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（1 同濟(jì)大學(xué)建筑工程系， 上海 200092； 2 北京工業(yè)大學(xué)空間結(jié)構(gòu)研究中心， 北京 100124）

［摘要］完成了體內(nèi)張拉成形空間網(wǎng)格結(jié)構(gòu)1∶10縮尺模型的成形試驗(yàn)，通過(guò)模型試驗(yàn)實(shí)測(cè)結(jié)果與理論計(jì)算結(jié)果的對(duì)比分析，研究結(jié)構(gòu)在張拉成形過(guò)程中內(nèi)力和節(jié)點(diǎn)位移變化、支座滑動(dòng)以及下弦預(yù)留縫隙閉合情況。研究結(jié)果表明，分次分批張拉對(duì)結(jié)構(gòu)內(nèi)力及節(jié)點(diǎn)位移產(chǎn)生一定影響，成形過(guò)程中下弦預(yù)留縫隙閉合速度相近。結(jié)構(gòu)成形的標(biāo)志是下弦水平，同時(shí)端部腹桿直立。確定結(jié)構(gòu)成形階段最不利桿件位置，建議在設(shè)計(jì)中采取加強(qiáng)措施。

［關(guān)鍵詞］體內(nèi)張拉；成形過(guò)程；試驗(yàn)研究

Experimental study on forming process of internal tensioning space lattice structure

Wang Lei¹, Zhang Yigang², Zhang Qilin¹(1 Department of Structural Engineering, Tongji University, Shanghai 200092, China； 2 Spatial Structures Research Center, Beijing University of Technology, Beijing 100124, China)

Abstract:The experimental study had been performed with 1∶10 scale model of internal tensioning space lattice structure. Comparing test results with theoretical ones, the mechanical performance were studied including internal forces, displacement of joints, sliding distance and gap closure. The results show that internal forces and displacement of joints are influenced by forming process. The velocities of gap closure of lower chord are similar during erection. The structure finally forms when the lower chords are horizontal completely and web members are erected. Test results indicate the position of critical-member during forming process and can be taken as the reference for the construction.