摘要
由钢筋混凝土(reinforced concrete)柱和钢(steel)梁组成的结构称为RCS结构,它融合了混凝土结构和钢结构的优良特性,使其在工程领域得到了广泛运用。近年来,研究者对RCS节点及其整体结构的抗震性能进行了深入研究,但鲜有文献考虑楼板对RCS结构的抗震性能的影响。基于此,对已完成的2榀1/3缩尺RCS框架抗震性能试验进行了数值模拟和参数分析,并结合弹性理论分析得出RCS结构抗震性能的改进意见,RCS有限元模型的有效性通过试验结果得到了验证。结果表明:纵筋配筋率、配箍特征值及轴压比对RCS结构的峰值承载力和延性影响显著;钢材强度(钢梁、纵筋和箍筋)对RCS结构力学性能的影响不明显;楼板的存在间接提高了钢梁腹板的高度,进而增大了钢梁的截面惯性矩和刚度,导致结构的承载力提高,但降低了框架的延性。
RCS structure(composite of reinforced concrete columns and steel beams),integrating the advantages of concrete and steel structures,has been extensively used in the engineering area.In recent years,there has been a continuous interest towards the seismic performance of RCS joints and their overall structures.Nevertheless,previous studies on the effect of slab to seismic performance of RCS structure are still limited.Therefore,this paper carries out numerical simulation and parameter analysis of the seismic performance test of two RCS frames with 1/3 scale,and proposes some recommendations to improve the seismic performance of RCS structure based on the analysis of elastic theory.Besides,experimental results show the validity of RCS finite element model.The test results show that the longitudinal reinforcement ratio,stirrup characteristic value,and axial compressive ratio have significant influence on the peak value of bearing capacity and ductility of RCS structure.While steel strength(of steel beam,longitudinal bars,and stirrups)has no major impact to the mechanical performance of this structure.They also show that the existence of slab indirectly increases the height of steel beam webs,and thus increases second moment of area and stiffness of steel beam,which further increases the bearing capacity of the structure while reducing its ductility.
作者
王勤
李桅
杨克家
姜维山
WANG Qin;LI Wei;YANG Kejia;JIANG Weishan(College of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi'an 710055,China)
出处
《建筑钢结构进展》
CSCD
北大核心
2020年第6期56-68,共13页
Progress in Steel Building Structures
基金
国家自然科学基金(51308419)
浙江省自然科学基金(LQ13E080005)
温州市科技计划项目(S20150016、S20150017)
温州大学研究生创新基金(3162017057、3162018050)。
关键词
RCS框架结构
楼板影响
抗震性能
数值模拟
参数分析
弹性理论分析
RCS frame structure
effect of slab
seismic performance
numerical simulation
parameter analysis
elastic theory analysis
