摘要
高层钢框筒结构通常由水平荷载起控制作用,用轴压比和等效实膜筒法确定的截面尺寸较粗糙,需反复试算和调整,耗费大量人力与机时.针对这个问题,提出了高层钢框筒构件截面尺寸预估的新方法,综合考虑了强柱弱梁思想、结构受力特性和设计经验,并用2个算例验证了预估方法的有效性,同时对它们进行了倒三角分布、SRSS分布和高度等效分布侧向力模式下的Pushover分析和比较,讨论了考虑摇摆柱影响的放大系数简化计算和预估轴压比计算的可行性.该预估方法可较快预估出满足规范要求的构件尺寸,对不同抗震设防区的高层钢框筒结构的构件尺寸预估均适用,不过初始截面尺寸仍需进一步优化.该方法可供其他高层钢结构形式的构件尺寸预估参考.
Design of high-rise steel framed-tube structure is usually controlled by horizontal load,and the cross-sectional dimension determined by axial compression ratio or equivalent membrane tube method is not effective,which need to be adjusted again and again with a lot of manpower and machine time.To address this problem,a new method for estimating section dimension of high-rise steel framed-tube structure is put forward,which considers strong column weak beam concept,mechanical characteristics and design experience comprehensively,and two examples are used to verify the effectiveness of the estimation method.At the same time,Pushover analysis of two examples are carried out under inverted triangle distribution,SRSS distribution and highly equivalent distribution lateral load pattern.Their results are compared.The feasibility of simplified calculation of magnification coefficient with influence of swing columns and calculation of estimated axial compression ratio is discussed.The method can quickly estimate component dimension to meet the requirements of design specifications,and it is suitable for component dimension estimation of high-rise steel framed-tube structure in different seismic fortification areas.Initial section dimension still needs to be further optimized.The method can be used as a reference for member dimension estimation of other high-rise steel structures.
作者
关彬林
连鸣
苏明周
程倩倩
GUAN Binlin;LIAN Ming;SU Mingzhou;CHENG Qianqian(School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China)
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2018年第4期526-535,共10页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金(51708444)
陕西省高校科协青年人才托举计划项目(20170517)
陕西省博士后科研资助项目(2017)
陕西省自然科学基础研究计划项目(2018JQ5074)
关键词
钢框筒
截面尺寸
摇摆柱
强柱弱梁
PUSHOVER分析
steel framed-tube
section dimension
swing column
strong column weak beam
Pushover analysis
