弯扭柱-螺旋梁观光塔结构体系研究  

Research on the Structure System of Bending-Torsion Columns and Spiral Beam Sightseeing Tower

作　　者：刘向刚 陈剑峰 杨越 刘博伟 封竺汐 LIU Xianggang;CHEN Jianfeng;YANG Yue;LIU Bowei;FENG Zhuxi(CMCU Engineering Co.,Ltd.,Chongqing 400039,China)

机构地区：[1]中机中联工程有限公司,重庆400039

出　　处：《工业建筑》2024年第9期115-124,共10页Industrial Construction

摘　　要：根据某实际工程的建筑造型和结构特点,提出了一种由3根弯扭柱和1根螺旋梁组成的观光塔塔身结构体系,详细分析了柱子扭转角度θ、螺旋梁旋转方向、结构直径D和螺旋梁圈数n对结构体系的周期、位移(侧向刚度)、构件受力和结构稳定的影响规律。结果表明:柱子扭转角度θ在研究参数范围内增加对结构受力不利,结构直径D和螺旋梁圈数n对结构受力有一定影响,但影响程度要小于柱子扭转角度θ,弯扭柱扭转方向与螺旋梁扭转方向相反时更有利于结构整体稳定;当柱子扭转角度在研究参数范围内(θ=0°~360°)增加时,结构侧向刚度降低,结构直径在研究参数范围内(D=5~8 m)增加时,结构侧向刚度减小;螺旋梁圈数在研究参数范围内(n=7~11)增加时,结构侧向刚度增大;弯扭柱与螺旋梁旋转方向相反时有利于增大结构的侧向刚度。基于螺旋弹簧横向静刚度理论建立了弯扭柱-螺旋梁结构的侧向刚度计算公式,公式计算结果与软件计算结果吻合良好。According to the architectural shape and structural characteristics of an actual project,a structural system of sightseeing tower consisting of three twisted columns and one spiral beam was proposed,and the influence laws of column twisting angleθ,spiral beam rotation direction,structural diameter D and number of spiral beam turns n on the period,displacement(lateral stiffness),member force and structural stability of the structural system were analyzed in detail.The analysis results showed that the increase of column twisting angleθin the range of the studied parameters was unfavorable to the structural force,and the structural diameter D and the number of spiral beam turns n had some influence on the structural force,but the degree of influence of number of spiral beam turns n was smaller than that of column twisting angleθ.The torsion direction of the bending-torsion column was more favorable to the overall stability of the structure when the torsion direction was opposite to that of the spiral beam.The lateral stiffness of the structure decreased when the column twisting angle increased within the studied parameters(θ=0°-360°),and the lateral stiffness of the structure decreased when the structural diameter increased within the studied parameters(D=5-8 m).The lateral stiffness of the structure increased when the number of spiral beam turns increased within the studied parameters(n=7-11).The lateral stiffness of the structure increased when the bent and twisted column was rotated in the opposite direction to the spiral beam.Based on the coil spring transverse static stiffness theory,the lateral stiffness calculation formula of the bending-torsion column and spiral beam structure was established,and the formula calculation results were in good agreement with the software calculation results.

关 键 词：弯扭柱-螺旋梁 扭转角 受力特点 屈曲分析 侧向刚度 

分 类 号：TU31[建筑科学—结构工程]