考虑SSI和填充墙刚度效应的RC框架结构抗震性能研究
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摘要
以满足现行设计规范要求的某一10层填充墙竖向布置不规则的钢筋混凝土框架结构为研究对象,运用SAP2000模拟计算不同场地条件下该结构在地震作用下的响应规律.分别对在刚性地基假定上不考虑填充墙的刚度效应、在土-结构相互作用(SSI)基础上不考虑填充墙的刚度效应、在刚性地基假定上考虑填充墙的刚度效应以及同时考虑SSI和填充墙的刚度效应4种不同情况进行动力时程分析,对比研究该结构的抗震性能.对比结果表明:1)在大震作用下,在SSI效应的基础上考虑填充墙的刚度效应会使SSI效应更加显著,对RC框架结构的层间位移角响应存在不利影响,采用刚性地基假定、忽略填充墙的刚度效应对结构是偏于不安全的.2)对结构进行倒塌分析,在SSI效应基础上考虑填充墙的刚度效应使结构的塑性变形向楼层底层集中更加明显,结构倒塌的峰值明显降低,且随着场地土变软,结构的倒塌峰值越低.因此,建议设计人员在该类钢筋混凝土框架结构的设计中增加底层柱的延性确保结构在地震作用下的变形需求.
In this paper, a 10-story RC frame structure satisfying the current design codes was taken as a study example, and the structural response regulation under different site condition subjected to earthquake actions was simulated and calculated by SAP2000. Four kinds of cases namely considering the rigid foundation assumption without the influence of stiffness effects of the infill walls, soil-structure interaction without the influence of the stiffness effects of the infill walls, rigid foundation assumption together with the influence of the stiffness effects of the infill walls, and soil-structure interaction together with the influence of the stiffness effects of the infill walls, were examined in the dynamic time history analysis, respectively, and the seismic performance of this structure was studied comparatively. The comparison of the results showed that:(1)For the RC frame structure under rare earthquakes,considering the SSI effect with the stiffness of infill walls has negative influence on the structural response of the inter layer drift ratio. The structure with the rigid foundation assumption is not safe when the stiffness effect of the infill walls is not considered.(2)For structural collapse analysis, considering the stiffness effect of the infill walls with the SSI effect obviously generates the structural plastic deformation concentrated on the bottom story and decreases the peak values of the collapsed structure. The softer site soil results in the lower peak values of the collapse. It is suggested that designers should increase the ductility of columns to ensure the deformation demands under seismic action.
In this paper, a 10-story RC frame structure satisfying the current design codes was taken as a study example, and the structural response regulation under different site condition subjected to earthquake actions was simulated and calculated by SAP2000. Four kinds of cases namely considering the rigid foundation assumption without the influence of stiffness effects of the infill walls, soil-structure interaction without the influence of the stiffness effects of the infill walls, rigid foundation assumption together with the influence of the stiffness effects of the infill walls, and soil-structure interaction together with the influence of the stiffness effects of the infill walls, were examined in the dynamic time history analysis, respectively, and the seismic performance of this structure was studied comparatively. The comparison of the results showed that:(1)For the RC frame structure under rare earthquakes,considering the SSI effect with the stiffness of infill walls has negative influence on the structural response of the inter layer drift ratio. The structure with the rigid foundation assumption is not safe when the stiffness effect of the infill walls is not considered.(2)For structural collapse analysis, considering the stiffness effect of the infill walls with the SSI effect obviously generates the structural plastic deformation concentrated on the bottom story and decreases the peak values of the collapsed structure. The softer site soil results in the lower peak values of the collapse. It is suggested that designers should increase the ductility of columns to ensure the deformation demands under seismic action.
引文
[1]孙柏涛,张桂欣.汶川8.0级地震中各类建筑结构地震易损性统计分析[J].土木工程学报,2012,45(5):26—30.SUN B T,ZHANG G X. Statistical analysis of the seismic vulnerability of various types of building structures in Wenchuan M8.0 earthquake[J]. China Civil Engineering Journal,2012,45(5):26—30.(In Chinese)
[2] GALAL K,NAIMI M. Effect of soil conditions on the response of reinforced concrete tall structures to near-fault earthquakes[J].The Structural Design of Tall and Special Buildings,2008,17(3):541—562.
[3] RAJEEV P,TESFAMARIAM S. Seismic fragilities of non-ductile reinforced concrete frames with consideration of soil structure interaction[J]. Soil Dynamics and Earthquake Engineering,2012,40:78—86.
[4]岳庆霞,叶列平,陆征新.土结构相互作用对框架结构倒塌的影响研究[J].工程力学,2014,31(3):1—6.YUE Q X,YE L P,LU Z X. Research on the influence of soilstructure interaction[J]. Engineering Mechanics,2014,31(3):1—6.(In Chinese)
[5]王海东,盛旺成.考虑土-结构相互作用与重力二阶效应影响的钢筋混凝土框架结构地震反应分析[J].地震工程与工程振动,2016,36(3):170—177.WANG H D,SHENG W C. Seismic response of RC frame considering soil-structure interaction and gravity second-order effect[J]. Earthquake Engineering and Engineering Dynamics,2016,36(3):170—177.(In Chinese)
[6]李英民,韩军,田启祥,等.填充墙对框架结构抗震性能的影响[J].地震工程与工程震动,2009,29(3):51—58.LI Y M,HAN J,TIAN Q X,et al. Study on influence of infilled walls on seismic performance of RC frame structures[J].Earthquake Engineering and Engineering Dynamics,2009,29(3):51—58.(In Chinese)
[7]易伟建,周云,覃廖辉.大底盘双塔楼高层建筑的随机振动测试及模型修正研究[J].土木工程学报,2009,42(2):65—72.YI W J,ZHOU Y,QIN L H. Measurement of ambient vibration of a twin-tower building with enlarged base and model modification[J]. China Civil Engineering Journal,2009,42(2):65—72.(In Chinese)
[8]仇一颗,周祎,周云,等.实测高层建筑抗震分析中填充墙刚度的影响[J].湖南大学学报(自然科学版),2018,45(3):8—17.QIU Y K,ZHOU Y,ZHOU Y,et al. Influence of infill wall stiffness on seismic analysis of high-rise building[J]. Journal of Hunan University(Natural Sciences),2018,45(3):8—17.(In Chinese)
[9]黄华,叶燕霞.填充墙对框架结构抗震性能影响分析[J].土木工程学报,2010,43(S1):156—162.HUANG H,YE Y X. Influence of filled wall on seismic performance of frame structure[J]. China Civil Engineering Journal,2010,43(S1):156—162.(In Chinese)
[10]黄靓,易宏伟,王辉,等.带节能砌体填充墙的RC框架抗震试验研究[J].湖南大学学报(自然科学版),2014,41(1):15—20.HUANG L,YI H W,WANG H,et al. Experimental research on seismic of rc frames with energy conservation masonry infill walls[J]. Journal of Hunan University(Natural Sciences),2014,41(1):15—20.(In Chinese)
[11]阎红霞,杨庆山.多遇地震下填充墙侧向刚度对RC框架结构抗震性能的影响[J].土木工程学报,2012,45(A1):54—60.YAN H X,YANG Q S. The influence of infill wall lateral stiffness on the seismic performance of RC frame structures under small earthquakes[J]. China Civil Engineering Journal,2012,45(A1):54—60.(In Chinese)
[12] DANIELE R T,TAKSIAH A M,BAMBANG B. The use of steel damper for enhancing the seismic performance of rc frame with soft first story[J]. Journal of Civil Engineering Research,2014,4(3A):191—202.
[13] KONSTANTINOS M,KONSTANTINOS K. The role of masonry infills on the damage response of R/C buildings subjected to seismic sequences[J]. Engineering Structures,2017,131:459—476.
[14]GB 50011—2016建筑抗震设计规范[S].北京:中国建筑工业出版社,2016:31—47.GB 50011—2016 Code for seismic design of buildings[S].Beijing:Building Industry Press of China,2016:31—47.(In Chinese)
[15]JGJ 3—2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010:29—41.JGJ 3—2010 Technical specification for concrete structures of tall buildings[S]. Beijing:Building Industry Press of China,2010:29—41.(In Chinese)
[16]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006:500—533.Beijing jin-tu-mu software technology company,China institute of building standard design&research. Chinese use guide for SAP2000[M]. Beijing:China Communications Press,2006:500—533.(In Chinese)
[17] FEMA. NEHRP guidelines for the seismic rehabilitation of buildings,ReportFEMA356[R]. Washington DC:FEMA356,2000:7—1—7—29.
[18]GB 50003—2011砌体结构设计规范[S].北京:中国建筑工业出版社,2011:11—20.GB 50003—2011 Code for design of masonry structures[S].Beijing:Building Industry Press of China,2011:11—20.(In Chinese)
[19]黄靓,施楚贤,吕伟荣.对框架填充墙结构抗震设计的思考[J].建筑结构,2005,35(8):27—29.HUAGN L,SHI C X,L譈W R. Some aspects of seismic design method of infilled wall-frame structures[J]. Building Structure,2005,35(8):27—29.(In Chinese)
[2] GALAL K,NAIMI M. Effect of soil conditions on the response of reinforced concrete tall structures to near-fault earthquakes[J].The Structural Design of Tall and Special Buildings,2008,17(3):541—562.
[3] RAJEEV P,TESFAMARIAM S. Seismic fragilities of non-ductile reinforced concrete frames with consideration of soil structure interaction[J]. Soil Dynamics and Earthquake Engineering,2012,40:78—86.
[4]岳庆霞,叶列平,陆征新.土结构相互作用对框架结构倒塌的影响研究[J].工程力学,2014,31(3):1—6.YUE Q X,YE L P,LU Z X. Research on the influence of soilstructure interaction[J]. Engineering Mechanics,2014,31(3):1—6.(In Chinese)
[5]王海东,盛旺成.考虑土-结构相互作用与重力二阶效应影响的钢筋混凝土框架结构地震反应分析[J].地震工程与工程振动,2016,36(3):170—177.WANG H D,SHENG W C. Seismic response of RC frame considering soil-structure interaction and gravity second-order effect[J]. Earthquake Engineering and Engineering Dynamics,2016,36(3):170—177.(In Chinese)
[6]李英民,韩军,田启祥,等.填充墙对框架结构抗震性能的影响[J].地震工程与工程震动,2009,29(3):51—58.LI Y M,HAN J,TIAN Q X,et al. Study on influence of infilled walls on seismic performance of RC frame structures[J].Earthquake Engineering and Engineering Dynamics,2009,29(3):51—58.(In Chinese)
[7]易伟建,周云,覃廖辉.大底盘双塔楼高层建筑的随机振动测试及模型修正研究[J].土木工程学报,2009,42(2):65—72.YI W J,ZHOU Y,QIN L H. Measurement of ambient vibration of a twin-tower building with enlarged base and model modification[J]. China Civil Engineering Journal,2009,42(2):65—72.(In Chinese)
[8]仇一颗,周祎,周云,等.实测高层建筑抗震分析中填充墙刚度的影响[J].湖南大学学报(自然科学版),2018,45(3):8—17.QIU Y K,ZHOU Y,ZHOU Y,et al. Influence of infill wall stiffness on seismic analysis of high-rise building[J]. Journal of Hunan University(Natural Sciences),2018,45(3):8—17.(In Chinese)
[9]黄华,叶燕霞.填充墙对框架结构抗震性能影响分析[J].土木工程学报,2010,43(S1):156—162.HUANG H,YE Y X. Influence of filled wall on seismic performance of frame structure[J]. China Civil Engineering Journal,2010,43(S1):156—162.(In Chinese)
[10]黄靓,易宏伟,王辉,等.带节能砌体填充墙的RC框架抗震试验研究[J].湖南大学学报(自然科学版),2014,41(1):15—20.HUANG L,YI H W,WANG H,et al. Experimental research on seismic of rc frames with energy conservation masonry infill walls[J]. Journal of Hunan University(Natural Sciences),2014,41(1):15—20.(In Chinese)
[11]阎红霞,杨庆山.多遇地震下填充墙侧向刚度对RC框架结构抗震性能的影响[J].土木工程学报,2012,45(A1):54—60.YAN H X,YANG Q S. The influence of infill wall lateral stiffness on the seismic performance of RC frame structures under small earthquakes[J]. China Civil Engineering Journal,2012,45(A1):54—60.(In Chinese)
[12] DANIELE R T,TAKSIAH A M,BAMBANG B. The use of steel damper for enhancing the seismic performance of rc frame with soft first story[J]. Journal of Civil Engineering Research,2014,4(3A):191—202.
[13] KONSTANTINOS M,KONSTANTINOS K. The role of masonry infills on the damage response of R/C buildings subjected to seismic sequences[J]. Engineering Structures,2017,131:459—476.
[14]GB 50011—2016建筑抗震设计规范[S].北京:中国建筑工业出版社,2016:31—47.GB 50011—2016 Code for seismic design of buildings[S].Beijing:Building Industry Press of China,2016:31—47.(In Chinese)
[15]JGJ 3—2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010:29—41.JGJ 3—2010 Technical specification for concrete structures of tall buildings[S]. Beijing:Building Industry Press of China,2010:29—41.(In Chinese)
[16]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006:500—533.Beijing jin-tu-mu software technology company,China institute of building standard design&research. Chinese use guide for SAP2000[M]. Beijing:China Communications Press,2006:500—533.(In Chinese)
[17] FEMA. NEHRP guidelines for the seismic rehabilitation of buildings,ReportFEMA356[R]. Washington DC:FEMA356,2000:7—1—7—29.
[18]GB 50003—2011砌体结构设计规范[S].北京:中国建筑工业出版社,2011:11—20.GB 50003—2011 Code for design of masonry structures[S].Beijing:Building Industry Press of China,2011:11—20.(In Chinese)
[19]黄靓,施楚贤,吕伟荣.对框架填充墙结构抗震设计的思考[J].建筑结构,2005,35(8):27—29.HUAGN L,SHI C X,L譈W R. Some aspects of seismic design method of infilled wall-frame structures[J]. Building Structure,2005,35(8):27—29.(In Chinese)