w*******y
发帖数: 60932 | 1 14-Gauge Kett P-540 Pneumatic Double-Cut Shears $22.92 free shipping with
Prime (FSSS) from Amazon (Temporarily Back-ordered)
Temp. back-ordered
90 PSI pistol grip, variable speed, 2200 RPM motor
Replaceable 2 tool steel shear blades
Cuts C.R. mild steel 14 to 18 gauge, most grades of stainless to 16 gauge
Clean, burr free cut
Lightweight and easily maneuverable
14-Gauge Kett P-540 Pneumatic Double-Cut Shears:
http://www.amazon.com/gp/product/B003ZSHNAO/ref=ox_sc_act_title
$22.92
Google Prices:
... 阅读全帖 |
|
R**a
发帖数: 190 | 2 屋主把 patio enclosed了，这样，里面的 family room 光线就不好。
我喜欢亮堂堂的感觉，就只有花钱把patio拆开。后来一想，反正都是花钱，
不如在 family room 的一面墙上开个窗户。
agent提醒我，要开窗户，一定得找有执照的contractor，拿permit，
遇到这面墙是shear wall的话，还不好办。
啥叫shear wall? 承重墙？ |
|
z*********n
发帖数: 94654 | 3 前几天早鸟给科普过，shear wall只允许开一个非常小的口子，忘记多大了
反正我当时算着那要是个窗户就是个小得不能再小的窗户了
随便破坏shear wall对你自己也不安全 |
|
r*****j
发帖数: 7481 | 4 木结构房子的shear wall，计算用的力是load from diaphragm， 还是 seismic load？
手上的IBC2012里面没有了 2306.4 shear walls的部分，这个部分不知道被放到哪里去了 |
|
w********h
发帖数: 12367 | 5 ft...
shear就是在一个方向上施加力。
以前我做液晶高分子的时候，
聚合液取出来后用四氟乙烯辊在一个方向上推，
造成取向。
现在用流变仪也可以使得block-copolymer and self-organized structural systems
在一个方向上取向。
比如Science1997年有一期材料科学的专刊Caltech的Kornfield的一篇文章比较详细地介
绍
了这个方法。
Stephen Cheng组里也用shear的方法得到很好的结果，
见Phys Rev Lett, 2001
condition |
|
n******m
发帖数: 34 | 6 RANDOM VIBRATION OF SHEAR DEFORMABLE FGM PLATES |
|
n******n
发帖数: 1030 | 7 It looks like a torsion shear failure. |
|
l*******G
发帖数: 1191 | 8 the up right corner/tip off the middle pier was damaged and eroded with a
45deg angle！sign of shear damage there. And also wonder why not seeing much
steel fiber there. If steel fibers were only placed close to the center in
the middle pier, that is wrong! |
|
M***y
发帖数: 33 | 9 对学流体力学的人应该很简单吧，还请告诉我怎么做
(虽然目前不知道)假设fluid viscosity, porous media的porosity, pore size etc.
都已知
porous media = cylinder tube
想计算下在porous media上的drag force or fluid shear stress
thanks a lot |
|
s****u
发帖数: 19 | 10 I think what they mean might be using extruder to produce high shear condition
so that the long polymer chain be alignment. |
|
|
w*******y
发帖数: 60932 | 12 Sears
Craftsman 21 in. Hedge Shears
$14.99 - $7.50 Instant Savings
= $7.49 with free store pickup
Back again for those who missed it here
|
|
w*******y
发帖数: 60932 | 13 Sears has Craftsman hedge shears for 50% off and available for in-store
pickup. Next lowest price is $14.99. It's one of the daily deals, so it will
last until midnight. Of the 21 reviews, 18 of them give it 4-5 stars.
Link:
http://www.sears.com/shc/s/p_10153_12605_07183553000P
Lifetime warranty. 8" steel cutting blades.
$8.07 total for me and still in stock at all the local Sears locations.
This was a FP deal back in June 2010.
|
|
|
发帖数: 1 | 15 【 以下文字转载自 ME 讨论区 】
发信人: beats (beats), 信区: ME
标 题: Harvard professor John W. Hutchinson is accused of plagiarism
发信站: BBS 未名空间站 (Mon Sep 12 16:12:16 2016, 美东)
from: Liang Xue
to: John Hutchinson
cc: Tomasz Wierzbicki
date: Mon, Aug 11, 2014 at 12:12 PM
subject: Re: No winners--follow-up
Dear John,
Thank you for your email. I had a difficult time to understand the
message you want sent. My guess is that the central message you would like
to emphasize is that you can develop the sa... 阅读全帖 |
|
发帖数: 1 | 16 from: Liang Xue
to: John Hutchinson
cc: Tomasz Wierzbicki
date: Mon, Aug 11, 2014 at 12:12 PM
subject: Re: No winners--follow-up
Dear John,
Thank you for your email. I had a difficult time to understand the
message you want sent. My guess is that the central message you would like
to emphasize is that you can develop the same model once you understood that
ductile fracture is indeed J3 dependent. Possibly. I
believe many people have the necessary knowledge to do so on their
own. H... 阅读全帖 |
|
r*********5
发帖数: 61 | 17 这是我的简历，有些关键信息隐藏了，但都是真实的，如果这里有认识我的人请保密呵
呵！也请回帖不要引用，我很害羞的说，觉得版里回复的前辈都好nice才鼓起勇气将我
的信息展示出来，谢谢大家！
r*********[email protected]
Profile
Extensive project management experience, including developing project
schedules, reviewing design plan and construction drawings, assessing
construction costs, organizing engineering bidding, monitoring engineering
progress, and coordinating the relationships of developers, designers and
builders.
Working knowledge in structural design of buildings, including type
selection... 阅读全帖 |
|
e********a
发帖数: 262 | 18 The Introduction of Shear Modification to Gurson Model
Sun, 2012-09-23 23:41 - Liang Xue
research
The Introduction of Shear Modification to Gurson Model
I have been asked questions about how the shear modification was introduced
to the Gurson model. I was also asked to compare my modification (see Xue L.
, Constitutive modeling of void shearing effect in ductile fracture of
porous materials, Engineering Fracture Mechanics, 2008, 75(11):3343-3366) to
John Hutchinson's modification (Nahshon, K., H... 阅读全帖 |
|
Z****g
发帖数: 13731 | 19
a
According to definition of ASCE(P110) diaphram is horizontal menbrane like
roof or slab. Sometimes peope call shear wall a vertical diaphram prbably
because their similarity in properties: both menbrane, both carry shear
force; the only difference is, slab etc is horizontal diaphram and shear
wall is vertical diaphram.
In many buildings, a bearing wall(carrying gravity load from the floors or
roof) is also used as shear wall to resist lateral load. Yes, it is shear
wall that has two jobs: ver... 阅读全帖 |
|
Z****g
发帖数: 13731 | 20
a
According to definition of ASCE(P110) diaphram is horizontal menbrane like
roof or slab. Sometimes peope call shear wall a vertical diaphram prbably
because their similarity in properties: both menbrane, both carry shear
force; the only difference is, slab etc is horizontal diaphram and shear
wall is vertical diaphram.
In many buildings, a bearing wall(carrying gravity load from the floors or
roof) is also used as shear wall to resist lateral load. Yes, it is shear
wall that has two jobs: ver... 阅读全帖 |
|
k****n
发帖数: 3803 | 21 ☆─────────────────────────────────────☆
GEO (CEO) 于 (Wed Aug 22 20:47:38 2007) 提到:
为个两层的公共建筑提供基础设计参数，暂时没有确定是桩基还是浅基础。
粘土层的三轴试验是应该做固结不排水（CU）还是不固结不排水（UU）。
☆─────────────────────────────────────☆
trackbed (涮羊肉) 于 (Thu Aug 23 00:52:57 2007) 提到:
CU
☆─────────────────────────────────────☆
GEO (CEO) 于 (Thu Aug 23 10:18:11 2007) 提到:
can I ask why? any details?
☆─────────────────────────────────────☆
trackbed (涮羊肉) 于 (Thu Aug 23 14:16:05 2007) 提到:
not sure what is your concern. but for... 阅读全帖 |
|
g********2
发帖数: 6571 | 22 Donald Trump’s New York Times Interview: Full Transcript
By THE NEW YORK TIMESNOV. 23, 2016
President-elect Donald J. Trump during a meeting at The New York Times’s
offices in Manhattan on Tuesday.
Following is a transcript of President-elect Donald J. Trump’s interview on
Tuesday with reporters, editors and opinion columnists from The New York
Times. The transcription was prepared by Liam Stack, Jonah Engel Bromwich,
Karen Workman and Tim Herrera of The Times.
ARTHUR SULZBERGER Jr., publisher o... 阅读全帖 |
|
g*****9
发帖数: 4125 | 23 My understanding is they are the same thing. I call them pruning shears.
They are strong enough to prune hard branches of trees and shrubs, sometimes
up to two centimetres thick.
There are three blade designs of pruning shears: anvil, bypass and parrot-
beak. Anvil pruners have only one blade which closes onto a flat surface.
They tend to crush the stem, but remain reliable when slightly blunt. Anvil
shears are useful for cutting thick branches. Bypass shears usually work
exactly like a pair of ... 阅读全帖 |
|
d********y
发帖数: 1141 | 24 here are the pictures of the definition.
Pic 1: "shear wall designed to resist lateral forces parellel to the plane
of the wall, primarily in shear. a shear wall is sometimes referred to as a
vertical diaphram,"
shear wall should resist lateral force, horizontal force. So this plane of
the wall is like the roof of the wall, not the side wall of the building.
why a shear wall is referred to as a vertical diaphram?
Pic 2: Why the shear wall resist lateral loads and also carry vertical
gravity load... 阅读全帖 |
|
d********y
发帖数: 1141 | 25 here are the pictures of the definition.
Pic 1: "shear wall designed to resist lateral forces parellel to the plane
of the wall, primarily in shear. a shear wall is sometimes referred to as a
vertical diaphram,"
shear wall should resist lateral force, horizontal force. So this plane of
the wall is like the roof of the wall, not the side wall of the building.
why a shear wall is referred to as a vertical diaphram?
Pic 2: Why the shear wall resist lateral loads and also carry vertical
gravity load... 阅读全帖 |
|
c*******n
发帖数: 1648 | 26 【 以下文字转载自 Physics 讨论区 】
发信人: blm (BN之白龙马), 信区: Physics
标 题: 水立方的奥秘不是浮力大，而是阻力小 (转载)
发信站: BBS 未名空间站 (Thu Aug 14 16:11:25 2008), 站内
发信人: simpleton (傻逸), 信区: Olympics
标 题: Re: 水深越深，依照物理學原理浮力也就越大
发信站: BBS 未名空间站 (Thu Aug 14 15:54:35 2008)
对于牛顿流体，shear stress = viscosity * shear rate
shear rate = velocity / thickness of fluid
水越深(thickness of fluid)，在速度(velocity)不变的情况下剪切速率(shear rate)
越小，而粘度(viscosity)恒定，剪切力(shear stress)自然就会减小。水受到的剪切
力减小，人受到的反作用力自然也小。
原来2米的泳池现在变成3米，剪切力为原来的2/3。对于平衡态的平板剪切，理论上是
这样。 |
|
a*******l
发帖数: 2353 | 27 Beam to column connection
Shear only connection
Double angle on beam web.
Bolted on both beam web and column flange.
设计bolts只考虑剪力,因为梁翼板没有和柱焊接不能形成有效的力矩.
但是,通常我们说shear only,简支梁端的连接,基本上free of rotation.
考虑极端情况,角钢长度和梁深一样,根据设计可以只用两个bolt,上下各一个关于中性
轴对称, 如何free rotation? 如果不能自由转动,岂不是可以承担弯矩,可以承担多少
? 最大为梁腹板屈服?
LRFD设计验算Shear, Bearing, Block shear (shear rupture)中,哪一项包含了上述内
容?
我是不是想得太奇怪了. |
|
j***h
发帖数: 4412 | 28 这个是In-plane bending crack of shear wall due to seismic forces. 这个 1978 年建的
房子显然不符合1995年后发布的新抗震规范(i.e., UBC 97 & CBC 2007)的要求。
这是加州所有house with room over garage的通病：不符合CBC 2007 2305.3.4, for
shear wall aspect ratio greater than 2:1, but less than 3.5:1, the allowable
shear values should be reduced by 2w/h.
这个1978 年建的房子显然没有按CBC 2007 2305.3.4的要求，reduce allowable shear
values by 2w/h. 因此在minor earthquake (50% exceeedance within 50 years event, 50/50 event)下，发生了In-plane bending crack of shear wall due |
|
b*m
发帖数: 124 | 29 【 以下文字转载自 Olympics 讨论区 】
发信人: simpleton (傻逸), 信区: Olympics
标 题: Re: 水深越深，依照物理學原理浮力也就越大
发信站: BBS 未名空间站 (Thu Aug 14 15:54:35 2008)
对于牛顿流体，shear stress = viscosity * shear rate
shear rate = velocity / thickness of fluid
水越深(thickness of fluid)，在速度(velocity)不变的情况下剪切速率(shear rate)
越小，而粘度(viscosity)恒定，剪切力(shear stress)自然就会减小。水受到的剪切
力减小，人受到的反作用力自然也小。
原来2米的泳池现在变成3米，剪切力为原来的2/3。对于平衡态的平板剪切，理论上是
这样。 |
|
v**e
发帖数: 8422 | 30 40架生产中的波音787机翼出现裂纹
Wing cracks found on 787s in assembly
By: STEPHEN TRIMBLEWASHINGTON DCSource: Flightglobal.com11 hours ago
Roughly 40 Boeing 787s still in production may have cracks within shear ties
of a wing rib, the company says.
Boeing is inspecting aircraft that may have the condition on three assembly
lines in Everett, Washington, and North Charleston, South Carolina.
“We are addressing affected airplanes as required,” Boeing says in a
statement.
The issue is not expected to impact a pl... 阅读全帖 |
|
M***O
发帖数: 3718 | 31 http://thediplomat.com/2015/06/who-is-the-biggest-aggressor-in-
Who Is the Biggest Aggressor in the South China Sea?
In the past 20 years, Vietnam has doubled its holdings in the South China
Sea.
GA
By Greg Austin
June 18, 2015
In 1996, Vietnam occupied 24 features in the Spratly Islands (source).
At that time, according to the same source, China occupied nine. By 2015,
according to the United States government, Vietnam occupied 48 features, and
China occupied eight.
On May 13, U.S. Assistant Se... 阅读全帖 |
|
l****z
发帖数: 29846 | 32 January 17, 2012 | Posted by David Robertson
Fact checkers at the New York Times need to get busy, because the NYT blog
“The Caucus” has make a whopper of a false claim about GOP presidential
contender Mitt Romney.
Here is what NYT blogger Michael D. Shear wrote:
In New Hampshire, Mr. Romney provided openings by saying he could relate
to people who receive pink slips, and later letting the words “I like to
fire people” come out of his mouth. Both were quickly seized on by his
rivals.
Romney ... 阅读全帖 |
|
|
f*****E
发帖数: 165 | 34 Generally speaking, the seismic force of 2 stories house will be 2 times of
single story if the total weight is assumed double. The demanding shear
capacity on shear walls of 2 stories house will be double.
The first floor will only takes 33% of the entire seismic load.The 2nd
floor will take 67% of the total seismic load acting at the roof diaphragm
level if 2nd story height is equivalent to 1st story height.
The demanding overturning moment of the 2 stories house will be triple(
actually it w... 阅读全帖 |
|
x******n
发帖数: 8550 | 35 F-L
Foamflower (Tiarella cordifolia) Tiarella enjoys the cool days of fall and
may remain evergreen throughout the winter. (USDA Zones 3 - 8)
Foxglove, Perennial (Digitalis purpurea) Since perennial Foxgloves are
usually pruned back after flowering and produce a rosette of basal growth,
nothing more is needed until a light cleaning in spring. (USDA Zones 3 - 8)
Fringed Leaf Bleeding Heart (Dicentra formosa / eximia) Although the crowns
like to be high enough in the soil to be protected from damp... 阅读全帖 |
|
n**********b
发帖数: 114 | 36 When you design shear wall buildings, the column and beams (except link
beams between shear walls) should be considered only under gravity load. So
if you design columns and beams under the lateral load, you will get a wrong
reinforcement plan. Or if you shear walls is very small relative to the
columns, you may consider the building as a combined frame and shear wall
building, which is called bearing walls building in ACI318-08 (I may be not
correct about this since my ACI is in the office.) |
|
d********y
发帖数: 1141 | 37 我好像明白一点。通过挤压变形，垂直的shear wall 把水平力传给水平方向的roof 或
者slab.
但是第一张照片里Shear wall 定义，和你说的，slab是horizontal diaphram，shear
wall是vertical ，我还是觉得应该是反过来的。
我第四章看完了，疑惑还是没有解开。
能不能再帮忙解释下？谢谢。
＂the only difference is, slab etc is horizontal diaphram and shear
wall is vertical diaphram.＂
★ 发自iPhone App: ChineseWeb - 中文网站浏览器 |
|
d********y
发帖数: 1141 | 38 我好像明白一点。通过挤压变形，垂直的shear wall 把水平力传给水平方向的roof 或
者slab.
但是第一张照片里Shear wall 定义，和你说的，slab是horizontal diaphram，shear
wall是vertical ，我还是觉得应该是反过来的。
我第四章看完了，疑惑还是没有解开。
能不能再帮忙解释下？谢谢。
＂the only difference is, slab etc is horizontal diaphram and shear
wall is vertical diaphram.＂
★ 发自iPhone App: ChineseWeb - 中文网站浏览器 |
|
p*********e
发帖数: 32207 | 39 ☆─────────────────────────────────────☆
yeemartin (猪头) 于 (Mon Aug 17 05:10:38 2009, 美东) 提到:
看了一篇的文章
有解释为啥Shell Rotella T、Mobil Delvac这些heavy duty diesel oil的Used oil
analysis结果都很突出的原因，普通engine oil是S certification，例如SJ、SM。商
用truck engine oil是C certification， 目前是CI、CJ。C的additive package比S的
牛x很多，但有可能会不兼容乘用车上的catalytic converter。
我的G35目前就在用Shell Rotella T，摩托车下次换油也准备用这个。mobil的
synthetic motorcycle oil 1 quart 12刀，受不了。
Commercial (Diesel) Oil
The additive packages for C (commercial) certification... 阅读全帖 |
|
w*******y
发帖数: 60932 | 40 Outset Carving Set:
http://www.cooking.com/products/shprodde.asp?SKU=221625
So I bought 3 of these which arrived today. They were awesome. Much better
than I expected for $10 shipped (for each). So I decided to buy 3 more to
give to family.Completely stainless-steel this two piece carving set (knife
and fork) is lightweight, butheavy duty and durable. It has a good weight
but not too heavy. The stainless steel handles are easy to grip.
There is an additional discount of 20% (on all clearance ... 阅读全帖 |
|
|
f******n
发帖数: 137 | 42 The abstract is listed. Let me know if you are interested.
A new model of polymers in flow in semi-dilute solution is presented. The
chains are modeled as simple Hookean dumbbells exposed to compressive
hydrodynamic forces. Equating the hydrodynamic and elastic forces predicts
chain compression with shear rate. The model predicts both the power law
behaviour observed for polymer shear thinning and the measured decrease in
radius with shear rate with reasonable accuracy. |
|
j***h
发帖数: 4412 | 43 鬼谷50年新100年新的single family houses的同学，尤其是house with room over
garage的owners，可以重点检测一下garage外墙是否开裂，而且外墙的end stubs是否
弯曲，如这个南加的同学遇到的情形一样：
http://www.mitbbs.com/article_t/Living/31493175.html
其原因是这个 1978 年建的房子显然不符合1995年后发布的新抗震规范(i.e., UBC 97
& CBC 2007)的要求。
这是加州所有house with room over garage的通病：不符合CBC 2007 2305.3.4, for
shear wall aspect ratio greater than 2:1, but less than 3.5:1, the allowable
shear values should be reduced by 2w/h.
这个1978 年建的房子显然没有按CBC 2007 2305.3.4的要求，reduce allowable shear
values b |
|
j***h
发帖数: 4412 | 44 For the general cases, the answer should be "YES". But some funny engineers
did design room over garage without adding steel strong wall or steel
moment frame, or dragging the shear force from the plywood shear wall above
the garage to other shear wall in the same line at Ground Level. |
|
f**********l
发帖数: 1191 | 45 加建完了再申请permit是很麻烦的事，包括补交建筑图纸、结构图纸，各种各样的检查
（地基、梁、外墙、insulation、水、电、下水、屋顶），有很多检查必须扒开了看。
我估计没有$10k下不来。手头刚好有一个检查的list，你可以看看做参考：
Foundation inspection:
B01 Bld set backs/location
B02 Forms & Steel
B03 Footings
B04 Hold down placement
B05 Foundation Combo B01 - B04
Structural inspections
B06 Under floor framing / shear
B07 Floor Joist
B08 Under Floor insulation
B09 Roof Tear Off (reroof)
B10 Roof Deck nailing
B11 Exterior Shear Nailing
B12 Interior / Exterior Lath
B13 Rough Frame inspection
B14 Interi... 阅读全帖 |
|
|
b*****e
发帖数: 14299 | 47 ☆─────────────────────────────────────☆
x100 (芙妹粉丝) 于 (Wed Jul 4 00:39:41 2012, 美东) 提到:
今天邮箱里收到他家一份coupon，东西都巨便宜，网上一看review巨烂，是不是他家卖
的都是垃圾？有没有什么不是垃圾的可以买的？
☆─────────────────────────────────────☆
tyning (Mens et Manus) 于 (Wed Jul 4 00:42:09 2012, 美东) 提到:
手动工具什么的还行。
大部分电动的不要碰。
☆─────────────────────────────────────☆
kitkat (标头党) 于 (Wed Jul 4 00:46:08 2012, 美东) 提到:
迄今为止买了上当的垃圾就半套TAP AND DIE. DIE 完全LJ.
IT 凡用电池的POWER TOOL 基本全LJ 别碰. 大多手动工具都挺好, 而且LIFETIME WARR
, 啥时坏了拿去就换新小二一句话都不问, CR... 阅读全帖 |
|
a*****y
发帖数: 33185 | 48 从西方心灵哲学看佛教唯识论
作者：冀剑制 来源：拙风文化网
在西方心灵哲学陷入瓶颈的今天，西方学者渴望从东方传统思想寻找一些突破的灵
感，尤其佛教唯识论对心灵有着深刻的讨论而成为注目的焦点。但是，由于思考脉络上
的不同，唯识论目前仍旧很难在西方心灵哲学架构下定位，因此仍无法真正成为西方心
灵哲学中的一个新希望。本论文企图透过将唯识论与西方心灵哲学中的主要理论与概念
的比较将唯识论定位在当今西方心灵哲学的脉络中。
1. 西方心灵哲学的概念框架
西方心灵哲学的发展可以算是由笛卡儿的实体二元论(substance dualism)所构成
的概念框架(conceptual framework)下来讨论的，笛卡儿主张，心与物是两种不同的实
体，其理论中所谓的“心”指的是一个思维的主体，从我们日常生活中可以体验到的各
种情感、思考、甚至意识都是属于“心”这样的东西。而所谓的“物”自然就是我们日
常生活中所接触的到这个外在世界的一切可占有空间的事物。从这样的一个概念框架来
看，有人主张心物实际上属于同一个实体，那个看起来不占有空间的心事实上是由占有
空间的大脑所产生的东西，那么，心物是同样的东西，... 阅读全帖 |
|
发帖数: 1 | 49 哪位大侠能否帮我看看这个DNA shear/sonicating之后的跑胶图。用的ladder是100bp
的ladder.我有两个问题：
1. 前三个的bandsize是不是太小了？我用的protocol上说sonicate后至少要750-250bp.
2. 后三个究竟是under-shearing还是over-shearing?
我从来没做过CHIP,所处的实验室也不是做这个的。
P.S.前三个和后三个是不同的细胞系。 |
|
n**********b
发帖数: 114 | 50 关键是费用问题，核电站的建筑标准非常高了，但是老百姓住不起，开发商也得赔死。
其实你去一个20层（或者更高）左右的高楼，如果是shear wall building,基本也就是
电梯周围是shear wall,你说的每个家庭都搞个小的shear wall不现实.费用极高。
其实，我觉得目前passive control得方法来抗震还是可以的，不过费用也是太高。但
是像地震等级高的建筑（学校，医院，公共设施），可以考虑国家补助一部分。
以后，我给自己盖一木头别墅，呵呵，水泥比木头贵在美国。 我准备在基础下放置一
些圆木来抗震，据说希腊人早就用这种方法了，好像是上千年以前。现在叫Base
Isolation. |
|
