:针 对钢框 架一混凝 土芯 筒混合 结构 的不足 ,提 出 了钢框 架一屈 曲约束 支撑一混凝 土芯 筒 多重混合
结构形 式 。根 据刚度 相等 原 则 ,建 立 了多重钢一混凝 土混合 结 构的 简化 力学模 型 ,给 出 了框 架 、支撑
钢 架和混 凝土 芯筒 的刚度 计算公 式 ,根 据 弹性理论 推 导 出 了结构 的平衡 微分 方程 ,依 据边 界条件 得
到 了在 倒 三 角水平荷 栽 、均 布水 平荷 载和顶 点 集 中水 平荷 载 作 用 下侧 移和 内力 的 tJ目J-a-化 算 法 ,最后 ,
对简化算法的可靠性进行 了验证 。结果表明:该算法具有优 良的精度 ,且应用简便 ,可供 工程设计
人 员采用 。
关键词 :钢 框 架一混凝 土 芯筒混合 结 构 ;屈 曲约束 支撑 ;水平 荷载 ;平衡微 分方 程
中图分类 号 :TU375.4 文献标 志码 :A
Sim plified Com putation Algorithm of New M ulti-lateral Resistant
Stee卜cOncrete M ixed Structure Under Lateral Load
LI Liang ,LI Guo—qiang ,W ANG Li
(1.School of Civil Engineering,Chang’an University,Xi’an 710061,Shaanxi,China;2. State K ey
Laboratory for Disaster Reduction in Civil Engineering,Tongji University,
Shanghai 200092,China)
Abstract:According to the shortage of steel frame and concrete core canister mixed structure,the
steel frame-buckling constraint brace—concrete COre m ulti—lateral resistant mixed structure was put
forward. Simplified mechanical m odel of multi—lateral resistant steel—eoncrete mixed structure was
established based on the stiffness equation principle. Stiffness calculation formulae of frame,
brace steel fram e and concrete tube were given,and the equilibrium differential equations of the
structure were deduced according to the elastic theory. Then the lateral and internal force
sim plified algorithms were deduced based on boundary conditions under the inverted triangle
lateral load,uniform ly lateral load and top—concentrated lateral load. Finally,the reliabilitv of the
simplified algorithm was verified. The results show that the simplified algorithm has good
accuracy,and it is easy for application,and can be applied for the engineering designers.
Key words:steel frame and concrete core canister mixed structure;buckling constraint brace:lat—
era1 load;equilibrium differential equation
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