng)力響應(yīng)，并測試結(jié)構(gòu)的極限荷載。試驗(yàn)結(jié)果表明，寶雞游泳跳水館張弦梁結(jié)構(gòu)具有良好的整體變形能力和受力性能以及較高的安全儲備。

［關(guān)鍵詞］新型張弦梁結(jié)構(gòu)； 空間雙曲預(yù)應(yīng)力雙支拉索；  受力性能

中圖分類號：TU393.3   文獻(xiàn)標(biāo)識碼：A   文章編號：1002-848X(2015)02-0001-06

Experimental study on mechanical performance of newtype beam

string structure of Baoji Swimming and Diving Halls

Hao Jiping， Zhou Yang， Yu Jinguang， Deng Guangrui

 (School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:The roof of Baoji Swimming and Diving Halls adopts a newtype beam string structure, the bottom chord of which is spatial hyperbolic prestressed double cables. In order to study the mechanical and deformation behaviors of the structure, a 1∶5 scale model was taken as the experimental object. Prestress was exerted on both ends of the double cables in lower chord to make the structure reach the desirable initial state. On this basis, the structural static analysis was carried out under various loading cases. The structural overall deformation and stress responses of structural members were measured, and the ultimate load was tested. The experimental results show that the beam string structure of Baoji Swimming and Diving Halls has good overall deformation capacity, well mechanical performance and high security reserves.

Keywords:newtype beam string structure; spatial hyperbolic pre\|stressed double cables;  mechanical performance

*國家自然科學(xué)基金項(xiàng)目（51178381）。

作者簡介：郝際平，教授，博士生導(dǎo)師，Email：haojiping@xauat.edu.cn。

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