THE RESEARCH FOR DAMAGE BEHAVIOR OF REINFORCED CONCRETE COLUMN UNDER BI-DERECTION LATERAL LOAD REVERSALS

双向横向荷载作用下钢筋混凝土柱损伤行为研究

• 批准号: 07458245
• 负责人: OGAWA Junji
• 金额: $ 0.96万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07458245/
• 关键词: REINFORCED CONCRETE COLUMN; PRECAST SHELL CONCRETE COLUMN; ONE DIRECTIONAL LOAD; CIRCLE LOADING PATH; LOAD AND DISPLACEMENT RELAXION; COMPRESSION STRIN DISTRIBUTION; HIGH STRENGTH CONCRETE; HIGH STRENGTH STEEL; プレキャスト外殻コンクリート柱; 荷重一変位特性曲線

Using cantilever type column specimen to model a central column of the first floor of RC frames for medium rise buildings, the seismic behavior of RC columns subjected to one direction and two direction input motions was investigated. 10 specimens of common type RC column and 14 specimens of precast-shell RC columns were used. The common type are those cast in-situ and are called RC-columns and the precast-shell are those which have a prefabricated external shell with only the core concrete cast in place. This last type are denominated PCa columns. In total 24 specimens were tested. Also, normal and high strength concrete was used. In the case of normal concrete the cross section of the specimens was 40cm*40cm with a shear span ratio of 2.5 and for high strength concrete the cross section was of 35cm*35cm with a shear span ratio of 3.0.For normal concrete columns, 12-D16 bars of SD35 steel were used as main reinforcement and the nominal strength of the concrete was 240kg/cm2. For high … More strength concrete column, 12-D19 bars of SD50 steel were used as main reinforcement with a nominal strength for concrete of 600kg/cm2. In the case of PCa specimes, the nominal strength of the concrete for the prefabricated shell was of 600kg/cm2 when concrete for core was of normal strength and 800kg/cm2 when concrete for core was high strength concrete. The parameters taken into account in this research were the loading path (one direction and two direction), transverse reinforcement ratio (pw=0.29,0.57,0.6,0.97,1.2%), transverse reinforcement arrangement (simple stirrup and double stirrup, spiral), axial force ratio (N/BDFc=0.25,0.4,0.5), and material strength.The strain distribution measured experimentally was compared with that obtained analytically using the fiber model analysis and shown good agreement. As conclusion, was observed that for small transverse reinforcement the maximum strength of the column or the maximum load is smaller when the specimen were subjected to two directional loal that when were subjected to one directional load. For large amount of transverse reinforcement that difference in the maximum load in not appreciable. However, in all cases, when the specimens were subjected to two directional loads the strain distribution shown a lager strain that when the specimens are under uniaxial loads. This shows that the two direction loading gives more serious damage than the one direction loading. Comparing the analytical results with experimental results it can be stated that the fiber model can be used to simulate the seismic behavior of the RC column. Less

采用悬臂式柱试件模拟中高层钢筋混凝土框架一层中心柱，研究了钢筋混凝土柱在单向和双向输入运动作用下的抗震性能。其中普通型钢筋混凝土柱10根，预制壳钢筋混凝土柱14根。常见的类型是那些现浇的，被称为RC柱，预制壳是那些有预制的外壳，只有核心混凝土现浇的那些。这最后一种类型是计价的PCA列。总共测试了24个样本。此外，还使用了普通混凝土和高强混凝土。普通混凝土的截面为40 cm×40 cm，剪跨比为2.5；高强混凝土的截面为35 cm×35 cm，剪跨比为3.0。对于普通混凝土柱，采用12-D16筋SD35钢筋作为主筋，混凝土名义强度为240 kg/cm2。适用于高…主筋采用强度较高的混凝土柱12-D19筋，混凝土标称强度为600 kg/cm2。在PCA试件的情况下，预制壳的标称强度在芯材混凝土为正常强度时为600 kg/cm2，当芯材混凝土为高强混凝土时为800 kg/cm2。研究中考虑了加载路径(单向和双向)、横向配筋率(PW=0.29、0.57、0.6、0.97、1.2%)、横向配筋(简单箍筋和双箍筋、螺旋)、轴力比(N/BDFC=0.25、0.4、0.5)和材料强度等参数，将试验测得的应变分布与纤维模型分析得到的应变分布进行了比较，结果表明两者吻合较好。结果表明，对于较小的横向配筋，试件在双向荷载作用下的最大强度或最大荷载要小于单向荷载作用下的最大荷载。对于大量的横向配筋，最大荷载的差异并不明显。然而，在所有情况下，当试件受到双向加载时，应变分布显示出比单轴加载时更大的应变。这表明双向加载比单向加载产生的损伤更严重。将分析结果与试验结果进行对比，可以看出纤维模型可以较好地模拟钢筋混凝土柱的抗震性能。较少

项目成果

J.Y.Park, J.Ogawa, J.Shibuya, M.Hoshi, Y.Abe: "Seismic properties of reinforced concrete columns under axial and flexure loading" Proceeding of the annual meeting, tohoku branch, AIJ. Vol58. 379-382 (1995)

J.Y.Park、J.Okawa、J.Shibuya、M.Hoshi、Y.Abe：“轴向和弯曲荷载下钢筋混凝土柱的抗震性能”年会论文集，东北分会，AIJ。

C.Cuadra, A.Shibata and J.Ogawa: "Stress-strain models for inelastic analysis for RC columns subjected to bi-directional lateral load reversals" Cairo first international conf.On concrete structures. 34-43 (1996)

C.Cuadra、A.Shibata 和 J.Okawa：“双向横向荷载反转作用下 RC 柱非弹性分析的应力应变模型”开罗首届混凝土结构国际会议。

C CUADRA: "Stress-Strain Models for Inelastic Analysis for RC Columns subjected to Bi-directional Lateral Load Reversals" Cairo First International Cont.on Concrete Structures. 3・34-43 (1996)

C CUADRA：“双向横向荷载反转下的 RC 柱非弹性分析的应力应变模型”开罗第一国际混凝土结构续刊 3・34-43 (1996)。

J.Y.Park, J.Ogawa, J.Shibuya, M.Hoshi, Y.Abe: "Seismic properties of reinforced concrete column under biaxial circle path loading" Journal of structural engineering. Vol.42B. 181-190 (1996)

J.Y.Park、J.Okawa、J.Shibuya、M.Hoshi、Y.Abe：“双轴圆路径荷载下钢筋混凝土柱的抗震性能”结构工程杂志。

朴 在泳: "軸力と曲げを受ける外殻プレキャスト鉄筋コンクリート柱の耐震性能" 日本建築学会東北支部研究報告集. 第58号. 379-382 (1995)

Jae-young Park：“预制钢筋混凝土外壳柱承受轴力和弯曲的抗震性能”日本建筑学会东北分会研究报告第58. 379-382号（1995）