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SP-237: Finite Element Analysis of Reinforced Concrete Structures最新文献

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Consideration of Scale Effect in Reinforced Concrete Members Subjected to Shear Loading 钢筋混凝土构件受剪切荷载时尺度效应的考虑
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18237
M. Terai, K. Minami
{"title":"Consideration of Scale Effect in Reinforced Concrete Members Subjected to Shear Loading","authors":"M. Terai, K. Minami","doi":"10.14359/18237","DOIUrl":"https://doi.org/10.14359/18237","url":null,"abstract":"This paper describes how, in most structural members, strength tends to decrease as the member size increases and this phenomenon is known as the scale effect. Many experiments investigating the impact of scale effects on reinforced concrete (RC) structures have already been conducted. However, since few laboratories have the capacity to test large-scale specimens, few experimental investigations have tested near full-scale RC members. This paper investigates the scale effect in RC members that are subjected to shear loading. Two different sized test specimens were prepared and tested. The results clearly indicate that the member strength decreases as its size increases. The Japanese building code, an empirically-based code with no scale effect parameter in the shear formulas, generates overly-conservative predictions for full-scale members. Using plane concrete monotonic compression strength data, a formula defining the shear strength of reinforced concrete members is proposed. Experimental results show that the proposed formula for computing ultimate strength agrees better with the experimental data than existing formulas.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"442 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134570374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shear Softening Characteristics of Reinforced Concrete Deep Beams 钢筋混凝土深梁的剪切软化特性
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18255
Y. Kaneko, H. Mihashi
{"title":"Shear Softening Characteristics of Reinforced Concrete Deep Beams","authors":"Y. Kaneko, H. Mihashi","doi":"10.14359/18255","DOIUrl":"https://doi.org/10.14359/18255","url":null,"abstract":"This paper studies the shear softening characteristics of reinforced concrete deep beams. A mechanical model for the macroscopic shear failure is developed in the paper and it focuses on the entire load-displacement relationship. The method makes use of the rotating smeared crack model and the truss model, combined into a single simple model. The analysis described in the paper includes the development of multiple diagonal cracks and macroscopic shear crack propagation. The model is found to provide good agreement with the experiments. The analytical results point out that the shear softening characteristics depends on the size of specimens, the shear-span ratio, the shear reinforcement and the confinement.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133736709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
FE Analysis of Steel Fiber Reinforced Concrete Beams Failing in Shear: Variable Engagement Model 钢纤维混凝土梁受剪破坏有限元分析:变接合模型
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18246
S. Foster, Y. Voo, K. T. Chong
{"title":"FE Analysis of Steel Fiber Reinforced Concrete Beams Failing in Shear: Variable Engagement Model","authors":"S. Foster, Y. Voo, K. T. Chong","doi":"10.14359/18246","DOIUrl":"https://doi.org/10.14359/18246","url":null,"abstract":"This paper describes how a finite element model (FEM) is developed for the analysis of fiber reinforced concrete plane stress members that failed by the mode I fracture. The constitutive law is built on the variable engagement model where the behavior of a fiber composite is obtained by integration of its parts (fibers and concrete matrix) over the cracked surface. In developing the model in this way the formulation is made generally applicable to any type of steel fiber-cement based matrix and to fiber cocktails with any combination of fibers in the mix in any ratios. The model is demonstrated for a reactive powder concrete girder failing in shear using local and non-local modeling. The paper describes how the finite element formulation is shown to be capable of modeling the girder, with good accuracy observed for the global load versus displacement history and is shown to correctly capture the localized shear failure mechanism.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122075948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Experimental Study of Recovered Properties of Retrofit (Repaired) Concrete Members 加固(修补)混凝土构件恢复性能试验研究
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18240
K. Suzuki, A. Fujii
{"title":"Experimental Study of Recovered Properties of Retrofit (Repaired) Concrete Members","authors":"K. Suzuki, A. Fujii","doi":"10.14359/18240","DOIUrl":"https://doi.org/10.14359/18240","url":null,"abstract":"This paper describes how two interior column (RC)-beam (PPC) specimens were tested. These specimens were first subjected to reversed, repeated cyclic loading to maximum rotational angles of 1/30 and 1/16. The specimens were then repaired using resin injection and mortar covering. Mechanical properties obtained following repair were almost the same as those obtained during the initial loading, probably, due to the confined concrete used in the beam ends. However, a reduction in initial stiffness of approximately 30% was observed.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114286743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Beam Finite Element for Shear-Critical RC Beams 临界剪力RC梁的梁有限元
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18260
F. Filippou, A. Saritas
{"title":"A Beam Finite Element for Shear-Critical RC Beams","authors":"F. Filippou, A. Saritas","doi":"10.14359/18260","DOIUrl":"https://doi.org/10.14359/18260","url":null,"abstract":"The proposed beam finite element is capable of describing the response of reinforced concrete members under the interaction of axial force, shear, and bending moment. The element is based on a mixed formulation and does not exhibit the shear locking problems of displacement-based elements. The material model of the Modified Compression Field Theory by Vecchio and Collins (1986) was used to describe the biaxial response of the concrete at monitoring points across several monitoring sections along the element axis. With this model the proposed beam element is able to capture well the overall monotonic response of shear critical beams, while equally satisfactory agreement is obtained with local response measures, such as crack orientations. In spite of this promising agreement with experimental results the numerical performance of the material model was rather slow for the lack of a consistent tangent stiffness matrix. This fact coupled with the material model's inability to represent cyclic loading point out the need for a numerically consistent, robust and efficient constitutive model.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"435 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134318015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Post-peak Behavior of Shear Failing Beams Governed by Snapback Instability 受回跳失稳控制的剪切破坏梁峰后行为
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18254
T. Tanabe, A. Itoh, N. Ueda
{"title":"Post-peak Behavior of Shear Failing Beams Governed by Snapback Instability","authors":"T. Tanabe, A. Itoh, N. Ueda","doi":"10.14359/18254","DOIUrl":"https://doi.org/10.14359/18254","url":null,"abstract":"This paper describes how snapback load-deflection relations of shear failing beams are numerically obtained using Arc Length Method with Selected Displacement Control Points. Identifying stress loading area while load decreases, failure process of snapback shear failure of a beam is clarified in the paper. The fundamental understanding of the phenomena is extended to failure concept of a structure through energy balance calculation.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133594213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Three-Dimensional Lattice Model Analysis of RC Columns Subjected to Seismic Loads 地震荷载作用下钢筋混凝土柱的三维格点阵模型分析
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18257
T. Miki, J. Niwa
{"title":"Three-Dimensional Lattice Model Analysis of RC Columns Subjected to Seismic Loads","authors":"T. Miki, J. Niwa","doi":"10.14359/18257","DOIUrl":"https://doi.org/10.14359/18257","url":null,"abstract":"This paper presents analytical studies for the biaxial behavior of reinforced concrete (RC) columns with square cross section subjected to earthquake ground motion. This paper studies the estimates of the effect of biaxial bending on RC columns. This study extends an existing 2D lattice model to three dimensions. The 3D lattice model can offer reasonable prediction of the shear-carrying capacity of RC members. By comparing analytical results with the experimental results of shaking table tests on two RC columns, it has been confirmed that the 3D lattice-model analysis can reasonably predict the biaxial behavior of RC columns subjected to the bilateral ground motion. In addition, it is found that analysis considering the buckling of reinforcement can accurately predict the seismic response and energy dissipation capacity of RC columns.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115399627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Damage Assessment of Reinforced Concrete Columns Under High Axial Loading 钢筋混凝土柱在高轴向荷载作用下的损伤评估
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 2006-08-01 DOI: 10.14359/18252
S. Kono, H. Bechtoula, M. Sakashita, Hitoshi Tanaka, F. Watanabe, M. Eberhard
{"title":"Damage Assessment of Reinforced Concrete Columns Under High Axial Loading","authors":"S. Kono, H. Bechtoula, M. Sakashita, Hitoshi Tanaka, F. Watanabe, M. Eberhard","doi":"10.14359/18252","DOIUrl":"https://doi.org/10.14359/18252","url":null,"abstract":"This paper describes how damage assessment has become more important than ever since structural designers have started to employ performance based design methods that require structural and member behaviors at different limit states be predicted precisely. This paper aims at clarifying the confining effect of concrete of a plastic hinge zone of a reinforced concrete column confined by shear reinforcement, so that a designer can accurately predict damage when columns experience seismic loadings that include large axial force and bilateral deformations. In an experimental program, eight half-scale columns and eight full-scale columns were tested under the reversal bilateral displacement with constant or varying axial load in order to study the effects of loading history and intensity on the confining effect. Since shear failure was inhibited by providing enough transverse reinforcement, as defined by the previous Japanese design guidelines, damage gradually progressed in a flexural mode with concrete crushing and yielding of reinforcing bars. The damage level depended on the bilateral loading paths and the axial load history. In an analytical program, a section analysis using a fiber model was employed and the effect of confinement on the behavior of core concrete was studied. The analysis predicted the observed deterioration of moment capacity and longitudinal shortening under different loading conditions and for different specimen sizes. The paper is considered to increase the accuracy with which damage in reinforced concrete columns subjected to severe loading is assessed.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128452403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Saw-Tooth Softening Model for Concrete Structures 混凝土结构锯齿形软化模型
SP-237: Finite Element Analysis of Reinforced Concrete Structures Pub Date : 1900-01-01 DOI: 10.14359/18259
J. Rots, S. Invernizzi, B. Belletti
{"title":"Saw-Tooth Softening Model for Concrete Structures","authors":"J. Rots, S. Invernizzi, B. Belletti","doi":"10.14359/18259","DOIUrl":"https://doi.org/10.14359/18259","url":null,"abstract":"This paper describes, over the past years techniques for non-linear analysis have been enhanced significantly via improved solution procedures, extended finite element techniques and increased robustness of constitutive models. Nevertheless, problems remain in the real world with structures of softening materials like concrete. The softening gives negative stiffness and there is a risk of bifurcations because of multiple cracks that are competing to survive. Incremental-iterative techniques have difficulties in selecting and handling the local peaks and snap-backs. In this contribution, an alternative method is proposed. The softening diagram of negative slope is replaced by a saw-tooth diagram of positive slopes. The incremental-iterative Newton method is replaced by a series of linear analyses using a special scaling technique with subsequent stiffness/strength reduction per critical element. It is shown that this event-by-event strategy is robust and reliable. First, the example of a large-scale dog-bone specimen in direct tension is analyzed using an isotropic version of the saw-tooth model. The model is capable of automatically providing the snap-back response. Next, the saw-tooth model is extended to include anisotropy for fixed crack directions to accommodate both tensile cracking and compression strut action for reinforced concrete. Three different reinforced concrete structures are analyzed, a tension-pull specimen, a slender beam and a slab. In all cases, the model naturally provides the local peaks and snap-backs associated with the subsequent development of primary cracks starting from the rebar. The secant saw-tooth stiffness is always positive and the analysis always ‘converges’. Bifurcations are prevented due to the scaling technique.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125484578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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