钢铅组合防屈曲支撑的滞回性能与参数研究
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摘要
为简化防屈曲支撑的加工工艺,提高防屈曲支撑的初始刚度和在小变形下的耗能能力,基于现有防屈曲支撑在截面形式与构造方式上的特点,提出了一种新型钢铅组合防屈曲支撑并进行了构造设计。通过有限元数值模拟,分析了钢铅组合防屈曲支撑的耗能特性与效果,建立了恢复力简化模型,并根据理想弹塑性材料本构关系推导出滞回规则。通过对不同设计参数的理论分析和数值模拟,分析了钢铅屈服力比、铅剪切面长宽比、核心段宽厚比和耗能段长度等参数对防屈曲支撑滞回性能的影响。研究结果表明,钢铅组合防屈曲支撑能够提供较大的抗侧刚度,耗能效果良好,加工工艺简单,适合工程应用。
Based on the cross-section and construction characteristics of existing BRBs,the concept of steel-lead mixed BRB is proposed in order to simplify the manufacture process,improve the capacity of dissipating energy and increase the stiffness in small deformation,and the construction is designed.According to the results of finite element analysis,the features and effect of dissipating energy of steel-lead mixed BRB is analyzed,a simple resilience model is obtained,and the hysteretic rules are summed up according to the ideal elasto-plastic material constitutive relation.By the theoretical analysis and FEA of different design parameters,the influence of steel-lead yield load ratio,lead shear plane length-width ratio,core segment width-thickness ratio and length of core segment on hysteretic characteristics of BRB is analyzed. The result of analysis shows that steel-lead mixed BRB provides larger stiffness to resist lateral deformation, has good effect in energy dissipation,and it is easy to manufacture and useful in engineering application.
Based on the cross-section and construction characteristics of existing BRBs,the concept of steel-lead mixed BRB is proposed in order to simplify the manufacture process,improve the capacity of dissipating energy and increase the stiffness in small deformation,and the construction is designed.According to the results of finite element analysis,the features and effect of dissipating energy of steel-lead mixed BRB is analyzed,a simple resilience model is obtained,and the hysteretic rules are summed up according to the ideal elasto-plastic material constitutive relation.By the theoretical analysis and FEA of different design parameters,the influence of steel-lead yield load ratio,lead shear plane length-width ratio,core segment width-thickness ratio and length of core segment on hysteretic characteristics of BRB is analyzed. The result of analysis shows that steel-lead mixed BRB provides larger stiffness to resist lateral deformation, has good effect in energy dissipation,and it is easy to manufacture and useful in engineering application.
引文
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[17]李冀龙,欧进萍.铅剪切阻尼器的阻尼力模型与设计[J].工程力学,2006,23(4):67-73. Li J L,Ou J P.Damping force models and designs of lead shear dampers[J].Engineering Mechanics, 2006,23(4):67-73.
[18]邓训,徐远杰.材料力学[M].武汉:武汉大学出版社,2002. Deng X,Xu Y J.Mechanics of Materials[M]. Wuhan:Wuhan University Press,2002.
[2]Black C.Component testing,stability analysis and ??characterization of buckling-restrained unbonded braces[R].Berkeley:University of California,2002. 33-71.
[3]蔡克铨,黄彦智,翁崇兴.双管式挫屈束制(屈曲约束)支撑之耐震行为与应用[J].建筑钢结构进展, 2005,7(3):1-8. Cai K Q,Huang Y Z,Weng C X.Seismic performance and applications of double-tube buckling-restrained braces[J].Progress in Steel Building Structures, 2005,7(3):l-8.
[4]郭彦林,刘建彬,蔡益燕,等.结构的耗能减震与防屈曲支撑[J].建筑结构,2005,35(8):18-23. Guo Y L,Liu J B,Cai Y Y,et al.Structural energy dissipation and seismic mitigation method and buckling -restrained brace[J].Building Structure,2005, 35(8):18-23.
[5]赵俊贤,吴斌.防屈曲支撑的工作机理及稳定性设计方法[J].地震工程与工程振动,2009,39(3):131- 139. Zhao J X,Wu B.Working mechanism and stability design methods of buckling-restrained braces[J]. Journal of Earthquake Engineering and Engineering Vibration,2009,39(3):131-139.
[6]程光煜,叶列平,许秀珍,等.防屈曲耗能钢支撑的试验研究[J].建筑结构学报,2008,29(1):31-39. Cheng G Y,Ye L P,Xu X Z,et al.Experimental researches on buckling-restrained brace[J].Journal of Building Structures,2008,29(1):31-39.
[7]梅洋,吴斌,赵俊贤,等.组合钢管混凝土式防屈曲支撑[J].灾害学,2010,(25):99-104. Mei Y,Wu B,Zhao J X,et al.Buckling-restrained braces with combined concrete-filled steel tubes[J]. Journal of Catastrophology,2010,(25):99-104.
[8]高向宇,张慧,杜海燕,等.组合热轧角钢防屈曲支撑构造及抗震试验[J].北京工业大学学报,2008, 34(5):498-538. Gao X Y,Zhang H,Du H Y,et al.Experiment on conformation and seismic performance of buckling-restrained brace made of composed hot-rolled angle steel[J].Journal of Beijing University of Technology, 2008,34(5):498-538.
[9]高向宇,杜海燕,张惠,等.国标Q235热轧钢材防屈曲支撑抗震性能试验研究[J].建筑结构,2008,38 (3):91-95. Gao X Y,Du H Y,Zhang H,et al.Experimental study on seismic performance of buckling-restrained brace made of Q235 hot-rolled steel in China[J]. Building Structure,2008,38(3):91-95.
[10]高向宇,王永贵,刘丹卉,等.端部加强型组合热轧角钢防屈曲支撑静载试验研究[J].建筑结构学报, 2010,31(3):77-82. Gao X Y,Wang Y G,Liu D H,et al.Static tests on buckling restrained brace made of hot-rolled steel angle with strengthened ends[J].Journal of Building Structures,2010,31(3):77-82.
[11]郭彦林,江磊鑫.双矩管带肋约束型装配式防屈曲支撑的设计方法[J].建筑科学与工程学报,2010,27 (2):67-82. Guo Y L,Jiang L X.Design method of buckling-restrained braces assembled with dual ribbed rectangular hollow[J].Journal of Architecture and Civil Engineering, 2010,27(2):67-82.
[12]郭彦林,江磊鑫.型钢组合装配式防屈曲支撑性能及设计方法研究[J].建筑结构,2010,40(1):30-37. Guo Y L,Jiang L X.Behavior and application of buckling-restrained braces assembled with section steels[J].Building Structures,2010,40(1):30-37.
[13]郭彦林,王小安,江磊鑫.装配式防屈曲支撑构件及框架设计理论[J].结构工程师,2010,26(6):164- 176. Guo Y L,Wang X A,Jiang L X.Design theory of assembled buckling-restrained braces and buckling-re- ??strained braced frames[J].Structural Engineers, 2010,26(6):164-176.
[14]周云,邓雪松,钱洪涛,等.开孔式三重钢管防屈曲耗能支撑性能试验研究[J].土木工程学报,2010, 43(9):77-87. Zhou Y,Deng X S,Qian H T,et al.An experimental study of the perforation-type triple-steel tube buckling -restrained brace[J].China Civil Engineering Journal,2010,43(9):77-87.
[15]GB 50011-2001,建筑抗震设计规范[S].
[16]李松瑞.铅及铅合金[M].长沙:中南工业大学出版社,1996. Li S R.Lead and Lead Alloy[M].Changsha:Central South University of Technology Press,1996.
[17]李冀龙,欧进萍.铅剪切阻尼器的阻尼力模型与设计[J].工程力学,2006,23(4):67-73. Li J L,Ou J P.Damping force models and designs of lead shear dampers[J].Engineering Mechanics, 2006,23(4):67-73.
[18]邓训,徐远杰.材料力学[M].武汉:武汉大学出版社,2002. Deng X,Xu Y J.Mechanics of Materials[M]. Wuhan:Wuhan University Press,2002.
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