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(1 重慶大學(xué)土木工程學(xué)院，重慶 400045； 2 中國(guó)建筑西南設(shè)計(jì)研究院，成都 610081)
［摘要］通過(guò)對(duì)一倒圓角三角形弦支穹頂結(jié)構(gòu)4種預(yù)應(yīng)力方案的靜力分析，比較了不同的預(yù)應(yīng)力設(shè)置方案下結(jié)構(gòu)的最大豎向位移、上部網(wǎng)殼構(gòu)件的最大軸力和支座徑向位移。在此基礎(chǔ)上提出了進(jìn)一步提高此類結(jié)構(gòu)受力性能指標(biāo)的綜合優(yōu)化方案。分析結(jié)果表明：在選擇預(yù)應(yīng)力優(yōu)化方案時(shí)為防止結(jié)構(gòu)變形和預(yù)應(yīng)力損失的影響，需要對(duì)結(jié)構(gòu)進(jìn)行形態(tài)分析；最優(yōu)的預(yù)應(yīng)力方案是在幾何法和剛性索法的基礎(chǔ)上得出的，預(yù)應(yīng)力方案的選擇需要基于結(jié)構(gòu)的各項(xiàng)性能指標(biāo)來(lái)綜合判斷。
［關(guān)鍵詞］倒圓角三角形弦支穹頂；形態(tài)分析；張力補(bǔ)償法；幾何法；剛性索法
Prestress optimization of chamfering triangle suspen-dome structure
Yang Bo1, Dai Guoxin1, Nie Shidong1, Wang Liwei2, Yang Wen2, Yang Xi2(1 College of Civil Engineering, Chongqing University, Chongqing 400045, China;2 China Southwest Architectural Design and Research Institute, Chengdu 610081, China)
Abstract:Based on the static analysis of four prestress methods for the same chamfering triangle suspen-dome structure, the internal force of the member, joint displacement and the support horizontally radial dispalcement were compared. In addition, the compositive prestress optimization, which could increase the load-capability dramatically, was proposed. The analysis results indicate that in order to prevent the deformation of structure and reduce the influence of prestress loss, it is necessary to conduct the structural shape analysis when selecting the prestress optimization method. The optimization of prestress method is found based on the geometry method and rigid cable method, therefore the selection of prestress method should be judged according to the different structural performance and response.
Keywords:chamfering triangle suspen-dome structure; shape analysis; tension compensation method; geometry method; rigid cable method
作者簡(jiǎn)介：楊波，博士研究生，Email:YANG0206@ntu.edu.sg。
參考文獻(xiàn)
［1］郭云. 弦支穹頂結(jié)構(gòu)形態(tài)分析、動(dòng)力性能及靜動(dòng)力試驗(yàn)研究［D］. 天津：天津大學(xué)，2003.
［2］張曉峰. 奧運(yùn)羽毛球館弦支穹頂結(jié)構(gòu)整體穩(wěn)定及動(dòng)力性能研究［D］. 北京：北京工業(yè)大學(xué)，2008.
［3］黃冬明. 弦支穹頂施工過(guò)程中預(yù)應(yīng)力優(yōu)化設(shè)計(jì)與試驗(yàn)研究［D］. 北京：北京工業(yè)大學(xué)，2007.