如何建造一座意面桥

2015-11-05 12:54阅读：

http://blog.sina.cn/dpool/blog/u/2843144193

本站相关转帖：什么是桁架桥？http://blog.sina.cn/dpool/blog/s/blog_a976f0010102vvu4.html?vt=4，什么形状的桥体最强壮？http://blog.sina.cn/dpool/blog/s/blog_a976f0010102v6xj.html?vt=4
以下介绍直接去网站翻找，有承重比赛的视频：

https://sites.google.com/a/bcsemail.org/wdstem/bridges/how-to-build-a-bridge

http://www.sciencenc.com/event-help/tower.php

How to build a pasta bridge（如何建造一座意面桥）

This is the Pasta Bridge that Munn built!（这是Munn的作品）

Materials:（材料）
-Paper for blueprint (11 x 17 inches)（设计蓝图）
-1/2 box linguine (or spaghetti)（半包意面）
-10-12 glue sticks (4 inch mini’s)（点胶棒）
-Mini-hot glue (low-temp)（类似502的胶水，或热熔胶、AB胶）

STEPS TO BUILD YOUR OWN PASTA BRIDGE! 步骤：

STEP 1: Research Bridge Truss designs. （研究桥梁桁架的设计）
（这个链接有一些介绍）Link to for Bridge Resources (WD-STEM Bridge Site)

STEP 2: Blueprint. Draw an exact drawing of the SIDE-VIEW of your truss.（按照1:1的尺寸画设计图）

<<Must “span” 40 cm. (The opening is 40 cm). （它的要求是跨度40cm以上，也就是说，你的桥应该设计得比40cm还要长）
*This is an adaptation of the Whipple Truss.（这是Whipple桁架的演化版，我增加了一些对角，并保持中线对称）
*I added extra diagonal supports to the center (around where the block will be.)
**In my next design, I’ll have the diagonals meet exactly in the center, rather than off-center.

STEP 3: Glue two strands of pasta together the length of the truss along the bottom.（黏合底部两条梁）

<<THE FIRST TWO STRANDS ARE HERE.
STEP 4: Glue the outside frame and verticals.（黏合外框）

STEP 5: GLUE the diagonals. **You can measure them before glueing, OR
as illustrated, glue then cut off the extra…carefully!（黏合对角线。可在黏合前测量，或如图所示，黏合后切断多余的，这时候要非常小心！）

STEP 6: Do it again! Make a second truss for the other side.（同样把对侧做好）

STEP 7: BLUEPRINT #2: The bottom frame (a.k.a. “the frame for the roadbed/deck)（设计并画出底部蓝图）

<<Notice the cross bars of the bottom frame line up with the vertical braces on the truss. （注意底部边框线与上桁架的垂直支架的位置关系）
STEP 8: GLUE the frame for the bottom.（黏合底部框架）

STEP 9: Glue the roadbed/deck onto the bottom frame.（黏合底部“桥面”）

<<Hole in the middle for the eye-hook!（中间的孔是为了放承重块的）
<<Full length spaghetti that crosses next to each other in the middle section (where the block will be!).（有些部分的意面是重叠粘贴的，这样可以延伸长度并且增加强度）
STEP 10: Glue bottom frame to one truss. (It’s easier to glue together with the truss on its side.) （将底部和两侧桁架黏合）

STEP 11: Glue the other truss on the other side of the bottom frame.
**Make sure the sides are straight up!（保证桁架垂直！）

STEP 12: Measure how wide the bottom of the bridge is. Break pieces this size to connect the trusses.
Then glue the trusses together with the pieces.（用合适长度的连接梁黏合两片衍架）

<<Top view. Glued across and diagonally.（俯视图，包括横向连接和斜向连接）
STEP 13: Add the block (5x5x2 cm) and eye-hook. Hang over 2 tables with a 35 cm span.（这是他的测试，只在35cm跨度下，别忘了我们的比赛要求是40cm）

STEP 14: TEST! Put a sheet or tarp under your bridge.
*Attach a large cup or bucket to the eye-hook.
*Slowly add measured weight until it breaks! (or almost breaks…)（逐渐加压直至桥梁垮塌或即将垮塌…）