- 摘 要
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（1 同濟大學(xué)預(yù)應(yīng)力研究所， 上海 200092； 2 同濟大學(xué)先進土木工程材料教育部重點實驗室， 上海 200092）
［摘要］提出并介紹了應(yīng)用二次預(yù)應(yīng)力技術(shù)的新型疊合梁——混合配預(yù)應(yīng)力筋疊合梁，并簡要分析了其受力的特點和適用的范圍。通過數(shù)值模擬方法就一階段受力對后張有粘結(jié)與后張無粘結(jié)兩種不同工藝的混合配預(yù)應(yīng)力筋疊合梁的力學(xué)性能產(chǎn)生的影響進行了重點分析，分析內(nèi)容主要包括梁的抗裂性能、剛度退化以及極限承載力等方面。結(jié)果表明，因為預(yù)應(yīng)力筋傳力機制不同，一階段受力對采用后張有粘結(jié)或無粘結(jié)預(yù)應(yīng)力的混合配預(yù)應(yīng)力筋疊合梁的力學(xué)性能有明顯不同的影響。
［關(guān)鍵詞］疊合梁； 混合配筋； 預(yù)應(yīng)力； 一階段受力
中圖分類號：TU378-2文獻標(biāo)識碼：A文章編號：1002-848X(2018)08-0046-06
Research on the first-loading sensibility of composite beams with hybrid prestressed tendons
Xiong Xueyu1,2, Xiao Qisheng1
(1 Institute of Prestressed Structures, Tongji University, Shanghai 200092, China; 2 Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education, Shanghai 200092, China)
Abstract:A new type of composite beam, which applies second inflicted prestressed technology was presented and introduced. The unique characteristic and the range of application were discussed. The mechanical properties of prestressed concrete composite beams with bonded or unbonded post-tension technique under first-loading were analyzed through numerical simulation method，including beam crack resistance, stiffness degradation and ultimate bearing capacity and so on. The result shows that the first-loading has different influences on the beams with two different posttension for the working mode of prestressed tendon.
Keywords:composite beam; hybrid reinforcement; prestressing; first-loading
*上海市住房和城鄉(xiāng)建設(shè)管理委員會科研項目(2016-001-003)，國家自然科學(xué)基金資助項目(51178328)。
作者簡介：熊學(xué)玉，博士，教授，博士生導(dǎo)師，Email：xueyu@#edu.cn。
