The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Yong Wang - One of the best experts on this subject based on the ideXlab platform.
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shear and bending behaviour of fin plate connection to concrete filled rectangular steel tubular column development of a simplified Calculation method
Journal of Constructional Steel Research, 2010Co-Authors: M H Jones, Yong WangAbstract:Abstract This paper presents the results of numerical and theoretical studies into the behaviour of simple welded fin-plate to concrete-filled tubular (CFT) columns loaded by tensile force. Such connections represent a simple single-sided joint solution to steel CFTs. The current design method for similar connections under purely tensile load, in CIDECT Guide 9, based on a deformation limit of 0.03 of the tube width is shown to be inadequate when evaluating the ultimate strength of such connections. Hence numerical models have been developed and used to perform extensive parametric studies from which a simple Hand Calculation method has been developed for evaluating the strength of the column component of rectangular CFTs under tensile load imparted through a fin-plate connection. The ranges of parameters encompassed by the model include column cross-section size, column thickness and fin-plate length. The simple Hand Calculation procedure is based upon defining a rigid plate deformation pattern for the column face and then applying the virtual work principle. The column face deformation corresponding to the maximum load has been found to be strongly related to the column width to thickness ratio and a method for evaluating this relationship has been proposed based on extensive numerical results. The load–deflection curve consists of two segments: the first representing the elastic behaviour from classic plate theory, the second obtained by plotting the deflection at failure against failure load — both of which are obtained through the simple Hand Calculation procedure. The simple Hand Calculation method is compared favorably with a large range of finite element simulations. The proposed method may be used in the component based method for joints involving a fin-plate component in tension.
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Shear and bending behaviour of fin plate connection to concrete filled rectangular steel tubular column — Development of a simplified Calculation method
Journal of Constructional Steel Research, 2009Co-Authors: M H Jones, Yong WangAbstract:Abstract This paper presents the results of numerical and theoretical studies into the behaviour of simple welded fin-plate to concrete-filled tubular (CFT) columns loaded by tensile force. Such connections represent a simple single-sided joint solution to steel CFTs. The current design method for similar connections under purely tensile load, in CIDECT Guide 9, based on a deformation limit of 0.03 of the tube width is shown to be inadequate when evaluating the ultimate strength of such connections. Hence numerical models have been developed and used to perform extensive parametric studies from which a simple Hand Calculation method has been developed for evaluating the strength of the column component of rectangular CFTs under tensile load imparted through a fin-plate connection. The ranges of parameters encompassed by the model include column cross-section size, column thickness and fin-plate length. The simple Hand Calculation procedure is based upon defining a rigid plate deformation pattern for the column face and then applying the virtual work principle. The column face deformation corresponding to the maximum load has been found to be strongly related to the column width to thickness ratio and a method for evaluating this relationship has been proposed based on extensive numerical results. The load–deflection curve consists of two segments: the first representing the elastic behaviour from classic plate theory, the second obtained by plotting the deflection at failure against failure load — both of which are obtained through the simple Hand Calculation procedure. The simple Hand Calculation method is compared favorably with a large range of finite element simulations. The proposed method may be used in the component based method for joints involving a fin-plate component in tension.
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analysis of catenary action in steel beams using a simplified Hand Calculation method part 2 validation for non uniform temperature distribution
Journal of Constructional Steel Research, 2005Co-Authors: Yong WangAbstract:To enable the general analytical method, presented in the companion paper, to be applied to beams with non-uniform temperature distributions, additional assumptions are made about the beam’s deflection profiles. In this paper, it is assumed that for a beam with non-uniform temperature distribution and under concentrated loads, its mechanical deflection profile should be the average of the deflection profile under uniformly distributed load and the free bending moment profile of the beam under concentrated load. The results of various validation examples show that this assumption and the general analytical method are able to give close approximation to numerical simulation results. From detailed investigations, it has been found that catenary forces in a beam are not sensitive to different non-uniform temperature distributions. Furthermore, for safe prediction of catenary forces, complete end axial restraint and zero end rotational restraint may be assumed.
John J Carroll - One of the best experts on this subject based on the ideXlab platform.
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Hand Calculation methods
Natural Gas Hydrates (Third Edition)#R##N#A Guide for Engineers, 2014Co-Authors: John J CarrollAbstract:This chapter explores Hand Calculation methods useful for rapid estimation of the hydrate formation conditions. Unfortunately, the drawback to these methods is that they are not highly accurate. Moreover, in general, the less information required as input, the less accurate the results of the Calculation. In spite of this, these methods remain quite popular. There are two commonly employed methods for rapidly estimating the conditions at which hydrates will form. Both are attributed to Katz and coworkers. The two methods are distinguished by the names “gas gravity” and “K-factor.” The gas gravity method involves only a single chart which is simple to use. For example, if one know the pressure, temperature, and gas gravity and wants to know if one is in a region where a hydrate will form; first, locate the pressure-temperature point on the chart. If this point is to the left and above the appropriate gravity curve, one is in the hydrate-forming region. If one is to the right and below, one is in the region where a hydrate will not form. Remember that hydrate formation is favored by high pressure and low temperature. The second method that lends itself to Hand Calculations is the K-factor method. A third chart method proposed by Baillie and Wichert is a gas gravity approachthat is more useful for sour gas mixtures.
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chapter three Hand Calculation methods
Natural Gas Hydrates (Second Edition)#R##N#A Guide for Engineerss, 2009Co-Authors: John J CarrollAbstract:Publisher Summary This chapter explores Hand Calculation methods useful for rapid estimation of the hydrate formation conditions. Unfortunately, the drawback to these methods is that they are not highly accurate. Moreover, in general, the less information required as input, the less accurate the results of the Calculation. In spite of this, these methods remain quite popular. There are two commonly employed methods for rapidly estimating the conditions at which hydrates will form. Both are attributed to Katz and coworkers. The two methods are distinguished by the names “gas gravity” and “K-factor.” The gas gravity method involves only a single chart which is simple to use. For example, if one know the pressure, temperature, and gas gravity and wants to know if one is in a region where a hydrate will form; first, locate the pressure-temperature point on the chart. If this point is to the left and above the appropriate gravity curve, one is in the hydrate-forming region. If one is to the right and below, one is in the region where a hydrate will not form. Remember that hydrate formation is favored by high pressure and low temperature. The second method that lends itself to Hand Calculations is the K-factor method. A third chart method proposed by Baillie and Wichert is a gas gravity approachthat is more useful for sour gas mixtures.
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Chapter three – Hand Calculation methods
Natural Gas Hydrates, 2009Co-Authors: John J CarrollAbstract:Publisher Summary This chapter explores Hand Calculation methods useful for rapid estimation of the hydrate formation conditions. Unfortunately, the drawback to these methods is that they are not highly accurate. Moreover, in general, the less information required as input, the less accurate the results of the Calculation. In spite of this, these methods remain quite popular. There are two commonly employed methods for rapidly estimating the conditions at which hydrates will form. Both are attributed to Katz and coworkers. The two methods are distinguished by the names “gas gravity” and “K-factor.” The gas gravity method involves only a single chart which is simple to use. For example, if one know the pressure, temperature, and gas gravity and wants to know if one is in a region where a hydrate will form; first, locate the pressure-temperature point on the chart. If this point is to the left and above the appropriate gravity curve, one is in the hydrate-forming region. If one is to the right and below, one is in the region where a hydrate will not form. Remember that hydrate formation is favored by high pressure and low temperature. The second method that lends itself to Hand Calculations is the K-factor method. A third chart method proposed by Baillie and Wichert is a gas gravity approachthat is more useful for sour gas mixtures.
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chapter 3 Hand Calculation methods
Natural Gas Hydrates#R##N#A Guide for Engineers, 2003Co-Authors: John J CarrollAbstract:Publisher Summary Hand Calculation methods are useful for rapid estimation of hydrate formation conditions. Two methods are commonly employed for rapidly estimating the conditions at which hydrates will form. They are: the gas gravity method and the K-factor method. The gas gravity method is simple, involving only a single chart. The chart is simply a plot of pressure and temperature, with the specific gravity of the gas as a third parameter. The K-factor method is designed for Calculations involving a gas and a hydrate. The K-factor is defined as the distribution of the component between the hydrate and the gas. The K-factor method, as given on the companion Website, is surprisingly accurate for predicting the hydrate locus of pure methane, ethane, carbon dioxide, and hydrogen sulfide. Baillie and Wichert developed another chart method for hydrate prediction. The basis for this chart is the gas gravity, but the chart is significantly more complex than the Katz gravity method. Despite their relative simplicity, these methods are surprisingly accurate. The Baillie-Wichert method is better than the gas gravity method when applied to sweet gas because of the inclusion of a correction factor for propane. The real advantage of this method is that it is applicable to sour gas mixtures.
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Chapter 3 – Hand Calculation Methods
Natural Gas Hydrates, 2003Co-Authors: John J CarrollAbstract:Publisher Summary Hand Calculation methods are useful for rapid estimation of hydrate formation conditions. Two methods are commonly employed for rapidly estimating the conditions at which hydrates will form. They are: the gas gravity method and the K-factor method. The gas gravity method is simple, involving only a single chart. The chart is simply a plot of pressure and temperature, with the specific gravity of the gas as a third parameter. The K-factor method is designed for Calculations involving a gas and a hydrate. The K-factor is defined as the distribution of the component between the hydrate and the gas. The K-factor method, as given on the companion Website, is surprisingly accurate for predicting the hydrate locus of pure methane, ethane, carbon dioxide, and hydrogen sulfide. Baillie and Wichert developed another chart method for hydrate prediction. The basis for this chart is the gas gravity, but the chart is significantly more complex than the Katz gravity method. Despite their relative simplicity, these methods are surprisingly accurate. The Baillie-Wichert method is better than the gas gravity method when applied to sweet gas because of the inclusion of a correction factor for propane. The real advantage of this method is that it is applicable to sour gas mixtures.
Luis Simoes Da Silva - One of the best experts on this subject based on the ideXlab platform.
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Connections in towers for wind converters, Part II: The friction connection behaviour
Journal of Constructional Steel Research, 2015Co-Authors: Marko Pavlović, Milan Veljkovic, Christine Heistermann, Markus Feldmann, Carlos Rebelo, Luis Simoes Da SilvaAbstract:Abstract A novel friction connection consisting of a single lap joint with long open slotted holes is proposed for use in tubular towers for wind converters for in-situ connections. This is a competitive alternative to the common ring flange connection as it has been shown in the European Project “HISTWIN”. Two sets of experiments are analysed: the down-scaled tubular steel tower 4-point bending experiments using high-strength bolts M20 and a single lap joint using plate thickness 25 mm and tension control bolts M30. The main motivation for this paper is a much higher bending resistance obtained in the 4-point bending experiments compared to predictions based on Hand-Calculation models. Results of experiments are used to validate finite element analysis (FEA). Explicit solver and the most realistic geometry of the bolts are the main characteristics of the FEA performed. Very good agreement between the experiments and FEA results is obtained, which provides credibility of the computational approach used to thoroughly examine experimental results. New evidences of the friction connection behaviour are provided: a short-term loss of preloading force due to external loading, transfer of shear force in the single lap joint and influence of the slotted hole on the joint resistance. Results obtained from Hand-Calculation models are used to predict the loss of preloading, the bending resistance of the connection and meridional stresses in the tower shell in the vicinity of the connection, which are compared to the experiments and the FEA. Recommendations related to use of the Hand-Calculation models in the design are provided.
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numerical study of steel beams in sub frame assembly validation of existing Hand Calculation procedures
Journal of Structural Fire Engineering, 2015Co-Authors: Naveed Iqbal, Tim Heistermann, Milan Veljkovic, Fernanda Lopes, Aldina Santiago, Luis Simoes Da SilvaAbstract:The design methods currently proposed by the codes prescribe the strength assessment of structures to be based on their strength limit state. These design methods can be applied to isolated steel members to determine their design strengthin fire. The real response of a structural member is, however, more complex due to the thermal expansion and the presence of restraints against this expansion by the surrounding structure. It is therefore imperative to study the response of a structural member at high temperature in a way which includes its interaction with its surroundings. This paper focus on the numerical investigation of steel beams in structural frames connected to concrete filled tubular (CFT) columns through reverse channel connections and comparison to Hand Calculation procedures. Finite element models (FEM) of the sub-frames were validated against fire tests conducted on sub-frames and then their results were compared to the proposed simplified Hand Calculation procedures (HCM).
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steel beam behaviour in standard and natural fires comparison of fe modelling and Hand Calculation procedures
European Conference on Steel and Composite Structures : 10 09 2014 - 12 09 2014, 2014Co-Authors: Naveed Iqbal, Tim Heistermann, Milan Veljkovic, Fernanda Lopes, Aldina Santiago, Luis Simoes Da SilvaAbstract:Steel beam behaviour in standard and natural fires : Comparison of FE modelling and Hand Calculation procedures
M H Jones - One of the best experts on this subject based on the ideXlab platform.
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shear and bending behaviour of fin plate connection to concrete filled rectangular steel tubular column development of a simplified Calculation method
Journal of Constructional Steel Research, 2010Co-Authors: M H Jones, Yong WangAbstract:Abstract This paper presents the results of numerical and theoretical studies into the behaviour of simple welded fin-plate to concrete-filled tubular (CFT) columns loaded by tensile force. Such connections represent a simple single-sided joint solution to steel CFTs. The current design method for similar connections under purely tensile load, in CIDECT Guide 9, based on a deformation limit of 0.03 of the tube width is shown to be inadequate when evaluating the ultimate strength of such connections. Hence numerical models have been developed and used to perform extensive parametric studies from which a simple Hand Calculation method has been developed for evaluating the strength of the column component of rectangular CFTs under tensile load imparted through a fin-plate connection. The ranges of parameters encompassed by the model include column cross-section size, column thickness and fin-plate length. The simple Hand Calculation procedure is based upon defining a rigid plate deformation pattern for the column face and then applying the virtual work principle. The column face deformation corresponding to the maximum load has been found to be strongly related to the column width to thickness ratio and a method for evaluating this relationship has been proposed based on extensive numerical results. The load–deflection curve consists of two segments: the first representing the elastic behaviour from classic plate theory, the second obtained by plotting the deflection at failure against failure load — both of which are obtained through the simple Hand Calculation procedure. The simple Hand Calculation method is compared favorably with a large range of finite element simulations. The proposed method may be used in the component based method for joints involving a fin-plate component in tension.
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Shear and bending behaviour of fin plate connection to concrete filled rectangular steel tubular column — Development of a simplified Calculation method
Journal of Constructional Steel Research, 2009Co-Authors: M H Jones, Yong WangAbstract:Abstract This paper presents the results of numerical and theoretical studies into the behaviour of simple welded fin-plate to concrete-filled tubular (CFT) columns loaded by tensile force. Such connections represent a simple single-sided joint solution to steel CFTs. The current design method for similar connections under purely tensile load, in CIDECT Guide 9, based on a deformation limit of 0.03 of the tube width is shown to be inadequate when evaluating the ultimate strength of such connections. Hence numerical models have been developed and used to perform extensive parametric studies from which a simple Hand Calculation method has been developed for evaluating the strength of the column component of rectangular CFTs under tensile load imparted through a fin-plate connection. The ranges of parameters encompassed by the model include column cross-section size, column thickness and fin-plate length. The simple Hand Calculation procedure is based upon defining a rigid plate deformation pattern for the column face and then applying the virtual work principle. The column face deformation corresponding to the maximum load has been found to be strongly related to the column width to thickness ratio and a method for evaluating this relationship has been proposed based on extensive numerical results. The load–deflection curve consists of two segments: the first representing the elastic behaviour from classic plate theory, the second obtained by plotting the deflection at failure against failure load — both of which are obtained through the simple Hand Calculation procedure. The simple Hand Calculation method is compared favorably with a large range of finite element simulations. The proposed method may be used in the component based method for joints involving a fin-plate component in tension.
Naveed Iqbal - One of the best experts on this subject based on the ideXlab platform.
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numerical study of steel beams in sub frame assembly validation of existing Hand Calculation procedures
Journal of Structural Fire Engineering, 2015Co-Authors: Naveed Iqbal, Tim Heistermann, Milan Veljkovic, Fernanda Lopes, Aldina Santiago, Luis Simoes Da SilvaAbstract:The design methods currently proposed by the codes prescribe the strength assessment of structures to be based on their strength limit state. These design methods can be applied to isolated steel members to determine their design strengthin fire. The real response of a structural member is, however, more complex due to the thermal expansion and the presence of restraints against this expansion by the surrounding structure. It is therefore imperative to study the response of a structural member at high temperature in a way which includes its interaction with its surroundings. This paper focus on the numerical investigation of steel beams in structural frames connected to concrete filled tubular (CFT) columns through reverse channel connections and comparison to Hand Calculation procedures. Finite element models (FEM) of the sub-frames were validated against fire tests conducted on sub-frames and then their results were compared to the proposed simplified Hand Calculation procedures (HCM).
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steel beam behaviour in standard and natural fires comparison of fe modelling and Hand Calculation procedures
European Conference on Steel and Composite Structures : 10 09 2014 - 12 09 2014, 2014Co-Authors: Naveed Iqbal, Tim Heistermann, Milan Veljkovic, Fernanda Lopes, Aldina Santiago, Luis Simoes Da SilvaAbstract:Steel beam behaviour in standard and natural fires : Comparison of FE modelling and Hand Calculation procedures
