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(1 內(nèi)蒙古久明建設(shè)工程施工圖審查有限公司,呼和浩特 010020; 2 內(nèi)蒙古城市規(guī)劃市政設(shè)計(jì)研究院有限公司,呼和浩特 010070;3 內(nèi)蒙古電力科學(xué)研究院,呼和浩特 010020)
[摘要]從鋼筋混凝土正截面承載能力計(jì)算時(shí)的平截面假定、不考慮混凝土抗拉強(qiáng)度、鋼筋應(yīng)力-應(yīng)變關(guān)系為理想彈塑性模型的基本假定出發(fā),建立了圓形截面上各種應(yīng)力圖形的函數(shù)表達(dá)式。利用曲線積分的數(shù)學(xué)方法,推導(dǎo)出計(jì)算鋼筋混凝土圓形截面構(gòu)件截面延性系數(shù)的數(shù)學(xué)公式,并給出了鋼筋混凝土圓形截面在外力作用下截面應(yīng)力圖形形狀的判別式,可供圓截面構(gòu)件進(jìn)行延性設(shè)計(jì)時(shí)參考。
[關(guān)鍵詞]鋼筋混凝土;圓形截面;延性系數(shù);屈服;極限
中圖分類號:TU375文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2012)02-0122-05
Calculation for the cross-section ductile coefficient of reinforced concrete round section members
Sun Kejian1,2, Li Fengxiang2, Yan Li3(1 Inner Mongolia Jiuming Construction Engineering Drawing Reviewing Center, Hohhot 010020, China;2 Inner Mongolia Urban Planning & Municipal Engineering Design Research Institute, Hohhot 010070, China;3 Inner Mongolia Electric Science & Research Institute, Hohhot 010020, China)
Abstract:Based on the basic assumption that the section is plane, the tensile strength of concrete is ignored and the steel stress-strain relationship is the ideal elastic-plastic model while calculating the bearing capacity of the reinforced concrete normal section,function expressions for different stress graphs on the round section were set up. By using the mathematical method of curve integral, the mathematical formulas to calculate the cross-section ductile coefficient of reinforced concrete round section members-were derived, and the discriminant of the cross-section stress graphic shape on the reinforced concrete round section under the external force were given,which can provide reference for ductile design of round section members.
Keywords:reinforced concrete;round section;ductile coefficient;yield;limit
*內(nèi)蒙古自治區(qū)自然科學(xué)基金項(xiàng)目(200711020722)。
作者簡介:孫克儉,教授級高級工程師,內(nèi)蒙古自治區(qū)工程設(shè)計(jì)大師,享受國務(wù)院政府特殊津貼專家,一級注冊結(jié)構(gòu)工程師,Email:skj898989@163.com。
參考文獻(xiàn)
[1]孫克儉. T形和工字形截面構(gòu)件截面延性系數(shù)的計(jì)算[J].建筑結(jié)構(gòu),1986,16(2):36-40.
[2]孫克儉. 矩形截面構(gòu)件截面延性系數(shù)的計(jì)算[J].建筑結(jié)構(gòu),1987,17(2):30-34.
[3]孫克儉. 鋼筋混凝土環(huán)形截面構(gòu)件截面延性系數(shù)的計(jì)算[J].建筑結(jié)構(gòu),2007,37(7):38-41.
[4]孫克儉. 鋼筋混凝土抗震結(jié)構(gòu)的延性及延性設(shè)計(jì)[M].呼和浩特:內(nèi)蒙古人民出版社,1992
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