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型鋼再生混凝土柱抗剪承載力可靠度分析*
馬輝1,鄒昌明1,王德法1,薛建陽2,任瑞2
摘 要

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

[摘要]基于《建筑結構可靠度設計統一標準》(GB 50068—2001),采用蒙特卡羅法對型鋼再生混凝土柱抗剪承載力進行可靠度分析,并對該柱發生剪切斜壓破壞時的抗剪承載力計算公式進行了修正;在此基礎上,重點研究了剪跨比、體積配箍率、型鋼腹板配筋率、型鋼強度、箍筋強度和再生骨料取代率對該柱抗剪承載力可靠指標的影響。結果表明,在分析參數范圍內,型鋼再生混凝土柱抗剪承載力可靠指標均滿足現有規范要求,剪切斜壓破壞時該柱的可靠指標平均值為3-718 7,比規范規定值高出0-018 7;彎曲破壞時該柱的可靠指標平均值為3-676 4,比規范規定值高出0-476 4;另外,型鋼再生混凝土柱可靠指標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遞減趨勢,隨著體積配箍率和型鋼腹板配鋼率的增大而呈現上升的趨勢,隨著型鋼強度和箍筋強度的提高而呈現上升趨勢。上述結論可為型鋼再生混凝土柱的抗震設計及工程應用提供參考。

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

中圖分類號:TU398+.9文獻標識碼:A文章編號: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

 

*國家自然科學基金項目(51408485,51608435),陜西省自然科學基礎研究計劃項目(2016JQ5024),陜西省住房城鄉建設科學技術計劃項目(2015-K129),陜西省博士后科學基金項目,西安理工大學科學研究計劃項目(2016CX028)。

 

作者簡介:馬輝,博士,副教授,Email: [email protected]

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