| Summary: | 碩士 === 國立成功大學 === 建築(工程)學系 === 86 === When RC building is subjected to horizontal earthquake
loading, if a column doesn''t have enough strength of moment-
resistance , the plastic hinge will occur on its both ends
.Besides , it will elongate the vibration period and even make
the structure unstable as the amount of plastic hinge is too
large. In order to improve this problem,a column with diaphram
on both sides can be used. In this thesis, the behavior of RC
columns with diaphram under eccentric axial compression were
investigated.Totally 13 columns with both-side-diaphram were
tested. During test the loading is monotonic,and the complete P-
Δand M-ψrelationship from elastic to ultimate are recorded.
Using the test results, the influence of parameters such as
eccentricity of load , length of diaphram 、hoop style and
reinforcement ratio of diaphram have been disscussed. The
difference among experment, analysis and JIA design The test
results of the 13 specimens reveal that :1. The less eccentric
distance is, the higher ultimate strength it needs. Longer
length of diaphram will increase the ultimate strength and
reduce the corresponding lateral displacement at the mid-point
of the column .Higher reinforcement ratio also increases the
ultimate strength ,and delay the ultimate deformation.In this
study ,the influence of hoop style of diaphram isn''t obvious in
ultimate strength but in lateral displacement.2. The P-Δand M-
ψanalysis curve obtained by three-dimensional finite difference
model has good argument with that of experiment.3. The
calaulation of JIA formula is much lower than the results of
experiment.4. The difference between calculation and experiment
will reduce if the reinforcement amount and arrangement in the
diaphram is considered.
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