几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量  


返回   几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 » 三维空间:产品设计或CAX软件使用 » CAD设计 » 产品功能分析
用户名
密码
注册 帮助 会员 日历 银行 搜索 今日新帖 标记论坛为已读


 
 
主题工具 搜索本主题 显示模式
旧 2009-09-09, 12:35 PM   #1
huangyhg
超级版主
 
huangyhg的头像
 
注册日期: 04-03
帖子: 18592
精华: 36
现金: 249466 标准币
资产: 1080358888 标准币
huangyhg 向着好的方向发展
默认 flitch plate beam

flitch plate beam
how can i analyze acomposite flitch plate beam, 20 ft. long, 3/8 steel plate by 9 in. sandwiched between 2 - 2x12,bolted with 3/8" carriage bolts on 12" centers? by hand, no software. need it this week.
find a job or post a job opening
the load is shared in proportion to the stiffness of the two elements, i.e. the product of e x i.
in addition, shear flow between the different materials must be calculated. if the steel plate is not dead center of the 2x12's and the 3/8" bolts also are not at the center, number of bolts have to be calc'd to justify that the load can be shared based on the stiffnesses of each pieces.
conservative answer - consider the steel plates as doing all the work, forget about the wood.
pylko, nice answer.
steel plate should only be designed to carry bending only. reactions at each end (bearing) should be checked with 2-2x12's.
see my thread here on flitches.
inspector jeff in florida
there is a two-page article in the september 1989 issue of civil engineering magazine on flitch beam design. the article is by j. d. wiesenfeld, who was (is?) a professor at the new york institute of technology's school of architecture.
thanks guys! really preciate the help on the flitch plate beam. this was a garage door lintel that the building inspector turned down. i was asked to look at and make it work.
my first time. it's the best thing that has happened for engineers.
thanks again.
as stated before you may design plate to take full bending. space bolts to provide lateral support to steel plate. also, if considering both wood and steel, bolts must be sized and spaced to transfer load to wood side plates...good luck.
design the steel plate as a beam and forget the 2x except to distribute the bearing end stresses..
inspector jeff in florida
__________________
借用达朗贝尔的名言:前进吧,你会得到信心!
[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]
huangyhg离线中   回复时引用此帖
GDT自动化论坛(仅游客可见)
 


主题工具 搜索本主题
搜索本主题:

高级搜索
显示模式

发帖规则
不可以发表新主题
不可以回复主题
不可以上传附件
不可以编辑您的帖子

vB 代码开启
[IMG]代码开启
HTML代码关闭

相似的主题
主题 主题发起者 论坛 回复 最后发表
flitch plate beam for porch huangyhg 产品功能分析 0 2009-09-09 12:34 PM
bearing plate huangyhg 产品功能分析 0 2009-09-07 03:17 PM
beam theory vs. plate theory huangyhg 产品功能分析 0 2009-09-07 03:06 PM
12 x 6.5x 38 thick x 41 residential basement i-beam con huangyhg 产品功能分析 0 2009-09-06 10:30 PM
10 ft continuous weld beam to cover plate huangyhg 产品功能分析 0 2009-09-06 10:26 PM


所有的时间均为北京时间。 现在的时间是 08:12 AM.


于2004年创办,几何尺寸与公差论坛"致力于产品几何量公差标准GD&T | GPS研究/CAD设计/CAM加工/CMM测量"。免责声明:论坛严禁发布色情反动言论及有关违反国家法律法规内容!情节严重者提供其IP,并配合相关部门进行严厉查处,若內容有涉及侵权,请立即联系我们QQ:44671734。注:此论坛须管理员验证方可发帖。
沪ICP备06057009号-2
更多