| PaperNO | Paper / Abstract |
|
G2-012
15:20
|
15:35
|
TIME HISTORY RESPONSE ANALYSIS OF RC SCHOOL BUILDING USING SUPER-AND-SUB STRUCTURE MODEL
Many buildings were damaged in pile foundation in 2011 Tohoku-Chiho Taiheiyo-Oki Earthquake. In this study, a school building damaged in the pile foundation in 2011 Tohoku-Chiho Taiheiyo-Oki Earthquake was analyzed. The purpose of this study is to simulate the damage of pile foundation of the building. The time history response analysis using super-and-sub structure model was conducted. As a result, pile foundation was damaged in the analysis and it was corresponding with the actual damage. On the other hand, flexural failure of foundation beams occurred and shear failure of columns occurred in the analysis, it was different from the actual damage.
Tomofusa Akita, Eiichi Inai
2011 Tohoku-Chiho Taiheiyo-Oki Earthquake, pile foundation, reinforced concrete
|
|
G2-014
15:35
|
15:50
|
A STUDY ON THE RESPONSE OF CES STRUCTURE WITH DIFFERENT SHEAR STRENGTH OF BEAM-COLUMN JOINTS
CES (Concrete Encased Steel) structure is a new structure composed of steel and fiber reinforced concrete (FRC). Comparing the SRC structure and the CES structure, the CES structure can shorten the construction period, reduce the construction cost and facilitate the pre-casting. The Architectural Institute of Japan is trying to publish guidelines for structural performance evaluation to disseminate the CES structure. One of the problems is modeling of the beam-column joint. In the guideline, the beam-column joint is assumed to be rigid as a general rule, but the conditions that can be treated as rigid are unknown. In this study, the authors analyzed CES buildings with different shear strength of beam-column joints and clarified the relationship between the shear strength of beam-column joint and the seismic response.
kazuki takahashi
CES structure, different shear strength of beam-column joint, modal adaptive pushover analysis, panel zone model, rigid zone model, time history response analysis
|
|
G2-011
15:50
|
16:05
|
SEISMIC BEHAVIOR FOR STEEL-PLATE-EMBEDDED HIGH-STRENGTH REINFORCED CONCRETE COUPLING BEAMS OF SHEAR WALLS
This study explores the seismic behavior of embedded steel plate in the coupling beam through five sets of specimens. The experimental results show that for coupling beam with a vertical main reinforcement in straight-through configuration, when the lateral displacement increases, the concrete may be crushed due to the decrease of the shear capacity and shear damage occurs. The scheme of using lateral stirrups can effectively provide a composite mechanism between steel plates and concrete. With an embedded steel plate and a good composite of the steel plate and concrete, the shear capacity of the beam can be improved and the failure mode of the test specimens can be transformed into flexural failure. The design of the end bearing plate and the stiffening plate may cause the concrete around the end to be crushed. This shows that the anchoring mechanism of the steel plate can be further improved.
Min-Lang Lin
coupling beams, shear capacity, steel plate
|
|
G3-013
16:05
|
16:20
|
SHEAR BEHAVIOR OF ULTRA-HIGH PERFORMANCE FIBER REINFORCED CONCRETE BEAMS WITHOUT STIRRUP
Ultra-high performance fiber reinforced concrete (UHPFRC) has superior strength and ductility, which together turn into enhanced shear strength and crack-width control ability. This study investigated the shear resistance of ultra-high performance fiber reinforced concrete beams with different shear span-depth ratios. Four-point load tests were performed to study the shear behavior of UHPFRC beams. Multiple performance measures were employed to assess the behavior of the UHPFRC beams. The experimental results showed that fibers had a significant contribution to the shear strength of the beams. In addition, the ultimate shear strength of the beam was closely related to the fiber content and the shear span-depth ratio. Particularly, the shear strengths obtained by the tests were consistently higher than the ones calculated in according to ACI 318-14.
KUO WEI WEN, CHUNG CHAN HUNG, KUO CHIA WEI
aggregate interlock, Cracking control, shear behavior, shear strength, UHPFRC
|
|
G3-011
16:20
|
16:35
|
NUMERICAL STUDY ON THE CORRELATION BETWEEN FUNDAMENTAL FREQUENCIES AND LAYOUTS OF COLUMNS FOR SELECTED BUILDING MODELS
Despite that the natural frequency of a building type of structure is clearly affected by various factors including material types, structural layouts, story and building heights,and structural systems as well. It is generally adopted in most practical specifications to correlate the fundamental frequency of a building to its overall height. Such simplification provides useful estimates yet it is apparently ineffective when applying to indicate more precise referenced values for buildings with certain layouts, construction materials and structural characteristics. In this work, the authors investigated the potential factors which affect the natural frequencies of typical terraced house constructed around residential area in Taiwan. Numerical studies of selected building models are performed using ETABS in which both structural dimensions, proportioning and material properties are selected based on realistic data corresponding to typical residential houses. Numerical results shown in this paper are associated with the story height and the number of columns in the lateral directions.
LIU HUNG-YU, Luo Yi-Fan, Yu Chih-Peng
fundamental frequency, number of columns, RC building, Reinforced masonry building, story height
|
|
G2-015
16:35
|
16:50
|
A study on the influence of seismic zoning factors on the structure cost and the repair cost of the RC school building
In Japan, the seismic zoning factors (Z) is defined for each region as a numerical value of 1.0 to 0.7. Z represents the relative ratio of the expectation of the earthquake ground motion obtained by past earthquake records etc. In the region which Z is from 0.7 to 0.9, the member cross section is smaller and the structure cost is smaller than the region which Z equal to 1.0 in general. On the other hand, when a large earthquake occur in the region which Z is from 0.7 to 0.9, the structural damage may increase and the repair costs may increase. In this study, RC school building model was prepared under Z=1.0, 0.9, 0.8 respectively and the structure cost was calculated. In addition, time history response analysis was carried out and determined the level of disaster according to the obtained maximum story drift angle. After that, the repair cost was calculated. As a result, the lowest structure cost showed in the case of Z=0.8. The highest structure cost showed in the case of Z = 1.0. However, the repair cost tend to be higher in the case of Z=0.8 than in the case of Z=1.0.
Daisuke Matsubara
push over analysis, RC scool building, time history response analysis
|