摘要
由于网架结构提供两道支承作用,能够改善以少量柱间钢支撑为主要支承手段导致柱间钢支撑受力空间较大影响支承性能的问题,该文提出灾害后重建建筑空间网架结构支承性能数值模拟方法。以某省灾害后重建建筑空间网架结构为模拟对象,通过ANSYS有限元软件单元构建模拟对象5种不同支承(周边支承、对边支承、三边支承、周边多点支承以及点支承)形式下的有限元模型,并进行柱间钢支撑、阻尼器与地震波等参数设置。数值模拟分析结果显示,支承形式决定网架结构支承性能,周边支承形式下网架结构的支承性能最强;同种支承形式的网架结构中,支承性能强度随弹簧硬度系数及地震影响系数增大而变强;当阵型在前十阶时,模拟对象柱间钢支撑体系水平向质量参与系数和竖向质量参与系数分别达到91%和1.1%,表明钢支撑体系在一定程度上改变网架结构动力特性,提升网架结构支承性能。
Because the space truss structure provides two supporting functions, it can improve the problem that the bearing space of the steel support between columns is greatly affected by the small amount of steel support between columns. A numerical simulation method of the supporting performance of the space truss structure reconstruction after disaster is proposed. Taking the reconstruction of space truss structure after disaster in a province as the simulation object, the finite element model of five different supports(peripheral support, opposite support, trilateral support, peripheral multi-point support and point support) of the simulation object was constructed by ANSYS finite element software unit, and the parameters of steel support, damper and seismic wave between columns were set. The results of numerical simulation show that the support form determines the support performance of the grid structure, and the support performance of the grid structure is the strongest under the surrounding support form. In the same support form of the grid structure, the strength of the support performance increases with the increase of spring hardness coefficient and seismic influence coefficient. When the array is in the first ten steps, the horizontal mass participation coefficient and vertical mass participation coefficient of the steel support system between columns of the simulated object are increased. The mass participation coefficient reaches 91% and 1.1% respectively, which indicates that the steel support system can change the dynamic characteristics of the grid structure to some extent and improve the supporting performance of the grid structure.
作者
李久存
LI Jiucun(Northeastern University,Shenyang 110819,China)
出处
《灾害学》
CSCD
北大核心
2020年第1期16-20,共5页
Journal of Catastrophology
基金
辽宁省自然科学基金项目(201602620)
关键词
灾后重建
网架结构
支承性能
数值模拟
模型构建
结构动力
post-disaster reconstruction
grid structure
support performance
numerical simulation
model construction
structural dynamics
