Simplified monotonic moment–curvature relation considering fixed-end rotation and axial force effect

Kwak, Hyo–Gyoung; Kim, Sun-Pil

doi:10.1016/j.engstruct.2009.08.017

Cited by 35 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…; Bai and Au ; Lam et al . ; Kwak and Kim ). Assumption (e) is not exact but, nevertheless, a fairly reasonable assumption (Ho et al .…”

Section: Nonlinear Moment–curvature Analysismentioning

confidence: 96%

Deformability design of high‐performance concrete beams

2011

Structural Design Tall Build

View full text Add to dashboard Cite

SUMMARY The use of high‐performance materials (HPMs) such as high‐strength concrete (HSC) and high‐strength steel (HSS) is becoming more popular in the construction of beams and columns of tall buildings. These HPMs not only increase the stiffness and decrease the strength‐to‐weight ratio, but also provide a more sustainable construction method by minimising the construction materials needed. However, HSC and HSS are more brittle than normal‐strength concrete and steel, respectively. Therefore, it will adversely affect the deformability of concrete beams. To evaluate the pros and cons of adopting HPM in beam design, the author will investigate the flexural strength and deformability of concrete beams made of HPMs. The deformability in this study is expressed in normalised rotation capacity and investigated by a parametric study using nonlinear moment–curvature analysis taking into account the degree of reinforcement, confining pressure, concrete and steel yield strength. From the results, it is evident that the deformability of concrete beams increases as the degree of reinforcement decreases or confining pressure increases. However, the effects of concrete and steel yield strength depend on other factors. For practical design purpose, charts and formulas are produced for designing high‐performance concrete beams to meet with specified flexural strength and deformability requirement. Copyright © 2011 John Wiley & Sons, Ltd.

show abstract

“…; Bai and Au ; Lam et al . ; Kwak and Kim ). Assumption (e) is not exact but, nevertheless, a fairly reasonable assumption (Ho et al .…”

Section: Nonlinear Moment–curvature Analysismentioning

confidence: 96%

Deformability design of high‐performance concrete beams

2011

Structural Design Tall Build

View full text Add to dashboard Cite

show abstract

“…This element (Kwon et al, 2005;Kwak, 1994;Yin and Lu, 2010) has been commonly used in the finite element analysis of CFT columns. A few numerical analyses considering the bond-slip effect have been conducted by using the bond-link element (Bashir et al, 2010;Kwak and Kim, 2010;Li et al, 2012). However, owing to the complications in the numerical modeling with a considerable increase in the number of degrees of freedom caused by the use of double nodes, most finite element studies of CFT columns do not take into account the bond-slip developed at the interface between the concrete core and the steel tube (Johansson and Gylltoft, 2002;Kwon et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

FE analysis of circular CFT columns considering bond-slip effect: A numerical formulation

Hwang

Kwak

2018

Mech. Sci.

Self Cite

View full text Add to dashboard Cite

Abstract. In this paper, a numerical model for the analysis of bond-slip occurring in concrete filled steel tube (CFT) columns is introduced. Unlike the classical bond-link or bond-zone element using double nodes, the introduced model considers the bond-slip effect without taking double nodes by incorporation of the equivalent steel stiffness. Upon constructing the equations system on the basis of the force equilibrium and the compatibility condition at each nodal point, the deformations in a steel tube are determined, followed by evaluation of the bond-slip. Moreover, as a part of solving the equations system to evaluate the slip behavior, the mechanical properties for steel and bond-slip have been changed and updated through an iteration procedure. Finally, the validity of the introduced numerical model is verified by comparing the experimental data with the analytical results for CFT columns subjected to axial force and bending moment.

show abstract

“…Seismic design is, in general, a very time‐consuming process, so the expressions and models involved need to be as effective as possible from a computational point of view. Several authors present exhaustive computational procedures based on iterative processes to find the analytical moment–curvature relation of RC sections , , . Among these procedures, section discretization into fibres is the proper way of obtaining the complete moment–curvature diagram for RC sections with non‐ordinary geometry, despite the increase in the computational time , .…”

Section: Introductionmentioning

confidence: 99%

Behaviour of reinforced concrete rectangular sections based on tests complying with seismic construction requirements

López-López

Espín

Sánchez-Olivares

2016

Structural Concrete

View full text Add to dashboard Cite

Behaviour of reinforced concrete rectangular sections based on tests complying with seismic construction requirementsThe prediction of the seismic behaviour of reinforced concrete elements using numerical models has become a field of growing interest in recent years due to the importance of the effects induced by seismic loads applied to reinforced concrete structures. The simulation of the hysteretic behaviour of the plastic hinges generated in the structure when the seismic load acts requires the use of models that are able to describe the sectional behaviour of structural members. Thus, the main objective of the present paper is the adjustment of several empirical expressions that reduce the computational time needed to simulate the yield and ultimate behaviour of a given reinforced concrete rectangular section under either monotonic or cyclic loading. The expressions are calibrated with a selection of tests, taken from a published database of more than 1000 tests, according to the criterion that the selected specimens comply with the seismic construction requirements of the main international building codes . Owing to their robustness and the acceptable computation time for low-dimensional problems, genetic algorithms are used for this calibration. The equations proposed can be employed by structural engineers for the design and analysis of actual structural elements used in ordinary reinforced concrete buildings located in seismic areas, and provide more accurate results than other expressions.

show abstract

Simplified monotonic moment–curvature relation considering fixed-end rotation and axial force effect

Cited by 35 publications

References 14 publications

Deformability design of high‐performance concrete beams

Deformability design of high‐performance concrete beams

FE analysis of circular CFT columns considering bond-slip effect: A numerical formulation

Behaviour of reinforced concrete rectangular sections based on tests complying with seismic construction requirements

Contact Info

Product

Resources

About