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

{"title":"Nonlinear Torsion and Warping for Multifibre Beam Elements","authors":"F. Rafueneau, G. Casaux, J. Mazars","doi":"10.14359/18248","DOIUrl":"https://doi.org/10.14359/18248","url":null,"abstract":"The objective of this paper is to develop a simplified numerical tool dedicated to seismic analysis of reinforced concrete structure. Beam formulation and constitutive relationships are described in order to simulate the behavior of shear walls under complex loadings. This paper focuses on the torsion effects and the way for accounting for cross section warping for simplified analysis.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"33 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":"123556601","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}

{"title":"Discrete Analyses of Shear Failure in Reinforced Concrete","authors":"S. Saito, T. Higai","doi":"10.14359/18256","DOIUrl":"https://doi.org/10.14359/18256","url":null,"abstract":"This paper presents the numerical analyses of reinforced concrete (RC) members using discrete approaches, called spring network models. RC members under certain conditions exhibit brittle failure with strain localization under shear failure. In order to distinguish this failure mode from ordinary shear failure, which is less brittle and results in a more distributed strain field, this failure mode is called a sliding shear failure. The mechanisms of sliding shear failure are not well defined. Since the spring network model is one of the discrete-type approaches that are well suited to problems where material discontinuities are dominant, the results of numerical analysis are used to improve understanding of sliding shear failure. The model is validated through comparison of simulated and observed response for RC beams that exhibit ordinary shear failure and RC panels subjected to pure shear forces that exhibit sliding shear failure. A parameter study is then performed using the proposed model.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"32 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":"123737823","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}

{"title":"Evaluation of Cyclic Deterioration and Post-Peak Behavior of RC Beam-Column Joint Assemblages by 3-D FE Analysis","authors":"N. Shirai","doi":"10.14359/18250","DOIUrl":"https://doi.org/10.14359/18250","url":null,"abstract":"Nonlinear finite element analyses on the RC beam -column joint specimens failing in shear tested under cyclic lateral loading were conducted to investigate their fracture modes and post peak behaviors such as cyclic deterioration and shear resistance mechanism. The analyses were performed especially by paying attention to spatial discretization, modeling of bond behavior and type of loading. Furthermore, a macro -scale model for predicting the joint capacity proposed by Shiohara is reviewed and validity of his hypotheses are rigorously investigated through comparison of the observed and calculated results. Beam-column joint assemblage in the RC moment -resisting framed structures is a critical seismic element because its behavior under severe earthquake motions has a significant effect on failure mechanism and strength and deformation capacity of the building structures. Thus, many experimental studies have been conducted to understand failure and resistant mechanisms of the beam-column joints so far. The current seismic codes provides the upper limit of input shear to the joint to avoid the joint failure; that is, degradation of the story shear and localization of the shear deformation to the joint (ACI 1995, AIJ 1994 and SANZ 1995). Allowable limit of the input shear is expressed by a simple empirical formula in terms of the compressive strength of concrete. Kitayama et al. conducted the cyclic lateral loading test on the interior beam-column joint specimens with different bond properties of longitudinal steel bars in the beam through the joint. In addition, the earthquake response analyses with the simplified framed model were carried out using two kind of hysteresis models; one is a regular Takeda model and the other is a modified Takeda model characterized by a significant effect of the bond slip on a shape of the hysteresis (Kitayama et al. 1987). Consequently, they derived several recommendations on the limitation by the so-called bond index indicating bond deterioration of rebars, the limitation of the ratio of rebar diameter in the beam to width of the column expressed in terms of the yielding strength of rebar and the compressive strength of concrete, the limitation of the input shear for","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"1 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":"130878074","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}

{"title":"On the Post-Peak Ductility of Shear-Critical Beams","authors":"F. Vecchio","doi":"10.14359/18249","DOIUrl":"https://doi.org/10.14359/18249","url":null,"abstract":"This paper describes how code procedures for the seismic design of reinforced concrete structures are increasingly incorporating performance-based criteria. The push-over analyses is being incorporated into these criteria and becoming an accepted means of demonstrating sufficient energy-absorbing capacity. Therefore, in concrete frame structures containing shear-critical structural elements, the post-peak load-deformation response of these members becomes of practical importance. A series of shear-critical beams was tested recently, patterned after the classic set of beams tested by Bresler and Scordelis forty years ago. In the current tests, particular attention was paid to capturing the post-peak response. The details and results of these beams are presented, providing data useful in testing and calibrating analytical procedures. Nonlinear finite element analyses were undertaken to determine current ability to accurately model post-peak ductility in shear-critical members. Results indicate that current procedures are of marginally acceptable accuracy, and that further developmental work is warranted. A case study, involving a large concrete frame structure built in a high seismic region and containing shear-deficient members, is discussed. This case underscores the importance of accurately calculating the post-peak ductility of shear-critical beams.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"27 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":"131709988","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}

{"title":"Failure Analysis of RC Structures Using Irregular Lattice Models","authors":"J. Bolander","doi":"10.14359/18258","DOIUrl":"https://doi.org/10.14359/18258","url":null,"abstract":"This paper develops Irregular lattice models as an alternative means for failure analyses of reinforced concrete (RC) structures. The paper describes fundamental aspects of the model and comments on its use in promoting the iterative design of RC structures. Simulation results are provided for RC structures under quasi-static, monotonic loading. In particular, results are given for the incremental lateral load analysis of a 1/3 scale model of a lightly reinforced shear wall structure. Preliminary work on extending the model to accommodate dynamic loading is described.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"227 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":"114414606","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}

{"title":"Fatigue Failure Criterion for Deformed Bars Subjected to Large Deformation Reversals","authors":"T. Higai, Hikaru Nakamura, S. Saito","doi":"10.14359/18244","DOIUrl":"https://doi.org/10.14359/18244","url":null,"abstract":"This paper describes how, after the Hanshin-Awaji earthquake, the volume of lateral reinforcement used in reinforced concrete structures in Japan was increased in order to improve seismic performance. Although a large volume of closely spaced lateral reinforcement will be effective in preventing elastic buckling of the longitudinal reinforcement, it does not prevent plastic buckling. Under severe earthquake loading, longitudinal reinforcement will be subjected to large reversed-cyclic deformation demands into the plastic regime in tension and the buckling regime in compression. The paper presents the results of low cycle fatigue testing of deformed bars and examination of failure criteria for these bars.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"7 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":"125530001","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}

{"title":"Cyclic Softened Membrane Model for Nonlinear Finite Element Analysis of Concrete Structures","authors":"T. Hsu, M. Mansour, Y. Mo, J. Zhong","doi":"10.14359/18247","DOIUrl":"https://doi.org/10.14359/18247","url":null,"abstract":"This paper describes how a Cyclic Softened Membrane Model (CSMM) was developed to rationally predict the cyclic shear responses of reinforced concrete (RC) elements, including the pinching effect in the hysteretic loops, the shear stiffness, the shear ductility and the energy dissipation capacities. This CSMM model was verified by the tests of fifteen RC panels at the University of Houston. The test results confirmed that the orientation of the steel bars and the percentage of steel in a panel are the two most important variables that influence the cyclic response of RC panel elements. Using OpenSees as a framework, the concept of the CSMM was simplified from a 2-D model into a 1-D model and implemented into a finite fiber element program for the prediction of concrete frame structures subjected to cyclic or dynamic loading. The developed program is validated by the reversed cyclic load tests of a reinforced concrete column and by the shake table tests of a prestressed concrete frame. The CSMM has recently been implemented into an OpenSees-based finite element program for a 2-D RC element that will allow structural engineers to predict the monotonic, cyclic and dynamic responses of structures containing walls. This 2-D RC element is validated in this paper by the prediction of the monotonic responses of two RC panels subjected to shear stresses.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"16 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":"126964611","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}

{"title":"Deterioration Mechanism of Shear-Resisting System in RC Beam Subjected to Reversed Cyclic Loading after Flexural Yielding","authors":"H. Kinugasa, S. Nomura","doi":"10.14359/18232","DOIUrl":"https://doi.org/10.14359/18232","url":null,"abstract":"Based on cyclic tests of RC beams that failed in flexural-shear without yielding of the transverse reinforcement, a mechanism controlling flexural shear failure is proposed. This mechanism, which is associated with ‘Error Catastrophe’ known as a theory of aging, was observed in the hinge region of the beams. The results of experimental testing indicate that a shear-resisting system forms in the flexural hinge region of a RC beam subjected to monotonic loading. Under reversed cyclic loading, the shear-resisting system temporarily disappears as cracks open and then is rebuilt as cracks close. A flexural shear failure occurs when the shear resisting mechanism is not rebuilt upon load reversal. What inhibits the rebuilding process and, ultimately, results in a failure to rebuild, is “errors” in the rebuilding process. These errors accumulate each time the shear-resisting system is rebuilt, and when the errors exceeded a certain tolerance, failure due to the malfunction of the rebuilding occurs.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"172 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":"117315288","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}

{"title":"Three-Dimensional FEM Analysis of RC Beam-Column Joints Subjected to Two-Directional Loads","authors":"H. Noguchi","doi":"10.14359/18251","DOIUrl":"https://doi.org/10.14359/18251","url":null,"abstract":"This paper describes how seismic design provisions for beam-column joints in the Architectural Institute of Japan (AIJ) guidelines are based mainly on earlier experimental studies. However, it is necessary to establish a more rational, performance-based design method, especially for joints that are subjected to two directional seismic forces. This can be accomplished by analytical study of the stress transfer mechanisms in joints. In order to understand the progression of damage in joint concrete, accumulated absorbed strain energy for concrete and reinforcement was calculated from the results of finite element method (FEM) analysis. The stress transfer mechanisms and progression of damage in concrete and reinforcement provide a basis for establishing a more rational, performance-based design method for RC structures.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"83 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":"116621485","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}

{"title":"Analytical Study of Torsional Moment Induced by Shifting of Shear Center of RC Cross Sections","authors":"H. Nakamura, Yoshihito Yamamoto, A. Itoh, T. Tanabe","doi":"10.14359/18253","DOIUrl":"https://doi.org/10.14359/18253","url":null,"abstract":"This paper describes how, for members with symmetric cross-sections, the geometric centroid and shear center are coincident. Thus, if lateral load is applied through the geometric centroid, a torsional moment is not induced. However, a reinforced concrete (RC) cross section typically develops an asymmetric resistance mechanisms, resulting in progressive movement of the shear center away from the geometric centroid as nonlinearity increases and the section responds to bi-axial loading. In this paper, the mechanism causing shifting of the shear center for RC cross sections was investigated using frame elements with a fiber-type discretization of the member cross-section. Then, the effects of the torsional moment induced by the shifting of the shear center were discussed, and it was shown that the effect in not negligible in practical design.","PeriodicalId":332885,"journal":{"name":"SP-237: Finite Element Analysis of Reinforced Concrete Structures","volume":"324 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":"133870843","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}