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Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

  • 1.  Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-26-2018 06:23 PM
    Edited by Tirza Austin 10-26-2018 06:23 PM
      |   view attached

    Dear colleagues,

    Let us combine experience with knowledge and help each other with the seismic improvement of existing buildings.


    With a slogan

    Everyone has an idea

    Everyone is an experience

    Everyone is a teacher

    Everyone is a project

    Share our views




    1


    ------------------------------
    [Reza] [Mokarramaydenlou] Ph.D., P.E., C.Eng, S.E., M.ASCE
    [Structural Engineering and Seismic rehabilitation Consultant ]
    [Mokarramandpartners LLC]

    ------------------------------


  • 2.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-27-2018 01:40 PM
    Edited by Tirza Austin 10-27-2018 01:40 PM
      |   view attached
    Dear Reza, thank you for the initiative. In my home country, Colombia, we have a Manual to retrofit earth buildings (enclosed). It is written in Spanish but is very illustrative and it can be useful for further research.
    Regards,

    ------------------------------
    Andres Guzman Ing., M.ASCE
    PROFESSOR
    UNIVERSIDAD DEL NORTE
    Barranquilla
    573004284680
    ------------------------------

    Attachment(s)

    pdf
    Manual Rehabilitacion Adobe y Tapia AIS.pdf   5.45 MB 1 version
    Original Message


  • 3.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-30-2018 04:37 PM
    Edited by Tirza Austin 10-31-2018 11:20 AM
    Dear Professor Andres Fernando Guzman, 

    Thank you very much for participating in this discussion.
    You have provided an excellent file for the repair of unarmed building structures.
    I ask other friends to download and read your file.


    ------------------------------
    Reza Mokarramaydenlou Ph.D., P.E., C.Eng, S.E., M.ASCE
    Structural Engineering and Seismic rehabilitation Consultant
    Mokarramandpartners LLC

    ------------------------------

    Original Message


  • 4.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-27-2018 01:40 PM
    Edited by Tirza Austin 10-27-2018 01:39 PM
    Great idea, and thank you for posting the photos of your project.

    ------------------------------
    Stacey Morris P.E., M.ASCE
    ETI Corporation
    West Memphis AR
    (901) 758-0400
    ------------------------------

    Original Message


  • 5.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-27-2018 01:41 PM
    Edited by Tirza Austin 10-27-2018 01:41 PM
    Impressive stuff. It would be even more impressive to see a few more pictures showing. How are the brick walls attached to the foundation.

    ------------------------------
    Sayed Maqsood S.M.ASCE

    Oakland CA
    (510)395-4361
    ------------------------------

    Original Message


  • 6.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-27-2018 09:34 PM
    Edited by Tirza Austin 10-27-2018 09:34 PM
    Dear Sayed Ahmad Maqsood

    I will send you an example of the details of the seismic rehabilitation connected the Brick wall detail to the foundation.


    Dear colleague, Thank you very much for participating in this discussion.


    ------------------------------
    Reza Mokarramaydenlou Ph.D., P.E., C.Eng, S.E., M.ASCE
    Structural Engineering and Seismic rehabilitation Consultant
    Mokarramandpartners LLC

    ------------------------------

    Original Message


  • 7.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-28-2018 10:26 AM
    Edited by Tirza Austin 10-28-2018 10:26 AM
    Thank you Reza Mokarram Aydenloo for sharing structural details. I would agree with colleagues to follow a structural code procedure for retrofitting any type of existed  buildings. However, someone wouldn't suggest any kind of retrofitting without a good understanding of how to retrofit. It can also be included that stabilizing a structure varies from being retrofitted. There are structural element in a building that can be retrofitted accordingly. The pictures are not clear, diaphragm might not be required at ground level. The structure might overwhelmed of tension due using unessential steel. 

    ------------------------------
    Sayed Maqsood S.M.ASCE
    Oakland CA
    (510)395-4361
    ------------------------------

    Original Message


  • 8.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-30-2018 01:56 PM
    Edited by Tirza Austin 10-30-2018 01:55 PM
    Thanks for posting this.

    Can you expand a little about why you chose this method of <g class="gr_ gr_205 gr-alert gr_spell gr_inline_cards gr_disable_anim_appear ContextualSpelling ins-del multiReplace" id="205" data-gr-id="205">retrofiting</g>, any other alternatives you considered, and situations you would recommend that others consider using this method as opposed to alternates?


    ------------------------------
    Stephanie Slocum P.E., M.ASCE
    Founder
    Engineers Rising LLC
    www.engineersrising.com
    ------------------------------

    Original Message


  • 9.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-30-2018 03:39 PM
    Edited by Tirza Austin 10-30-2018 03:38 PM
    Dear Stephanie, 

    First of all, thank you for participating in this discussion and studying my file.

    In seismic rehabilitation projects, there are four main factors for design and development:

    1. Local knowledge of the region. 
    2. Materials in the region. 
    3. The cost of seismic reconstruction based on performance.
    4. Time to implement seismic reconstruction plan.

    In this case study, is the answer to the above questions?

    1- The technical knowledge of the area was generally medium to high. Using modern computing technology to run samples such as ّFRP and Base Isolation was somewhat difficult.
    2-The materials in the area are generally cement and rebar.
    3-The cost of seismic reconstruction should not exceed 20% of the cost of rebuilding, according to the employer's request and the use of the building.
    4-According to the user, this project should be a seismic reconstruction within 3 months.

    It should be noted:
    Other proposed designs for the seismic reconstruction of this building are:
    1- Using a concrete shear wall and rigging the roof aperture
    2- Use of FRP Fibers
    3- Embed base isolation under foundation 

    Follow the topics presented in lessons Seismic Rehabilitation. 

    In the future, I'm going to offer some computational examples.

    ------------------------------
    Reza Mokarramaydenlou Ph.D., P.E., C.Eng, S.E., M.ASCE
    Structural Engineering and Seismic rehabilitation Consultant
    Mokarramandpartners LLC

    ------------------------------

    Original Message


  • 10.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 10-31-2018 04:41 PM
    Edited by Reza Mokarram Aydenloo 10-31-2018 04:47 PM

    Seismic rehabilitation process diagram for a project

    In a seismic rehabilitation project, the most important principle is familiarity with the project control process.

    The operational process of a seismic rehabilitation project has been shown in detail in this diagram.

    If this is your field, what would you do to complete this diagram?


    Step 1: Reports a qualitative assessment of seismic rehabilitation (identified detectable damage to the eyes).
    Step 2: Determine target Building Performance Levels.
    Step 3: Detect elements and conduct experiments.
    Step 4: Reports a quantitative assessment of seismic rehabilitation and computer modeling with software. 
    step 4-1: Building structure provide Determine Target Building Performance Levels ,in this case process finish.
    step 4-2: Building structure can't provide Determine Target Building Performance Levels , you have 2 options , continue process or change step 2
    Step 5: Report that provided 3 methods as a concept of seismic rehabilitation. 
    Step 6: Report that explain the best concept of seismic rehabilitation with full details plan.
    Step 7: Accept seismic rehabilitation concept with employer according to cost and time,in this case process finish.
    Step 8: Reject seismic rehabilitation concept with employer according to cost and time , you can review step 5. 



    ------------------------------
    [Reza] [Mokarramaydenlou] Ph.D., P.E., C.Eng, S.E., M.ASCE
    [Structural Engineering and Seismic rehabilitation Consultant ]
    [Mokarramandpartners LLC]
    ------------------------------

    Original Message


  • 11.  RE: Lessons of Seismic Rehabilitation steps: A typical school building with brick walls and a flexible diaphragm

    Posted 11-01-2018 06:45 PM
    Edited by Reza Mokarram Aydenloo 11-01-2018 06:55 PM

    How do seismic rehabilitation Ceilings for diaphragmatic function?

    seismic rehabilitation of ceiling with steel section and masonry infill

    An example of a healthy ceiling
    An example of a roof breakdown after an earthquake that was not coherent

    THE DIAPHRAGM IN THIS TYPE OF CEILING HAS A NON-RIGID PERFORMANCE.
    INTERNAL DEFORMATION UNDER EARTHQUAKE LOAD IS MORE THAN 2.
    Therefore, one of the most suitable ways in seismic rehabilitation of this kind of buildings with this type of roof is to create coherence in the displacement of the ceiling beams.

    The proposed method is a two-step process of creating coherence in the movement:
    1- coherence beam's of ceiling in Z local axis 2- coherence beam's of ceiling in XY plan ViewBy creating the coherence of these types of ceilings, the regular deformation will be integrated.

        


    ------------------------------
    [Reza] [Mokarramaydenlou] Ph.D., P.E., C.Eng, S.E., M.ASCE
    [Structural Engineering and Seismic rehabilitation Consultant ]
    [Mokarramandpartners LLC]


    Original Message


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