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型钢再生混凝土柱抗剪承载力可靠度分析

Reliability analysis on shear bearing capacity of steel reinforced recycled concrete column
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摘要 基于《建筑结构可靠度设计统一标准》(GB 50068—2001),采用蒙特卡罗法对型钢再生混凝土柱抗剪承载力进行可靠度分析,并对该柱发生剪切斜压破坏时的抗剪承载力计算公式进行了修正;在此基础上,重点研究了剪跨比、体积配箍率、型钢腹板配筋率、型钢强度、箍筋强度和再生骨料取代率对该柱抗剪承载力可靠指标的影响。结果表明,在分析参数范围内,型钢再生混凝土柱抗剪承载力可靠指标均满足现有规范要求,剪切斜压破坏时该柱的可靠指标平均值为3.718 7,比规范规定值高出0.018 7;弯曲破坏时该柱的可靠指标平均值为3.676 4,比规范规定值高出0.476 4;另外,型钢再生混凝土柱可靠指标随着剪跨比的增大而逐渐减小,随着再生粗骨料取代率的增加呈现递减趋势,随着体积配箍率和型钢腹板配钢率的增大而呈现上升的趋势,随着型钢强度和箍筋强度的提高而呈现上升趋势。上述结论可为型钢再生混凝土柱的抗震设计及工程应用提供参考。 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.
作者 马辉 邹昌明 王德法 薛建阳 任瑞 Ma Hui;Zou Changming;Wang Defa;Xue Jianyang;Ren Rui(School of Civil Engineering and Architecture,Xi'an University of Technology,Xi'an 710048,China;School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处 《建筑结构》 CSCD 北大核心 2019年第4期118-122,133共6页 Building Structure
基金 国家自然科学基金项目(51408485,51608435) 陕西省自然科学基础研究计划项目(2016JQ5024) 陕西省住房城乡建设科学技术计划项目(2015-K129) 陕西省博士后科学基金项目 西安理工大学科学研究计划项目(2016CX028)。
关键词 型钢再生混凝土柱 抗剪承载力 可靠度分析 可靠指标 蒙特卡罗法 steel reinforced recycled concrete column shear bearing capacity reliability analysis reliability index Monte- Carlo method
作者简介 马辉,博士,副教授,Email:mahuiwell@163.com。
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