摘要
结合混凝土综合管廊现存问题及混凝土材料局限性,提出一种薄壁钢箱综合管廊。此种管廊采取薄壁钢箱结构,同时配有环状矩形加劲肋以提高强度。分析薄壁钢箱结构综合管廊结构形式和优势。采用通用结构分析与设计软件Midas Gen,通过有限元实例计算验证,单舱、双舱管廊整体受力均较为均匀,无明显应力集中点。对单舱管廊和双舱管廊,从结构受力和节约材料的角度,加载同样的荷载,选取3种不同结构参数组合进行分析。筛选出单舱综合管廊选用钢材标号Q345,组合为钢箱壁厚30 mm,加劲肋厚度25 mm,加劲肋间距200 mm,加劲肋高度50 mm。双舱综合管廊选用钢材标号Q390,组合为钢箱壁厚20 mm,加劲肋厚度20 mm,加劲肋间距100 mm,加劲肋高度50 mm。提出未来的研究方向可聚焦于管廊特殊区域的结构分析及钢结构管廊的防火、防腐处理。
Combined with the extant problems of concrete utility tunnel and the limitations of concrete materials,a thin-walled steel box utility tunnel is proposed. This utility tunnel adopts a thin-walled steel box structure with annular rectangular stiffening rib to improve the strength. The structural form and advantages of the utility tunnel with thin-walled steel box structure are analyzed. The general structural analysis and design software Midas Gen are adopted,through the finite element example calculation,it is verified that the overall force of the single-compartment and double-compartment utility tunnels is relatively uniform,and there is no obvious stress concentration point. The single-compartment utility tunnel and the double-compartment utility tunnel are analyzed from the perspectives of structural stress and material saving,by loading the same load and selecting three different structural parameter combinations. It is screened out that the single-compartment utility tunnel adopts the steel grade Q345,with a combination of steel box wall thickness of 30 mm,stiffening rib thickness of 25 mm,stiffening rib spacing of 200 mm and stiffening rib height of 50 mm. The double-compartment utility tunnel adopts the steel grade Q390,with a combination of steel box wall thickness of 20 mm,stiffening rib thickness of 20 mm,stiffening rib spacing of 100 mm and stiffening rib height of 50 mm. It is proposed that the future research direction can focus on the structural analysis of the special area of the utility tunnel and the fire prevention and anti-corrosion treatment of the steel structure utility tunnel.
出处
《煤气与热力》
2018年第10期49-54,共6页
Gas & Heat
关键词
综合管廊
薄壁钢箱结构
钢结构
有限元分析
设计软件Midas
GEN
utility tunnel
thin-walled steel box structure
steel structure
finite element analysis
design software Midas Gen
