對(duì)鋼筋混凝土矩形柱小偏心受壓計(jì)算方法的討論*
祝磊1,葉楨翔2
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(1 工程結(jié)構(gòu)與新材料北京市高等學(xué)校工程研究中心, 北京建筑大學(xué)土木與交通工程學(xué)院, 北京 100044; 2 清華大學(xué)結(jié)構(gòu)工程與振動(dòng)教育部重點(diǎn)實(shí)驗(yàn)室, 清華大學(xué)土木工程系, 北京 100084)[摘要]考慮在設(shè)計(jì)中受壓和受拉鋼筋的配筋率之和不超過5%,而且軸向壓力不會(huì)超過截面軸心受壓的承載力,通過推導(dǎo)得出,當(dāng)混凝土強(qiáng)度不超過C50,鋼筋為HRB400時(shí),鋼筋混凝土柱小偏心受壓時(shí)相對(duì)受壓區(qū)高度ξ幾乎不會(huì)達(dá)到h/h0,也就是說不會(huì)出現(xiàn)全截面受壓的情況,鋼筋混凝土柱小偏心受壓時(shí)相對(duì)受壓區(qū)高度ξ總是滿足ξb<ξ<h/h0。[關(guān)鍵詞]鋼筋混凝土; 小偏心受壓; 計(jì)算方法; 矩形柱中圖分類號(hào):TU375.3 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1002-848X(2013)21-0066-03Discussion on method of calculation for reinforced concrete rectangular compression column with small eccentricityZhu Lei1, Ye Zhenxiang2(1 Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2 Key laboratory of Structural Engineering and Vibration of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China)Abstract: It is considered that the total compressive and tensile reinforcement ratio is not beyond 5% in design and the axial compression will not be higher than the axial compressive capacity. Therefore, it is derived that the relative compressive height ξ will hardly reach h/h0 for C50 concrete and HRB400 reinforcement in the RC compression column with small eccentricity, i.e., the whole compressive section case will not happen and the relative compressive height ξ will always hold ξb<ξ<h/h0.Keywords: reinforced concrete; compression section with small eccentricity; method of calculation; rectangular column*北京市屬高等學(xué)校高層次人才引進(jìn)與培養(yǎng)計(jì)劃項(xiàng)目(CIT&TCD201304068)。作者簡介:祝磊,博士,副教授,Email:zhulei@bucea.edu.cn。參考文獻(xiàn)[1]葉列平. 混凝土結(jié)構(gòu)(上冊(cè))[M]. 北京:中國建筑工業(yè)出版社,2012.[2]東南大學(xué),天津大學(xué),同濟(jì)大學(xué). 混凝土結(jié)構(gòu)設(shè)計(jì)原理[M]. 5版. 北京:中國建筑工業(yè)出版社,2012.[3]劉立新,葉燕華. 混凝土結(jié)構(gòu)原理[M]. 新1版. 武漢:武漢理工大學(xué)出版社,2011.
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