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eaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif 钢结构课程设计计算书

一、 设计资料

某单层厂房长72m，跨度30m，柱距6m，厂房内无吊车、无振动设备，屋架铰接于混凝土柱上，屋面采用1.5x6m大型预应力钢筋混凝土屋面板，屋面构造如图1所示。

屋架采用梯形屋架，简支在钢筋混凝土柱上，混凝土标号为C25。屋架钢材选用Q235，焊条选用E43系列，手工焊。

依据《建筑结构荷载规范》（GB 50009-2012）等，屋架荷载标准值如图2所示

图2 屋架荷载标准值

二、 屋架形式和几何尺寸

屋面材料为大型屋面板，故采用无檁体系平坡梯形屋架。 计算跨度 屋面坡度

端部高度 取 中部高度 屋架几何尺寸如图3（上）所示。

iculties,shallconsistofminingorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(seeatteaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif

图3屋架几何尺寸和结构编号

三、 支撑布置

由于房屋长度有72m，故需要在房屋两端部和中间部开间设置上、下弦横向水平支撑和屋架两端及跨中处设置垂直支撑。其他屋架则在垂直支撑处分别于上、下弦设置三道系杆，其中屋脊和两支座处为刚性系杆，其余三道为柔性系杆。

（见下页）

四、 屋架节点荷载

屋面坡度较小，故对所有荷载均按水平投影面计算（不考虑风荷载） 1.5x6m 大型屋面板

100mm 厚水泥珍珠岩制品保温层 2cm1：3 水泥砂浆找平层 二毡三油防水层

屋架及支撑重量 永久荷载总和

使用活荷载（大于雪荷载）

荷载组合：

1. 全跨永久荷载＋可变荷载

由可变荷载控制：

由永久荷载控制：

故取节点荷载设计值43.8kN

2. 全跨永久荷载＋半跨可变荷载（左跨）

由可变荷载控制：

左跨： 右跨： 由永久荷载控制：

左跨： 右跨：

故取节点荷载设计值：左跨43.8kN、右跨37.7kN

3. 全跨屋架、天窗和支撑自重＋半跨檩条、屋面板＋半跨可变荷载（左跨）

由可变荷载控制：

iculties,shallconsistofminingorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(seeatteaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif 左跨： 右跨： 由永久荷载控制：

左跨： 右跨：

故取节点荷载设计值：左跨28.7kN、右跨5.5kN

五、 屋架杆件内力

经结构力学求解器计算，屋架结构编号如图3（下）所示。屋架在设计荷载作用下屋架杆件内力设计值如表1所列 表1.屋架杆件内力 种类 编号 组合1 组合2 组合3 最大值 最小值 1 259.9 250.4 134.3 259.9 134.3 2 657.1 630.3 328.7 657.1 328.7 3 872.1 831.8 418.0 872.1 418.0 4 958.7 907.4 433.3 958.7 433.3 5 919.9 855.8 359.1 919.9 359.1 下弦杆 6 919.9 855.8 359.1 919.9 359.1 7 958.7 876.4 315.2 958.7 315.2 8 872.1 791.0 263.0 872.1 263.0 9 657.1 592.4 184.5 657.1 184.5 10 259.9 233.2 68.7 259.9 68.7 11 0.0 0.0 0.0 0.0 0.0 12 -488.2 -469.4 -248.4 -248.4 -488.2 13 -488.2 -469.4 -248.4 -248.4 -488.2 14 -787.4 -753.2 -386.1 -386.1 -787.4 15 -787.4 -753.2 -386.1 -386.1 -787.4 16 -933.6 -887.3 -435.7 -435.7 -933.6 17 -933.6 -887.3 -435.7 -435.7 -933.6 18 -969.9 -913.7 -421.8 -421.8 -969.9 19 -990.5 -934.3 -435.3 -435.3 -990.5 20 -990.5 -934.3 -435.3 -435.3 -990.5 上弦杆 21 -990.5 -908.8 -338.1 -338.1 -990.5 22 -990.5 -908.8 -338.1 -338.1 -990.5 23 -969.9 -891.0 -335.5 -335.5 -969.9 24 -933.6 -849.9 -293.3 -293.3 -933.6 25 -933.6 -849.9 -293.3 -293.3 -933.6 26 -787.4 -711.9 -228.7 -228.7 -787.4 27 -787.4 -711.9 -228.7 -228.7 -787.4 28 -488.2 -439.0 -132.8 -132.8 -488.2 29 -488.2 -439.0 -132.8 -132.8 -488.2 30 0.0 0.0 0.0 0.0 0.0 竖杆 31 -24.1 -24.1 -15.8 -15.8 -24.1 iculties,shallconsistofminingorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(seeatt