支撑形式对巨型柱受力性能的影响  

Influence of bracing forms on mechanics behavior of mega columns

作　　者：张令心[1] 徐国林[2] 刘洁平[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]西南林学院,云南昆明650224

出　　处：《土木工程学报》2010年第S1期192-199,共8页China Civil Engineering Journal

基　　金：中国地震局工程力学研究所基本科研业务费专项资助(2007A02);国家重点基础研究发展计划(2007CB714200)

摘　　要：采用具有良好计算精度和计算效率的4节点减缩积分三维壳单元模型作为巨型柱的非线性分析模型,选用具有强大非线性反应分析功能的MSC.Marc软件作为分析工具,利用该软件中CPU双核并行运算技术提高计算效率。对含X形中心支撑、V形中心支撑和偏心支撑的巨型柱进行单调水平荷载和循环往复荷载作用下的非线性反应分析,比较研究三种不同支撑形式巨型柱在不同支撑长细比、不同轴压比情况下的刚度、屈服剪力、延性及耗能能力,给出巨型柱中不同支撑长细比下支撑形式的建议。研究结果可为巨型柱设计时支撑杆件的选取提供理论依据。A 4-node reduced integration shell element,which has high accuracy and computation efficiency,was adopted to model the mega column.The FEM software MSC.Marc was regarded as the analytical implement.The parallel computation technique in MSC.Marc was explored to increase the computation efficiency.The nonlinear response analysis of mega columns with X-shaped central bracing,V-shaped central bracing and eccentrical bracing under monotonic horizontal load and cyclic load was achieved,respectively.The stiffness,yield shear force,ductility and energy dissipation ability of mega columns with three bracing forms in the case of various length to slenderness ratios and axial compression ratios were compared and the suggestion of bracing form under various length to slenderness ratios was given.The results lay the theoretical foundation of choosing bracing form in the design.

关 键 词：支撑形式 巨型柱 三维壳单元 受力性能 

分 类 号：P315[天文地球—地震学]