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JournalISSN: 0044-8001

Journal of the Structural Division 

American Society of Civil Engineers
About: Journal of the Structural Division is an academic journal. The journal publishes majorly in the area(s): Buckling & Beam (structure). It has an ISSN identifier of 0044-8001. Over the lifetime, 2853 publications have been published receiving 59544 citations.


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Journal ArticleDOI
TL;DR: In this article, the authors examined existing experimental evidence for the stress-strain curve for concrete confined by transverse steel hoops or spirals and used it to determine the moment-curvature characteristics of flexural members with confined concrete.
Abstract: Existing experimental evidence for the stress-strain curve for concrete confined by transverse steel hoops or spirals is examined and used to determine the moment-curvature characteristics of flexural members with confined concrete The stress-strain curve for confined concrete is represented by a parabola up to maximum stress, a linear falling branch followed by a straight horizontal portion The slope of the linear falling branch is found as a function of the volume and spacing of the hoop steel and the strength of the concrete The compressive stress block parameters for flexural members with different levels of strain at the extreme compression fiber and quantities of confining steel are found from the proposed stress-strain curve The examination of the moment-curvature characteristics of beams with confined concrete showed that the quantity of confining steel only has a significant effect on the behavior of members with a high tension steel content and a low compression steel content

1,522 citations

Journal ArticleDOI
TL;DR: In this article, a model for predicting the dynamic response of a reinforced concrete member was proposed based on a static force-displacement relationship which reflected the changes in stiffness for loading and unloading as a function of the previous loading history.
Abstract: A series of reinforced concrete specimens has been subjected to static tests as well as periodic and simulated earthquake motions to develop realistic analytical models for the earthquake response of the elements and materials involved. During some of the dynamic tests the specimen responded with a displacement of the order of six times the initial yield deflection. The stiffness and energy absorbing capacity of the specimens changed considerably and, at times, very rapidly during the dynamic tests. A realistic conceptual model for predicting the dynamic response of a reinforced concrete member should be based on a static force-displacement relationship which reflects the changes in stiffness for loading and unloading as a function of the previous loading history. The dynamic response calculated on the basis of the proposed force-displacement relationship resulted in satisfactory agreement with the measured response. With the hysteresis loops defined by the proposed force-displacement relationship, it was not necessary to invoke additional sources of energy absorption for a satisfactory prediction of the dynamic response.

1,107 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental study of the strength and behavior of plain concrete subjected to repetitions of compressive stress of relatively high magnitude is described and evaluated, and the characteristics of the loading and unloading stress-strain relationships of 46 short rectangular columns are studied.
Abstract: An experimental study of the strength and behavior of plain concrete subjected to repetitions of compressive stress of relatively high magnitude is described and evaluated. The characteristics of the loading and unloading stress-strain relationships of 46 short rectangular columns are studied. Expressions for these relationships are derived and used to estimate the response of plain concrete subjected to varying load histories. The expressions developed are functions of the ultimate stress and strain values of standard 6 × 12-in. control cylinders and the loading history. The results indicate that the response at a given point in the load history is dependent on the preceeding loading and that the number of cycles to failure can be reasonably estimated.

667 citations

Journal ArticleDOI
TL;DR: In this paper, a brief review showed considerable differences in the quantity of rectangular hoops required by various seismic design codes in the potential plastic hinge regions of rectangular reinforced concrete columns and demonstrated very ductile behaviour when loaded by simulated seismic loading up to displacement ductility factors of at least 6, confirming the adequacy of the proposed design provisions.
Abstract: A brief review showed considerable differences in the quantity of rectangular hoops required by various seismic design codes in the potential plastic hinge regions of rectangular reinforced concrete columns. Tests conducted on four nearly full size reinforced concrete columns with a 550 mm (21.7 in) square cross section, various axial load levels, and various quantities of rectangular hoops, are described. The hoops were designed according to the recommendations of the draft New Zealand Concrete Design Code. The columns demonstrated very ductile behaviour when loaded by simulated seismic loading up to displacement ductility factors of at least 6, confirming the adequacy of the proposed design provisions. Considerable enhancement of flexural strength was observed over that calculated by normal code design procedures, but the enhancement could be accounted for a refined flexural strength analysis which included the effect of strain hardening of the longitudinal steel and the increase in strength and ductility of the confined concrete. Maximum compressive concrete strains in the range 0.016 to 0.026 were measured on the surface of the confined concrete core at the peak displacements.

592 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present the concept of structural control as an alternative approach to the safety problems of structural engineering and demonstrate the practicality of this concept using analog parallel logic devices.
Abstract: In an ideal situation, completely safe structures can be designed if exact information is known concerning loads and strengths involved during the lifetime of these structures, and exact methods of structural analysis are available. In the real world uncertainties exist in this information as well as in the method of analysis. To account for these uncertainties, various factors of safety have been used in the design of structures. Probabilistic methods have been applied for the interpretation as well as determination of these factors of safety. Techniques in structural analysis are being refined continuously. The objective herein is to present the concept of structural control as an alternative approach to the safety problems of structural engineering. Pertinent points of the control theory are reviewed along with certain pioneering work in this direction. The practicality of this concept is illustrated with an example using analog parallel logic devices.

573 citations

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Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
20111
19881
1982174
1981142
1980152
1979164