基于简化拉压杆模型的钢筋混凝土框架异型节点抗剪性能研究
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摘要
在以往试验研究的基础上,建立了框架异型节点等效核心区在剪、压复合作用下的计算模型,应用简化拉压杆模型方法对等效核心区进行了受力分析。研究表明:基于简化拉压杆模型方法计算得到异型节点的抗剪承载力与现行规范建议方法计算结果相当,但简化拉压杆模型方法有明确的力学计算模型,基于该模型计算得到的抗剪承载力与试验结果吻合较好。在此基础上应用简化拉压杆模型方法就轴压力变化对异型节点受力性能的影响进行了初步分析。
Based on the experimental study,an analytical model for equivalent joint core of frame joint under the combined action of axial load and shear is established,and the shear strength of equivalent joint core of tested specimens is calculated by using softened strut and tie model(STM).Results indicate that the calculated shear strength of STM is quite nearly with that of code method,but STM has more definite mechanical model.Thus,full agreement between experimental results and prediction results of STM is reached.Based on the softened strut and tie model,the effect of axial compression ratio on seismic behavior of irregular interior joints is also discussed.
Based on the experimental study,an analytical model for equivalent joint core of frame joint under the combined action of axial load and shear is established,and the shear strength of equivalent joint core of tested specimens is calculated by using softened strut and tie model(STM).Results indicate that the calculated shear strength of STM is quite nearly with that of code method,but STM has more definite mechanical model.Thus,full agreement between experimental results and prediction results of STM is reached.Based on the softened strut and tie model,the effect of axial compression ratio on seismic behavior of irregular interior joints is also discussed.
引文
[1]季韬,郑作樵.软化桁架模型在梁柱节点设计中的应用[J].工程力学,2001,18(6):76-80.
[2]Jirsa J O.Shear in joints and other places[J].Recent Developments In Lateral Force Transfer In Buildings,ACI,1995,SP157-3:59-73.
[3]曹万林,孙超,杨兴民,等.双向单排配筋剪力墙节点抗震性能试验研究[J].地震工程与工程振动,2005,25(3)73-79.
[4]葛继平,宗周红,杨强跃.钢管混凝土柱与钢梁半刚性连接节点的恢复力本构模型[J].地震工程与工程振动,2005,25(6)80-84.
[5]王田友,苏小卒,方江生.拉压杆模型方法在钢筋混凝土框架节点计算中的应用研究[J].土木工程学报,2007,40(11):36-40.
[6]刘钊,吕志涛,惠卓,等.拉压杆模型在混凝土梁桥中应用与研究进展[J].中国工程科学,2008,10(10):14-21.
[7]Hwang S J,Lee HJ.Analytical model for predicting shear strengths of interior reinforced concrete beam-column joints for seismic resistance[J].ACI Structural Journal,2000,97(1):35-44.
[8]Hwang S J,Lee HJ.Analytical model for predicting shear strengths of exterior reinforced concrete beam-column joints for seismic resistance[J].ACI Structural Journal,1999,96(5):846-857.
[9]Hwang S J,Lu W Y,Lee HJ.Shear strength prediction for deep beams[J].ACI Structural Journal,2000,97(3):367-376.
[10]吴涛,邢国华,刘伯权,等.钢筋混凝土框架变梁中节点抗震性能试验研究[J].建筑结构学报,2010,31(10):98-106.
[11]刘伯权,邢国华,吴涛,等.钢筋混凝土框架异型中节点抗裂性能试验研究[J].土木工程学报,2009,42(10):67-73.
[12]吴涛,邢国华,刘伯权,等.不同配筋形式钢筋混凝土框架变梁节点抗震性能试验研究[J].地震工程与工程振动,2010,30(3):27-35.
[13]Hsu Thomas TC.Toward a unified nomenclature for reinforced concrete theory[J].Journal of the Structural Engineering,ASCE,1996,122(3):275-283.
[14]Hwang S J,Lee HJ.Strength prediction for discontinuity regions by softened strut-and-tie model[J].Journal of The Structural Division,ASCE,2002,128(12):1519-1526.
[15]Paulay T,Priestley MN J.Seismic design of reinforced concrete and masonry buildings[M].New York:John Wiley&Sons,1992.
[16]Joh O,Goto Y,Shibata T.Behavior of reinforced concrete beam-column joints with eccentricity[J].Design of Beam-Column Joints for Seismic Re-sistance,ACI,1991,SP123-12:317-357.
[17]白国良,李红星,朱佳宁.钢筋混凝土框架异型节点抗震性能试验研究[J].建筑结构学报,2004,25(4):8-14.
[18]GB 50010-2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[2]Jirsa J O.Shear in joints and other places[J].Recent Developments In Lateral Force Transfer In Buildings,ACI,1995,SP157-3:59-73.
[3]曹万林,孙超,杨兴民,等.双向单排配筋剪力墙节点抗震性能试验研究[J].地震工程与工程振动,2005,25(3)73-79.
[4]葛继平,宗周红,杨强跃.钢管混凝土柱与钢梁半刚性连接节点的恢复力本构模型[J].地震工程与工程振动,2005,25(6)80-84.
[5]王田友,苏小卒,方江生.拉压杆模型方法在钢筋混凝土框架节点计算中的应用研究[J].土木工程学报,2007,40(11):36-40.
[6]刘钊,吕志涛,惠卓,等.拉压杆模型在混凝土梁桥中应用与研究进展[J].中国工程科学,2008,10(10):14-21.
[7]Hwang S J,Lee HJ.Analytical model for predicting shear strengths of interior reinforced concrete beam-column joints for seismic resistance[J].ACI Structural Journal,2000,97(1):35-44.
[8]Hwang S J,Lee HJ.Analytical model for predicting shear strengths of exterior reinforced concrete beam-column joints for seismic resistance[J].ACI Structural Journal,1999,96(5):846-857.
[9]Hwang S J,Lu W Y,Lee HJ.Shear strength prediction for deep beams[J].ACI Structural Journal,2000,97(3):367-376.
[10]吴涛,邢国华,刘伯权,等.钢筋混凝土框架变梁中节点抗震性能试验研究[J].建筑结构学报,2010,31(10):98-106.
[11]刘伯权,邢国华,吴涛,等.钢筋混凝土框架异型中节点抗裂性能试验研究[J].土木工程学报,2009,42(10):67-73.
[12]吴涛,邢国华,刘伯权,等.不同配筋形式钢筋混凝土框架变梁节点抗震性能试验研究[J].地震工程与工程振动,2010,30(3):27-35.
[13]Hsu Thomas TC.Toward a unified nomenclature for reinforced concrete theory[J].Journal of the Structural Engineering,ASCE,1996,122(3):275-283.
[14]Hwang S J,Lee HJ.Strength prediction for discontinuity regions by softened strut-and-tie model[J].Journal of The Structural Division,ASCE,2002,128(12):1519-1526.
[15]Paulay T,Priestley MN J.Seismic design of reinforced concrete and masonry buildings[M].New York:John Wiley&Sons,1992.
[16]Joh O,Goto Y,Shibata T.Behavior of reinforced concrete beam-column joints with eccentricity[J].Design of Beam-Column Joints for Seismic Re-sistance,ACI,1991,SP123-12:317-357.
[17]白国良,李红星,朱佳宁.钢筋混凝土框架异型节点抗震性能试验研究[J].建筑结构学报,2004,25(4):8-14.
[18]GB 50010-2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
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