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（1 同濟(jì)大學(xué)預(yù)應(yīng)力研究所， 上海 200092; 2 同濟(jì)大學(xué)先進(jìn)土木工程材料教育部重點(diǎn)實(shí)驗(yàn)室， 上海 200092）

［摘要］以已有試驗(yàn)數(shù)據(jù)為基礎(chǔ)，分析了配高強(qiáng)鋼筋的部分預(yù)應(yīng)力混凝土梁在靜力荷載作用下影響其抗彎承載力的主要因素，提出了相應(yīng)的計(jì)算方法，指出在進(jìn)行配高強(qiáng)鋼筋的混凝土梁的設(shè)計(jì)計(jì)算時(shí)，應(yīng)考慮界限受壓區(qū)高度的變化；分析了配高強(qiáng)鋼筋的部分預(yù)應(yīng)力混凝土受彎構(gòu)件的抗裂性及裂縫性能，對(duì)規(guī)范及修正公式進(jìn)行了驗(yàn)證，為該類結(jié)構(gòu)的設(shè)計(jì)提供了參考。

［關(guān)鍵詞］預(yù)應(yīng)力混凝土結(jié)構(gòu)； 高強(qiáng)鋼筋； 承載力； 裂縫

中圖分類號(hào)：TU378-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)08-0052-04

Research on flexural capacity and crack property of prestressed beams reinforced with highstrength steel bars

Xiong Xueyu1,2, Hua Nan1, Wang Yiqingzi1

(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:Based on the analysis of existing test data, the main factors affecting the flexural capacity of partially prestressed concrete beams reinforced with high-strength steel bars were analyzed and a method of calculation was proposed, and the change of the compression zone height should be taken into account when designing and calculating concrete beams reinforced with high-strength steel bars. The crack resistance and property of partially prestressed beams reinforced with high-strength steel bars was also analyzed. The related equations in code has been carefully verified and a reference for the future designing of such structures has been provided.

Keywords:prestressed concrete structure; high-strength steel bar; bearing capacity; crack

*國(guó)家自然科學(xué)基金資助項(xiàng)目（５１１７８３２８，５１５７８４００），住房城鄉(xiāng)建設(shè)部研究開(kāi)發(fā)項(xiàng)目（２０１６-Ｋ5-０２０），上海市科學(xué)技術(shù)委員會(huì)科研計(jì)劃項(xiàng)目（１６ＤＺ１２０１６００,13231200903），上海市住房和城鄉(xiāng)建設(shè)管理委員會(huì)科研項(xiàng)目（２０１６-００１-００３）。

作者簡(jiǎn)介：熊學(xué)玉，博士，教授，博士生導(dǎo)師， Email：xueyu@#edu.cn。