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    孫振，鄒力強(qiáng)，施從偉
    (上海建筑設(shè)計(jì)研究院有限公司，上海200041)

[摘要] 本文根據(jù)某商業(yè)工程實(shí)例，介紹了有偏心集中荷載的建筑物鋼結(jié)構(gòu)大跨連接天橋的設(shè)計(jì)中需要考慮和分析的關(guān)鍵問(wèn)題——行走舒適度。分別從造型、舒適度、經(jīng)濟(jì)性等方面出發(fā)，合理分析計(jì)算，著重分析了一種經(jīng)濟(jì)有效的措施，不增加主結(jié)構(gòu)桿件截面，提高這類天橋結(jié)構(gòu)剛度來(lái)滿足舒適度的設(shè)計(jì)要求。
[關(guān)鍵詞] 鋼桁架大跨天橋；共振；固有頻率；只受拉單元

Analysis of the comfortability in designing the Long-span steel truss connective bridge withstanding eccentric concentrated loads
Sun Zhen, Zou Liqiang, Shi Congwei
(Shanghai lnstitute of Architectural Design & Research Co., Ltd., Shanghai 200041,China)

Abstract: This article, based on an example of a commercial building project, introduces comfortability which is the key factor of designing the Long-span steel truss cormective bridge withstanding eccentric concentrated loads that needs considering and analyzing. It makes logical analyses from the aspects of the appearance, comfortability and economy respectively, emphasizes the analysis of an economical and efficient measure, which can meet the comfortability requirement through increasing the stiffness of this kind of structure but not enlarge the sections of the main structural members.
Keywords: long-span steel truss bridge; resonance; natural frequency; unit only bearing pull