1-工业厂房分析设计-美标.pdf

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1、工业厂房分析设计33目录工业厂房分析设计································································································35概述··················································································································351、简介··········································

2、···································································362、建模和荷载要点······························································································373、移动荷载分析控制·····························································································84、分析

3、并查看结果································································································95、荷载组合说明·································································································126、一般设计参数定义及说明····························································

4、······················137、钢构件设计参数定义及说明···············································································158、钢构件设计验算······························································································15工业厂房分析设计概述该例题主要介绍使用midasGen对工业厂房进行分析设计的方法。步骤如下:1.简介2.建模和荷载

5、要点3.移动荷载分析控制4.分析并查看结果5.荷载组合说明6.一般设计参数定义及说明7.钢结构设计参数定义及说明8.钢构件设计验算351、简介此例题介绍使用midasGen对工业厂房进行分析设计的方法。例题模型为钢结构单层门式刚架厂房。(该例题数据仅供参考)图1某门式刚架厂房基本数据如下：材料：ASTM:A588-40柱截面：W21x201吊车梁截面：W14x61变截面刚架梁截面：600~400x300x10/14牛腿截面：600~250x300x6/10支撑截面：P160x5系杆截面：P194x12柱距：6m厂房跨度：21m柱高：10m

6、钢梁夹角：9度短周期反应谱加速度Ss：0.751秒反应谱加速度S1：0.3场地：C类吊车参数：吊车跨度19.5m，吊车最大荷载7.9吨2、建模和荷载要点1变截面梁的输入主菜单中选择模型>材料和截面特性>截面>添加>变截面，如图2所示：注：模型中牛腿以及门式刚架梁为变截面。图2变截面372主菜单选择风荷载的输入对于钢结构厂房，风荷载的输入方法有以下3种：一：人工计算出来，然后分配到梁或者节点上。二：建立虚面，然后对其施加压力荷载来替代风荷载。三：主菜单选择荷载>风荷载，这种风荷载施加主要考虑层概念清晰的项目1）本模型采用第一种方法，如图3所示：注：虚

7、面是指厚度比较薄以及弹性模量很小的面，仅仅是为了导荷载。图3风荷载输入2）主菜单选择荷载>风荷载：自动风荷载施加图4风荷载输入（1）地形效应：当建筑物、其他场地条件和结构位置满足特定条件（具体见ASCE/SEI7-1026.8.1节）时，需考虑在任意暴露类别下，风经过整体地形上有急剧变化的孤山、山脉和悬崖时的风速增大计算设计风荷载时，用地形系数K来考虑风速增大效应。K由按下式确ztzt定：K=(1+KKK)²Z12339表1地形系数暴露类别C的地形乘数H/LhK1乘数x/LhK2乘数z/LhK3乘数2-D2-D3-D2-D所有2-D2-D3-D山脊悬崖对称悬

8、崖其他山脊悬崖对称小山小山情况0.200.290.1