1997 Fiscal Year Annual Research Report

RC柱の耐震性能に関する配筋詳細と補強工法の評価システム

Research Project

Project/Area Number	08555109
Research Institution	The University of Tokyo
Principal Investigator	前川宏一東京大学, 工学系研究科, 教授 (80157122)
Co-Investigator(Kenkyū-buntansha)	CHAUBE Rajes 東京大学, 工学系研究科, 講師
Keywords	耐震性能 / 配筋詳細 / 構成則 / 靭性 / せん断 / 寸法効果 / ゾーニング
Research Abstract	(1)RC柱の3次元解析と多方向入力応答 3次元的に配置された鉄筋からゾーニングを行い,多方向せん断を受ける短柱のせん断耐力と変形性能を解析と実験で比較を行い,精度の検証を行った。また、,寸法の異なる曲げせん断を受ける鉄筋コンクリートはりを用い,鉄筋降伏以前のせん断強度に寸法効果が見られることを解析からも確認した。また、鉄筋降伏以後にせん断破壊が生じる場合についても検証を行い,側方鉄筋のない部材については,靭性を適切に評価できることを示した。なお,内部に中間鉄筋を配した部材については,耐力は若干,実際よりも高めに評価することが分かり,さらに3次元ゾーニングの精度を高める必要があることも分かった。鉄板で横拘束されている柱では,鉄板拘束のないものに比較してじん性が向上することが,解析的にも認められ,補強補修工法の性能判定に使用できる見込みを得た。今後は鉄板とコンクリート間の境界特性を詳細に詰める必要がある。 (2)RC骨組み立体構造の耐震性能照査法の提案鉄筋コンクリート立体骨組み構造に対しては,3次元動的非線形解析を実行し,各々の部材に発生する2方向せん断力を算定して,(1)による方法で安全性を検討するシステムを提案した。また,このシステムの適用性を確認するために,阪神淡路大震災で被災した約60の鉄道高架橋の被害事例を使用した。その結果,妥当な精度で実構造の耐震性能-崩壊に対する安全性と地震荷重以後の残存機能性-を判定できることが確認された。

Research Products
(16 results)

All Other

All Publications (16 results)

[Publications] An,X., Maekawa,K. and Okamura.H.: "Numerical simulation of size effect in shear strength of RC beams" 土木学会論文集. 564/V-35. 297-316 (1997)
[Publications] An,X. and Maekawa,K.: "Failure analvsis of underground RC frame subjected to seismic actions" 土木学会論文集. 571/V-36. 251-267 (1997)
[Publications] An,X. and Maekawa,K.: "Shear resistance and ductility of RC columns after yield of main reinforcement" 土木学会論文集. 585/V-38. 233-247 (1998)
[Publications] Shawkv.A. and Maekawa,K.: "Nonlinear response of underground RC structures under shear" Concrete Library of JSCE. No.29. 203-216 (1997)
[Publications] Maekawa,K. and Qureshi,J.: "Computational model for reinforcing bar embedded in concrete under combined axial pullout and transverse displacement" Concrete Library of JSCE. No.29. 217-232 (1997)
[Publications] Irawan,P. and Maekawa,K.: "Path-dependent nonlinear analysis of RC shells subjected to combined in-plane membrane and out-of-plane flexural actions" Concrete Library of JSCE. No.30. 221-238 (1997)
[Publications] Maekawa,K. and Qureshi,J.: "Stress transfer across interfaces in reinforced concrete due to aggrega interlock and dowel action" Concrete Library of JSCE. No.30. 239-254 (1997)
[Publications] Maekawa,K., Irawan,P. and Okamura,H.: "Path-dependent three-dimensional constitutive laws of reinforced concrete-formulation and experimental verification-" Strauctural Engineering and Mechanics. Vol.5,No.6. 743-754 (1997)
[Publications] An,X., Shawky,A. and Maekawa,K.: "The collapse mechanism of a subway station during the Great Hanshin Earthquake" Cement and Concrete Composite. Vol.19.241-257 (1997)
[Publications] 岡村甫, 前川宏一, 金益賢: "コンクリート構造物の耐震診断と耐震性能評価法" 西日本工業大学30周年記念シンポジウム論文集. 29-36 (1997)
[Publications] Fukuura,N. and Maekawa,K.: "Multi-directional crack model for in-plane reinforced concrete under reversed cyclic actions-4way fixed crack formulation and verification" Int.conf.EURO-C. (appearing). (1998)
[Publications] Kim,I., Okamura,H. and Maekawa,K.: "Method for checking seismic performance of concerete structures and its effectiveness" Journal of Structural Engineering. Vol.44A (appearing). (1998)
[Publications] Okamura,H., Maekawa,K. and Kim,I.: "Next-generation design method of concrete structures" Int.Conf.CONSEC-98. (appearing). (1998)
[Publications] Salem,H., Hauke,B. and Maekawa,K.: "Concrete cover effect on tension stiffness of cracked reinforced concrete" Proc.of JCI. (appearing). (1998)
[Publications] Hauke,B. and Maekawa,K.: "Three dimensional modelling of reinforced concrete members" Proc.of JCI. (appearing). (1998)
[Publications] Salem,H. and Maekawa,K.: "Coupled bond and bridging stress transfer in cracked reinforced concrete" Int.Conf.FRAMCOS,Gifu,. (appearing). (1998)

1997 Fiscal Year Annual Research Report

RC柱の耐震性能に関する配筋詳細と補強工法の評価システム

Principal Investigator

前川 宏一 東京大学, 工学系研究科, 教授 (80157122)

Research Products

[Publications] An,X., Maekawa,K. and Okamura.H.: "Numerical simulation of size effect in shear strength of RC beams" 土木学会論文集. 564/V-35. 297-316 (1997)

[Publications] An,X. and Maekawa,K.: "Failure analvsis of underground RC frame subjected to seismic actions" 土木学会論文集. 571/V-36. 251-267 (1997)

[Publications] An,X. and Maekawa,K.: "Shear resistance and ductility of RC columns after yield of main reinforcement" 土木学会論文集. 585/V-38. 233-247 (1998)

[Publications] Shawkv.A. and Maekawa,K.: "Nonlinear response of underground RC structures under shear" Concrete Library of JSCE. No.29. 203-216 (1997)

[Publications] Maekawa,K. and Qureshi,J.: "Computational model for reinforcing bar embedded in concrete under combined axial pullout and transverse displacement" Concrete Library of JSCE. No.29. 217-232 (1997)

[Publications] Irawan,P. and Maekawa,K.: "Path-dependent nonlinear analysis of RC shells subjected to combined in-plane membrane and out-of-plane flexural actions" Concrete Library of JSCE. No.30. 221-238 (1997)

[Publications] Maekawa,K. and Qureshi,J.: "Stress transfer across interfaces in reinforced concrete due to aggrega interlock and dowel action" Concrete Library of JSCE. No.30. 239-254 (1997)

[Publications] Maekawa,K., Irawan,P. and Okamura,H.: "Path-dependent three-dimensional constitutive laws of reinforced concrete-formulation and experimental verification-" Strauctural Engineering and Mechanics. Vol.5,No.6. 743-754 (1997)

[Publications] An,X., Shawky,A. and Maekawa,K.: "The collapse mechanism of a subway station during the Great Hanshin Earthquake" Cement and Concrete Composite. Vol.19.241-257 (1997)

[Publications] 岡村甫, 前川宏一, 金益賢: "コンクリート構造物の耐震診断と耐震性能評価法" 西日本工業大学30周年記念シンポジウム論文集. 29-36 (1997)

[Publications] Fukuura,N. and Maekawa,K.: "Multi-directional crack model for in-plane reinforced concrete under reversed cyclic actions-4way fixed crack formulation and verification" Int.conf.EURO-C. (appearing). (1998)

[Publications] Kim,I., Okamura,H. and Maekawa,K.: "Method for checking seismic performance of concerete structures and its effectiveness" Journal of Structural Engineering. Vol.44A (appearing). (1998)

[Publications] Okamura,H., Maekawa,K. and Kim,I.: "Next-generation design method of concrete structures" Int.Conf.CONSEC-98. (appearing). (1998)

[Publications] Salem,H., Hauke,B. and Maekawa,K.: "Concrete cover effect on tension stiffness of cracked reinforced concrete" Proc.of JCI. (appearing). (1998)

[Publications] Hauke,B. and Maekawa,K.: "Three dimensional modelling of reinforced concrete members" Proc.of JCI. (appearing). (1998)

[Publications] Salem,H. and Maekawa,K.: "Coupled bond and bridging stress transfer in cracked reinforced concrete" Int.Conf.FRAMCOS,Gifu,. (appearing). (1998)

前川宏一東京大学, 工学系研究科, 教授 (80157122)