| Author | Naeem, Majid |
| Call Number | AIT Thesis no.ST-15-07 |
| Subject(s) | Reinforced masonry
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
Degree of Master of Engineering in Structural Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Structural performance of load bearing nominally reinforced masonry wall, made of
interlocking compressed earth blocks (ICEB), subjected to in-plane cyclic load in
conjunction with gravity loading was investigated by conducting full scale physical model
test in the lab. Lab test results of physical model were validated by simplified numerical
modeling. Suitability of a structure comprised of ICEB walls as load resisting component
was also checked for various seismically active regions.
A comprehensive assessment of structural behavior of the ICEB wall was accomplished by
conducting physical model test both at material and element level. Testing at material level
helped to establish the local behavior of ICEB blocks and assemblies. Local behavior
included cracking and crushing of blocks, yielding of rebar, closing and opening of head or
bead joints. Compressive strength and flexural strength tests were carried out on a single
block. Compressive strength of the grout was also determined by testing. Shear strength of
the joint increased with the increment in the pre-compression. Normal stresses (Ϭx and Ϭy)
were determined by compressive strength test parallel and perpendicular to bed joint on
prisms. Material and block level testing provides valuable parameters for micro modeling of
masonry wall.
Element level testing of full wall panel facilitated to assess the global behavior of the ICEB
wall. Wall panel size was 3.0m x 2.7m x 0.15m with height to width aspect ratio of 0.90.
Shear and flexural capacity of the wall predicted by ACI 530-8 was compared with actual
capacity of panel. Compression produced by bending moment causes the failure of the wall
panel. Cracking pattern noticed during the test reasonably strengthened the flexural failure
argument. Shear, rocking and flexural deformations were measured by sensors.
Deformations at yielding and crushing were calculated and an overall ductility factor was
determined to be 2.34.
Recommendations for the application of structure in seismically active region are also
included in this dissertation. |
| Year | 2015 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Anwar, Naveed; |
| Examination Committee(s) | Pennung Warnitchai;Punchet Thammarak; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2015 |