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【提要】 根據(jù)鋼結(jié)構(gòu)錯(cuò)列桁架的組成特點(diǎn)，推導(dǎo)出評(píng)定水平荷載作用下扭轉(zhuǎn)效應(yīng)系數(shù)的計(jì)算公式，并通過(guò)模型計(jì)算考察《高層民用建筑鋼結(jié)構(gòu)技術(shù)規(guī)程》(JGJ99—98)第3.2.2條是否適用于鋼結(jié)構(gòu)錯(cuò)列桁架。計(jì)算結(jié)果表明：規(guī)程第3.2.2條的判定條件并不適用于鋼結(jié)構(gòu)錯(cuò)列桁架體系，計(jì)算時(shí)應(yīng)該考慮結(jié)構(gòu)扭轉(zhuǎn)的影響。
【關(guān)鍵詞】 錯(cuò)列桁架 扭轉(zhuǎn)效應(yīng) 鋼結(jié)構(gòu)設(shè)計(jì)
Torsional Effect Evaluation of Steel Staggered Truss System/Lu Linfeng1,Gu Qiang2,Su Mingzhou3,Zhou Tianhua1(1 Changan University,Xian 710061,China; 2 Suzhou University of Science and Technology,Suzhou 215011,China; 3 Xian University of Architecture and Technology,Xian 710055,China)
Abstract:According to the composition characteristics of steel staggered truss under leve
l load,the calculating formula of the torsional effect coefficient was derived,and it investigates whether the clause 322 of the Technical specification for steel structure of tall building(JGJ99—98) is applicable to the steel staggered truss or not.The calculating result indicates that the specification is not applicably,and the torsional influence should be considered.
Keywords:staggered truss; torsional effect; steel structure design
*陜西省自然科學(xué)基金資助項(xiàng)目(20013C1)。
1)長(zhǎng)安大學(xué)，西安，710061；2)蘇州科技學(xué)院，215011；3)西安建筑科技大學(xué)，710055。