如何理解非钢板墙不宜承担竖向荷载
Understanding the Demand on Steel Plate Walls Carrying No Gravitational Loads
童根树1
作者信息
- 1. 浙江大学高性能结构研究所,杭州 310058
- 折叠
摘要
GB 50017-2017《钢结构设计标准》针对钢板墙会提出不承担重力荷载的要求.但实际项目中难以做到不承担竖向荷载,这一要求阻碍了钢板墙的应用.为此,对钢板墙、人字撑、交叉支撑和防屈曲支撑进行了分析,指出这些抗侧力构件承担的重力荷载在抗震弹塑性过程中都会出现卸载现象,在设计时事先不考虑其承担竖向荷载是为了保证两侧立柱截面和钢梁尺寸足够,以承接在弹塑性响应过程中的重力往立柱重分布.这一解读为钢板墙设计提供了补充设计要求,也为钢板墙的应用增添了信心.
Abstract
GB 50017-2017 Standard for Design of Steel Structures put a special demand on steel plate wall(SPW)avoiding carrying gravitational load.Because of the difficulty of realizing this demand,this clause prohibited application of SPW.Unloading of gravitational loads occurring in SPW,chevron and cross braces and buckling-restrained braces during the plastic response under earthquake are pointed out in this article,and therefore,requiring the SPW carrying no gravitational load in the design stage has the results that the boundary columns and beams are prepared to receive such unloading.Such an explanation provides an additional design requirement of SPW,and increases the confidence of using SPW.
关键词
钢板墙/内力重分布/缺陷因子Key words
steel plate wall/force redistribution/imperfection factor引用本文复制引用
出版年
2024
NETL
NSTL
万方数据