[TowerTalk] PIPE ANCHORS

[Jim Lux]

On 10/31/11 9:13 PM, Kipton Moravec wrote:
> On Mon, 2011-10-31 at 19:34 -0700, Jim Lux wrote:
>> On 10/31/11 2:02 PM, Dorn Hetzel wrote:
>>> But of course, filling the pipe or square tube with concrete probably
>>> does help since bending would have to compress the concrete
>>> fill and concrete *seriously* resists compression.  Especially if the
>>> interior of the tube is rough enough for the concrete to bond
>>> to it well (or some bolts are run through or such).
>>>
>>
>>
>> I'm not sure about that.  I looked through a bunch of references, and
>> nobody seems to have measured the strength with/without concrete.


> http://www.ctsee.org.tw/pdf/200310/ee0401-05.pdf
>


Excellent.. A first glance is interesting.  They're talking structural 
columns, mostly, and I can see easily how filling the column greatly 
reduces local buckling.  I'll have to read some more about loading in 
bending (it's in there, but I haven't had my first cup of coffee yet..)