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


回复
 
主题工具 搜索本主题 显示模式
旧 2009-09-08, 06:35 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 diaphragm and continuous struttie design

diaphragm and continuous strut/tie design
i am currently working on a large warehouse structure utilizing tilt-up construction for the perimeter walls. i have an open web steel joist roof structure covered with metal decking. due to the size of the structure and a step in the roof plane, i have 3 individual diaphragms to design.
i am in seismic design category c (2006 ibc) and seismic is definitely controlling due to the weight of the tilt-up panels (45' to top of parapet).
the question i have concerns the out of plane forces generated by the tilt-up walls. in transferring the forces into the diaphragm, i am creating smaller sub-diaphragms to collect the load to my continuous struts/ties. my continuous strut/tie will be either an open web joist or joist girder at my column lines.
my questions are as follows:
1) do the strut/tie forces need to be carried across the entire length of the building, making sure each connection to the column and next strut/tie in line can carry this force? or do i account for them until i have an adequate diaphragm length to dissipate the force, similar to how a collector element between shear walls or braced frames?
2) how should i contend with the strut/tie force in the design of the open web joist/girder? is this as simple as noting an axial load on the plan for the open web joist/girder designer to content with? this seems right, but i have never seen such forces noted on other structural drawings before. the sub-diaphragms will require a joist/girder to be a chord element. i would imagine this force should be shown on the plan as well.
any help and/or thoughts would be greatly appreciated.
find a job or post a job opening
1) the fasteners between deck and joist take the axial force out of the joist, and put it into the deck diaphragm. the number of fasteners required to do this will determine how far the force in the joist must travel.
2) joist suppliers are accustomed to seeing special load requests. what you are proposing is not that unusual.
daveatkins
__________________
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)
回复


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
chord force in a concrete filled diaphragm huangyhg 产品功能分析 0 2009-09-07 11:37 PM
chord force adjacent to cmu wall huangyhg 产品功能分析 0 2009-09-07 11:37 PM
cantilever retaining wall or no huangyhg 产品功能分析 0 2009-09-07 10:39 PM
bond beam as diaphragm chord huangyhg 产品功能分析 0 2009-09-07 04:18 PM
beams braced with a welded flat steel plate huangyhg 产品功能分析 0 2009-09-07 03:12 PM


所有的时间均为北京时间。 现在的时间是 07:33 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