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（河北工業(yè)大學(xué)土木與交通學(xué)院，  天津 300401）

［摘要］通過(guò)進(jìn)行1個(gè)HRB400鋼筋混凝土簡(jiǎn)支梁、4個(gè)HRB500鋼筋混凝土簡(jiǎn)支梁及6個(gè)600MPa鋼筋混凝土簡(jiǎn)支梁的受彎性能試驗(yàn)，對(duì)比分析HRB500及600MPa鋼筋混凝土梁的破壞特征、受力過(guò)程、受彎承載力、裂縫寬度及變形等受彎性能。研究結(jié)果表明，600MPa鋼筋混凝土梁的受力性能和HRB500鋼筋混凝土梁、普通鋼筋混凝土梁相同；600MPa鋼筋混凝土梁的受彎承載力、裂縫寬度、撓度的計(jì)算可以采用現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）中相關(guān)公式計(jì)算；計(jì)算得出的試驗(yàn)梁撓度能夠滿(mǎn)足規(guī)范限值要求；當(dāng)600MPa鋼筋屈服強(qiáng)度設(shè)計(jì)值取520MPa時(shí)，采用《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）中受彎承載力計(jì)算公式計(jì)算600MPa鋼筋混凝土梁的受彎承載力具有足夠的安全儲(chǔ)備。

［關(guān)鍵詞］600MPa鋼筋； 鋼筋混凝土梁； 受彎承載力； 裂縫寬度； 撓度

中圖分類(lèi)號(hào)：TU375-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)24-0089-04

Experimental research on crack and flexural behavior of concrete beams with 600MPa steel bars

Zhang Jianxin, Rong Xian, Liu Ping

(School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China)

Abstract:Based on flexural behavior experiment of one reinforced concrete simple supported beams with HRB400 steel bars, four reinforced concrete simple supported beams with HRB500 steel bars and six reinforced concrete simple supported beams with 600MPa steel bars, the failure characteristic, forced process, bending capacity, crack width and deformation of concrete beams with HRB500 steel bars and 600MPa steel bars were analyzed. It is shown that mechanical property of the reinforced concrete beams with 600MPa steel bars is the same as that of the reinforced  concrete beams with HRB500 steel bars and  common reinforced concrete  beams. The bending capacity, crack width and deformation of concrete beams with 600MPa steel bars can be calculated according to Code for design of concrete structures (GB 50010—2010). The deformation of test beams obtained by calculation can meet the limits of the maximum deformation in the code. When the yield strength design value of 600MPa steel bars is 520MPa, the bending capacity formula of Code for design of concrete structures (GB 50010—2010) is safe for calculating reinforced concrete beams with 600MPa steel bars.

Keywords:600MPa steel bar; reinforced concrete beam; bending capacity; crack width; deformation

*河北省高等學(xué)?？茖W(xué)技術(shù)研究項(xiàng)目（QN2017042），河北省高層次人才資助項(xiàng)目（B2017003003），河北省交通運(yùn)輸廳科技計(jì)劃項(xiàng)目（HE1728）。

作者簡(jiǎn)介：張健新，博士，講師，Email：zhangjianxin505@126.com。