PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012
Nowadays, planning of the building are based on strong column weak beam concept where the input energy from earthquake dissipated through structural damage. Structural damage potentially will increase the risk of casualties. Along with technology development, seismic protection systems are invent...
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id-itb.:365292019-03-13T13:42:13ZPERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 Cipta Wiguna, Eka Pengadilan & peradilan Indonesia Final Project viscoelastic dampers, nonlinear time history analysis INSTITUT TEKNOLOGI BANDUNG https://digilib.itb.ac.id/gdl/view/36529 Nowadays, planning of the building are based on strong column weak beam concept where the input energy from earthquake dissipated through structural damage. Structural damage potentially will increase the risk of casualties. Along with technology development, seismic protection systems are invented. Application of seismic protection systems in the building will change energy dissipation mechanism and hopefully can reduce the damage cause by the earthquake. One of seismic protection systems are viscoelastic dampers. This damper is made of viscoelastic material which has the ability to dissipate energy through shear strain energy and damping energy. Application of viscoelastic dampers in structure is to be expected to reduce energy dissipation mechanism through structural damage. In addition, the use of viscoelastic dampers is expected to improve the performance of the structure. Performance of the structure that become concern in this study is the base shear, structure displacement, energy, and structure damage (hinges). Analysis methods that used in this study is nonlinear time history analysis using time history earthquake data from El-Centro NS component (1940) scaled to the Bandung area with medium soil based on SNI 1726-2002. El-Centro earthquake data which used in this study only the first 10 seconds because the highest intensity of the earthquake located at this range. Model of the structure which reviewed this study consists of a dual system models, dual system models with viscoelastic dampers, dual system models with column reinforcement ratio modification which using viscoelastic dampers, dual system models with column reinforcement ratio and dimension modification which using viscoelastic dampers. The main variables in this study is the viscoelastic damping (and stiffness) properties. Viscoelastic damping properties which used in this studies is 50 kN s/m, 5000 kN s/m, 7500 kN s/m, 15000 kN s/m, and 20000 kN s/m. v The result show us that the use of viscoelastic dampers cause an increase in the base shear but was able to reduce response, period, energy, and structural damage consistently for both of the models, models without modification and models with modification. Percentage of displacement reduction at the low level of structures is smaller compared to the reduction that occurred on the 9th floor and above. Effectiveness of viscoelastic dampers decreases with increasing of damping properties. Models with large damping properties have very low effectiveness. The result for models without modification, show the most optimum response and energy reduction produced by model with damping properties 5000 kN s/m, while the most optimum damage reduction produced by model with damping properties 15000 kN s/m. Models with column reinforcement ratio modifications show better result than model without modification, the most optimum damage reduction produced by model with damping properties 7500 kN s/m and 15000 kN s/m. Models with column dimension and reinforcement ratio modifications show best damage reduction result. The most optimum damage reduction produced by model with damping properties 20000 kN s/m where there are no badly damaged hinges (>CP) formed. text |
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Pengadilan & peradilan Cipta Wiguna, Eka PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 |
description |
Nowadays, planning of the building are based on strong column weak beam concept
where the input energy from earthquake dissipated through structural damage.
Structural damage potentially will increase the risk of casualties. Along with
technology development, seismic protection systems are invented. Application of
seismic protection systems in the building will change energy dissipation
mechanism and hopefully can reduce the damage cause by the earthquake.
One of seismic protection systems are viscoelastic dampers. This damper is made
of viscoelastic material which has the ability to dissipate energy through shear
strain energy and damping energy. Application of viscoelastic dampers in structure
is to be expected to reduce energy dissipation mechanism through structural
damage. In addition, the use of viscoelastic dampers is expected to improve the
performance of the structure. Performance of the structure that become concern in
this study is the base shear, structure displacement, energy, and structure damage
(hinges).
Analysis methods that used in this study is nonlinear time history analysis using
time history earthquake data from El-Centro NS component (1940) scaled to the
Bandung area with medium soil based on SNI 1726-2002. El-Centro earthquake
data which used in this study only the first 10 seconds because the highest intensity
of the earthquake located at this range.
Model of the structure which reviewed this study consists of a dual system models,
dual system models with viscoelastic dampers, dual system models with column
reinforcement ratio modification which using viscoelastic dampers, dual system
models with column reinforcement ratio and dimension modification which using
viscoelastic dampers. The main variables in this study is the viscoelastic damping
(and stiffness) properties. Viscoelastic damping properties which used in this
studies is 50 kN s/m, 5000 kN s/m, 7500 kN s/m, 15000 kN s/m, and 20000 kN
s/m.
v
The result show us that the use of viscoelastic dampers cause an increase in the base
shear but was able to reduce response, period, energy, and structural damage
consistently for both of the models, models without modification and models with
modification. Percentage of displacement reduction at the low level of structures is
smaller compared to the reduction that occurred on the 9th floor and above.
Effectiveness of viscoelastic dampers decreases with increasing of damping
properties. Models with large damping properties have very low effectiveness. The
result for models without modification, show the most optimum response and
energy reduction produced by model with damping properties 5000 kN s/m, while
the most optimum damage reduction produced by model with damping properties
15000 kN s/m.
Models with column reinforcement ratio modifications show better result than
model without modification, the most optimum damage reduction produced by
model with damping properties 7500 kN s/m and 15000 kN s/m. Models with
column dimension and reinforcement ratio modifications show best damage
reduction result. The most optimum damage reduction produced by model with
damping properties 20000 kN s/m where there are no badly damaged hinges (>CP)
formed. |
format |
Final Project |
author |
Cipta Wiguna, Eka |
author_facet |
Cipta Wiguna, Eka |
author_sort |
Cipta Wiguna, Eka |
title |
PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 |
title_short |
PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 |
title_full |
PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 |
title_fullStr |
PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 |
title_full_unstemmed |
PERFORMANCE STUDIES OF REINFORCED CONCRETE STRUCTURE WITH DUAL SYSTEM USING VISCOELASTICDAMPED BRACE DUE TO STRONG EARTHQUAKE BASE ON SNI 1726-2012 |
title_sort |
performance studies of reinforced concrete structure with dual system using viscoelasticdamped brace due to strong earthquake base on sni 1726-2012 |
url |
https://digilib.itb.ac.id/gdl/view/36529 |
_version_ |
1821997156622401536 |