Search found 91 matches

by borjiajia
Tue Sep 27, 2011 6:02 am
Forum: OpenSees.exe Users
Topic: I need help desperately
Replies: 1
Views: 560

I need help desperately

I model a simply supported reinforced beam, using nonlinearbeamcolumn, fiber section, concrete02,steel02, 3 nodes named 1,3,5. applying vertical concentrating force to node 3. I want it to be displacement control. But after many times of testing, the result is always null. Please help me with my ana...
by borjiajia
Fri Sep 09, 2011 5:50 pm
Forum: OpenSees.exe Users
Topic: about the use of hysteretic material~~~
Replies: 3
Views: 1616

Re: about the use of hysteretic material~~~

1,You mean a model with fiber section is not suitable with hysteretic material?
2,Then If I want to simulate the pinching effect with hyseretic material, what section should be used instead of fiber section?
by borjiajia
Fri Sep 09, 2011 5:50 am
Forum: OpenSees.exe Users
Topic: about the use of hysteretic material~~~
Replies: 3
Views: 1616

about the use of hysteretic material~~~

Now I want to simulate a simply supported beam with reversed load. I have uesd steel02 and concrete02, but the result don't have pinching effect as the experiment. So I want to use the hysteretic material instead of steel02, do you think it makes sense? If yes, the problem is that I cannot find how ...
by borjiajia
Mon Aug 15, 2011 5:17 am
Forum: OpenSees.exe Users
Topic: about the section Aggregator.
Replies: 1
Views: 678

about the section Aggregator.

I have built a simply supported beam under cyclic loads. I considered shear effect into the section. But the results were messy. Is there anything wrong with my codes? :?: Here is the part of my codes: #-------------------------------------------------------------------------------------------------...
by borjiajia
Sat Aug 13, 2011 12:22 am
Forum: OpenSees.exe Users
Topic: troubles with steel01
Replies: 5
Views: 2557

Re: troubles with steel01

vesna wrote: > In general your model is good and the response you are getting makes sense. The only > thing I would not agree with is that the shear stiffness is EI. It is rather proportional > to AG. > > For your definition of moment-curvature and shear force-deformation relationships > there will ...
by borjiajia
Wed Aug 10, 2011 6:24 pm
Forum: OpenSees.exe Users
Topic: I want to simulate one beam with plane stress element.
Replies: 2
Views: 726

Re: I want to simulate one beam with plane stress element.

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by borjiajia
Tue Aug 09, 2011 4:50 am
Forum: OpenSees.exe Users
Topic: I want to simulate one beam with plane stress element.
Replies: 2
Views: 726

I want to simulate one beam with plane stress element.

I have finished simulating one simply supported reinforced concrete beam with fiber section and forced-nonlinear beamcolumn element. And I found the result not very satisfying. I considered it to be the effect from the shearing crack. Therefore, I want to simulate the RC beam with a plane stress ele...
by borjiajia
Fri Jul 22, 2011 5:40 am
Forum: OpenSees.exe Users
Topic: static cycle analysis of simply supported beam.
Replies: 1
Views: 776

static cycle analysis of simply supported beam.

Hi, I want to simulate simply supported beam applying static reversed cycle analysis. Then the codes are as follows: #--the model--------------------------------------------------------------------------- set L [expr 0.74*$m]; # beam length set X1 0.; set X3 [expr $X1 + $L]; set X5 [expr $X3 + $L]; ...
by borjiajia
Tue Jul 19, 2011 6:02 am
Forum: OpenSees.exe Users
Topic: I used the concreteZ01, and its performance is good.
Replies: 1
Views: 920

I used the concreteZ01, and its performance is good.

Thank you for your previous answers. And now I have new problems. I used the ConcreteZ01 and SteelZ01 which are written by UT, and the results turn out to be satisfying. But there still two problems confused with me. 1, after running the programs, part of it shows as follows, I never run into this, ...
by borjiajia
Thu Jul 14, 2011 12:30 pm
Forum: OpenSees.exe Users
Topic: the connection of two continuous elements
Replies: 14
Views: 3752

Re: the connection of two continuous elements

ok, I have sent my codes as a email to you. Thank you for checking up for me.
by borjiajia
Thu Jul 14, 2011 5:17 am
Forum: OpenSees.exe Users
Topic: the connection of two continuous elements
Replies: 14
Views: 3752

Re: the connection of two continuous elements

I am very confused with my code. I have examined my model like node, section, element, load, all those seem ok, What could the reason be? I have read the code in the example.chm about the canti2d column. I thought since it is suiItable for canti column,in theory, it must be ok with simply supported ...
by borjiajia
Wed Jul 13, 2011 3:37 pm
Forum: OpenSees.exe Users
Topic: the connection of two continuous elements
Replies: 14
Views: 3752

Re: the connection of two continuous elements

=================== Thank you very much for coming back... In my opinion, Since the middle node did not break the bar into two parts, Since the gravity I applied is distributed, then the deformation should be a curve not a "V", isn't it? I have had the line you referred...It didnot help. There are s...
by borjiajia
Wed Jul 13, 2011 12:05 pm
Forum: OpenSees.exe Users
Topic: the connection of two continuous elements
Replies: 14
Views: 3752

Re: the connection of two continuous elements

You must go to lunch...ok, I will go back to my sleep ...
by borjiajia
Wed Jul 13, 2011 11:38 am
Forum: OpenSees.exe Users
Topic: the connection of two continuous elements
Replies: 14
Views: 3752

Re: the connection of two continuous elements

Yes ,It has display command and by which ,I know it is V shape after applied gravity. _________________ It means the element does not move at all !
by borjiajia
Tue Jul 12, 2011 6:52 pm
Forum: OpenSees.exe Users
Topic: the connection of two continuous elements
Replies: 14
Views: 3752

Re: the connection of two continuous elements

========================================================================================== OK, if the bar is not broken by node, what other may the reason be for the large deformation ? I do think the result makes no sense. the gravity I applied is distributed along the whole beam element, but the d...