Frame analysis incorporating semi-rigid joint action: Applicability of the half initial Secant stiffness approach

Keulen, D.C. van; Nethercot, D.A.; Snijder, H.H.; Bakker, M.C.M.

doi:10.1016/s0143-974x(03)00031-2

Cited by 33 publications

(18 citation statements)

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“…Two different models are employed to capture the nonlinear behaviors of semi-rigid connections in this study. The first one is the bilinear semi-rigid connection model presented by Keulen et al [8]. The model is adopted in the classic examples to verify the correctness of the approach proposed.…”

Section: Semi-rigid Connection Modelsmentioning

confidence: 99%

“…In Example 3.4, the snap-through buckling behavior of steel frames is investigated in detail to reflect the advantages of the proposed procedure. Different from the above examples, Example 3.5 introduces the bilinear semi-rigid connection model proposed by Keulen et al [8] into the MDEM for the static analysis of single-story and three-story frames with semi-rigid connections. In order to capture the nonlinear behavior and hysteresis performance of semi-rigid connections more accurately, the Example 3.6 adopts the Richard-Abbort four-parameter model [5] given in Section 2.2 for dynamic analysis of the double-span, six-story Vogel steel frame under cyclic loading.…”

Section: Examplesmentioning

confidence: 99%

“…The bilinear semi-rigid connection model presented by Keulen et al [8] is adopted to simulate the nonlinear behavior of semi-rigid connections. Figure 13 shows the detail configuration of a steel portal frame.…”

Section: Static Analysis Of a Steel Portal Frame With Bilinear Semi-rmentioning

confidence: 99%

“…Furthermore, Eurccode-3 (EC3) [7] provides the M-θ curves for some specified beam-to column joints of steel structures. Based on the M-θ curves of EC3, Keulen et al [8] introduced the half initial secant stiffness approach to simplify the full characteristics of nonlinear connection stiffness curve into a bilinear curve in practical design, and analysis results of the two cases were in good agreement. Thus, numerical simulation methods of semi-rigid joints have increasingly attracted the attentions of numerous researchers in recent years.…”

Section: Introductionmentioning

confidence: 99%

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Member Discrete Element Method for Static and Dynamic Responses Analysis of Steel Frames with Semi-Rigid Joints

2017

Applied Sciences

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Featured Application: The MDEM can naturally deal with strong nonlinearity and discontinuity. A unified computational framework is applied for static and dynamic analyses. The method is an effective tool to investigate complex behaviors of steel frames with semi-rigid connections.Abstract: In this paper, a simple and effective numerical approach is presented on the basis of the Member Discrete Element Method (MDEM) to investigate static and dynamic responses of steel frames with semi-rigid joints. In the MDEM, structures are discretized into a set of finite rigid particles. The motion equation of each particle is solved by the central difference method and two adjacent arbitrarily particles are connected by the contact constitutive model. The above characteristics means that the MDEM is able to naturally handle structural geometric nonlinearity and fracture. Meanwhile, the computational framework of static analysis is consistent with that of dynamic analysis, except the determination of damping. A virtual spring element with two particles but without actual mass and length is used to simulate the mechanical behaviors of semi-rigid joints. The spring element is not directly involved in the calculation, but is employed only to modify the stiffness coefficients of contact elements at the semi-rigid connections. Based on the above-mentioned concept, the modified formula of the contact element stiffness with consideration of semi-rigid connections is deduced. The Richard-Abbort four-parameter model and independent hardening model are further introduced accordingly to accurately capture the nonlinearity and hysteresis performance of semi-rigid connections. Finally, the numerical approach proposed is verified by complex behaviors of steel frames with semi-rigid connections such as geometric nonlinearity, snap-through buckling, dynamic responses and fracture. The comparison of static and dynamic responses obtained using the modified MDEM and those of the published studies illustrates that the modified MDEM can simulate the mechanical behaviors of semi-rigid connections simply and directly, and can accurately effectively capture the linear and nonlinear behaviors of semi-rigid connections under static and dynamic loading. Some conclusions, as expected, are drawn that structural bearing capacity under static loading will be overestimated if semi-rigid connections are ignored; when the frequency of dynamic load applied is close to structural fundamental frequency, hysteresis damping of nonlinear semi-rigid connections can cause energy dissipation compared to rigid and linear semi-rigid connections, thus avoiding the occurrence of resonance. Additionally, fracture analysis also indicates that semi-rigid steel frames possess more anti-collapse capacity than that with rigid steel frames.

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Section: Semi-rigid Connection Modelsmentioning

confidence: 99%

Section: Examplesmentioning

confidence: 99%

Section: Static Analysis Of a Steel Portal Frame With Bilinear Semi-rmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Member Discrete Element Method for Static and Dynamic Responses Analysis of Steel Frames with Semi-Rigid Joints

2017

Applied Sciences

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“…In most cases, global analyses of structures are still performed according to the assumption that joints are either ideally rigid or ideally pinned, in spite of the fact that majority of the joints are neither ideally rigid nor ideally pinned (Chen et al 1996;Hasan et al 1998;Goto, Miyashita 1998;van Keulen et al 2003). In most cases, design soft allows applying semi-rigid joints; however, designers have little experience in the field, which limits a wide use of semi-rigid joint concept.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Column Web Panel Behaviour on the Characteristics of a Beam-to-Column Joint

Daniūnas

Urbonas

2013

Journal of Civil Engineering and Management

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Abstract. The paper reviews the importance of evaluation of actual joint behaviour during the design and manufacture of frame construction. The authors applied the component method, which is used in Eurocode 3. Additionally, they provided a short overview of beam-to-column joint components. The research focuses on one part of the joint-column web panel. It investigates the influence of the column web panel to the rotational stiffness and design moment resistance of the joint. The article presents several possibilities for stiffening the column web panel plate. Calculation results illustrate the influence of the characteristics of column web panel to the rotational stiffness and design moment resistance of the joint. Calculations were carried out both with an unstiffened and with a stiffened column web panel plates. The results confirmed the expected assumptions, i.e. the column web panel is an essential part of the joint, and its behaviour has a significant influence on the rotational stiffness and design moment resistance of the joint. In all calculations where column web panel was stiffened, the rotational stiffness and design moment resistance of the joint increased.

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Numerical Simulation of Large-Displacement Behaviour of Thin-Walled Frames Incorporating Joint Action

Turkalj

Kravanja

Merdanović

2013

Design, Fabrication and Economy of Metal Structures

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Frame analysis incorporating semi-rigid joint action: Applicability of the half initial Secant stiffness approach

Cited by 33 publications

References 1 publication

Member Discrete Element Method for Static and Dynamic Responses Analysis of Steel Frames with Semi-Rigid Joints

Member Discrete Element Method for Static and Dynamic Responses Analysis of Steel Frames with Semi-Rigid Joints

Influence of the Column Web Panel Behaviour on the Characteristics of a Beam-to-Column Joint

Numerical Simulation of Large-Displacement Behaviour of Thin-Walled Frames Incorporating Joint Action

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