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（1 西安理工大學(xué)土木建筑工程學(xué)院， 西安 710048； 2 西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）

［摘要］基于《建筑結(jié)構(gòu)可靠度設(shè)計(jì)統(tǒng)一標(biāo)準(zhǔn)》（GB 50068—2001），采用蒙特卡羅法對(duì)型鋼再生混凝土柱抗剪承載力進(jìn)行可靠度分析，并對(duì)該柱發(fā)生剪切斜壓破壞時(shí)的抗剪承載力計(jì)算公式進(jìn)行了修正；在此基礎(chǔ)上，重點(diǎn)研究了剪跨比、體積配箍率、型鋼腹板配筋率、型鋼強(qiáng)度、箍筋強(qiáng)度和再生骨料取代率對(duì)該柱抗剪承載力可靠指標(biāo)的影響。結(jié)果表明，在分析參數(shù)范圍內(nèi)，型鋼再生混凝土柱抗剪承載力可靠指標(biāo)均滿(mǎn)足現(xiàn)有規(guī)范要求，剪切斜壓破壞時(shí)該柱的可靠指標(biāo)平均值為3-718 7，比規(guī)范規(guī)定值高出0-018 7；彎曲破壞時(shí)該柱的可靠指標(biāo)平均值為3-676 4，比規(guī)范規(guī)定值高出0-476 4；另外，型鋼再生混凝土柱可靠指標(biāo)隨著剪跨比的增大而逐漸減小，隨著再生粗骨料取代率的增加呈現(xiàn)遞減趨勢(shì)，隨著體積配箍率和型鋼腹板配鋼率的增大而呈現(xiàn)上升的趨勢(shì)，隨著型鋼強(qiáng)度和箍筋強(qiáng)度的提高而呈現(xiàn)上升趨勢(shì)。上述結(jié)論可為型鋼再生混凝土柱的抗震設(shè)計(jì)及工程應(yīng)用提供參考。

［關(guān)鍵詞］型鋼再生混凝土柱； 抗剪承載力； 可靠度分析； 可靠指標(biāo)； 蒙特卡羅法

中圖分類(lèi)號(hào)：TU398+.9文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)04-0118-05

Reliability analysis on shear bearing capacity of steel reinforced recycled concrete column

Ma Hui1， Zou Changming1， Wang Defa1， Xue Jianyang2， Ren Rui2

（1 School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China;2 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China）

Abstract:Based on Unified standard for reliability design of building structures (GB 50068—2001), the Monte-Carlo method was used to analyze the reliability of the shear bearing capacity of steel reinforced recycled concrete (SRRC) columns. In addition, the calculation formula of the shear capacity of SRRC columns for the shear failure was modified. On the basis of this, the influences of shear-span ratio, stirrup ratio, steel ratio of steel web, steel strength, stirrup strength and replacement rate of recycled aggregate on the reliability of the shear strength were studied emphatically. The results show that the reliability indexes of the shear bearing capacity of SRRC columns can meet the demand of existing code in the range of studied parameters. The average reliability index of SRRC columns with shear diagonal compression failure is 3-718 7, which is 0-018 7 higher than that of the standard value. The average reliability index of SRRC columns with bending failure is 3-676 4, which is 0-476 4 higher than that of standard value. In addition, the reliability indexes decrease with the increase of shear-span ratio and replacement rate of recycled aggregate. And the reliability indexes increase with the increase of stirrup ratio, steel ratio of steel web, steel strength and stirrup strength. The conclusions can provide reference for the earthquake resistance design and application of SRRC columns.

Keywords:steel reinforced recycled concrete column; shear bearing capacity; reliability analysis; reliability index; Monte-Carlo method

*國(guó)家自然科學(xué)基金項(xiàng)目(51408485,51608435)，陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃項(xiàng)目(2016JQ5024)，陜西省住房城鄉(xiāng)建設(shè)科學(xué)技術(shù)計(jì)劃項(xiàng)目（2015-K129），陜西省博士后科學(xué)基金項(xiàng)目，西安理工大學(xué)科學(xué)研究計(jì)劃項(xiàng)目（2016CX028）。

作者簡(jiǎn)介：馬輝，博士，副教授，Email: mahuiwell@163.com。