起重機空腹桁架橋架結構及特點介紹

如圖6-25所suo示shi，這zhe種zhong橋qiao架jia的de主zhu梁liang是shi由you鋼gang板ban組zu成cheng的de封feng閉bi截jie麵mian。從cong主zhu梁liang的de每mei一yi個ge橫heng截jie麵mian來lai看kan
，是shi一yi個ge無wu斜xie撐cheng杆gan的de空kong腹fu桁heng架jia。這zhe種zhong空kong腹fu桁heng架jia與yu一yi般ban桁heng架jia不bu同tong，它ta不bu是shi用yong型xing鋼gang杆gan件jian焊han成cheng，而er是shi在zai鋼gang板ban上shang切qie割ge許xu多duo窗chuang口kou形xing成cheng，為wei了le提ti高gao強qiang度du和he剛gang度du，在zai主zhu
、fuhengjiapingmiandechuangkoubianshangxiangyoubantiaohuoxinggangdekuangjia。zhezhongjiegoujianyouxiangxingjiegouhesihengjiajiegoudeyoudian，zizhongjiaoqing，zhengtigangxinghao，zhuangpeijianxiugongzuotiaojiandaweigaishan
，waixingmeiguan。

我國生產的100-250tqiaoshiqizhongjiheyejinqizhongjiduocaiyongzheleijiegou。zheleijiegouzaijutishejihezhizaoshangyeyouchayi

，muqiancaiyongdeshizhuhengjiazuochengshifugongziliang
，fuhengjiazuochengkongfujiegou，shang、下xia水shui平ping桁heng架jia可ke以yi是shi空kong腹fu結jie構gou也ye可ke以yi是shi帶dai斜xie杆gan的de一yi般ban桁heng架jia結jie構gou。它ta與yu四si桁heng架jia結jie構gou不bu同tong之zhi處chu是shi用yong橫heng向xiang框kuang形xing剛gang架jia取qu代dai四si桁heng架jia結jie構gou中zhong的de斜xie撐cheng杆gan
，以yi保bao持chi主zhu梁liang的de整zheng體ti剛gang性xing。這zhe類lei結jie構gou的de缺que點dian是shi，比bi箱xiang形xing結jie構gou花hua費fei的de製zhi造zao工gong時shi多duo，在zai起qi重zhong量liang大da於yu300t時，其承載能力受到限製。