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Erling Murthasmith - One of the best experts on this subject based on the ideXlab platform.

  • Compression Member models for space trusses review
    Journal of Structural Engineering-asce, 1994
    Co-Authors: Erling Murthasmith
    Abstract:

    The computational models used for Compression Members in the nonlinear analysis of space trusses are classified by decreasing order of computational effort into finite‐segment, finite‐difference, and single‐Member solutions. The common assumptions and derivations used with single‐Member solutions are reviewed. A chronological review of the models is given indicating the contributions each has made. Single‐Member solutions can often give results similar to those that use more computationally demanding methods. However, the success of a model at correlating with experimental behavior depends on the assumptions made. Single‐Member solutions that include partial plasticity appear more accurate than those that assume full plasticity at midlength. It is observed that consideration also needs to be given to the relationship between the Member and the structure to which the Member is attached. Thus, internal snap‐through or dynamic jump can occur in the postbuckling regime of Compression Members in a relatively c...

A. R. Santhakumar - One of the best experts on this subject based on the ideXlab platform.

  • Reliability Analysis and Full-Scale Testing of Transmission Tower
    Journal of Structural Engineering-asce, 1996
    Co-Authors: M. J. Alam, A. R. Santhakumar
    Abstract:

    The new generation of reliability-based load and resistance factor design (LRFD) method for the design of electric transmission line structures at Member level is governed by \IASCE Manual 74\N. Transmission towers generally comprise steel angle components. The nominal strength of these components, for various end conditions and slenderness ratios, is widely calculated using the design equations in \IASCE Manual 52\N for the reliability-based design (RBD). There are known inconsistencies in the RBD of tower Members using these \IASCE Manuals\N, particularly in the case of Members in Compression. Considering these facts, the effect of buckling, joint connections, and framing eccentricities on the RBD of components have been examined and limiting values of the slenderness ratio (\IL\N/\Ir\N) for the Compression Member alone are proposed in this technical note. A 220-kV tangent tower has been used for full-scale testing to validate the analytical results, and a good agreement with the predicted results indicates a definite need for an improvement of \IASCE Manual 52\N and the relevant Indian standards.

Changgen Deng - One of the best experts on this subject based on the ideXlab platform.

  • Static behaviour of latticed-sleeved Compression Member with strip core
    Thin-Walled Structures, 2019
    Co-Authors: Chenhui Zhang, Changgen Deng
    Abstract:

    Abstract In this study, a finite element model was established and validated to investigate the mechanical behaviour of the latticed-sleeved Compression Member with strip core. Failure mechanism of the latticed-sleeved Compression Member was studied based on the core moment distribution and the effects of three reinforcement methods to increase the ultimate bearing capacity were compared. A parametric study was performed to investigate the effects of essential factors on the mechanical behaviours of the latticed-sleeved Compression Members. A method was adopted to control global buckling of the latticed-sleeved Compression Members. Based on the latticed-sleeved Compression Member, a capacity-monitoring Member was introduced to control buckling and monitor the bearing capacity of the key Compression Member. It is concluded that: the latticed-sleeved Compression Member has a greater resistance to buckling; mutual effects exist between the two failure modes, local buckling of the core segment and global buckling of the latticed-sleeved Compression Member; the gap between the core and sleeve, the sleeve stiffness and the core protrusion length above sleeve have effects on the mechanical behaviors of the latticed-sleeved Compression Members; the adopted method considering the mutual effects between the two failure modes can effectively control global buckling of the latticed-sleeved Compression Members; and the bearing capacity of latticed-sleeved Compression Member can be monitored through measuring the resultant axial force of the connecting bolts.

  • Theoretical study of sleeved Compression Members considering the core protrusion
    Structural Engineering and Mechanics, 2018
    Co-Authors: Chenhui Zhang, Changgen Deng
    Abstract:

    This paper presents a detailed theoretical study of the sleeved Compression Members based on a mechanical model. In the mechanical model, the core protrusion above sleeve and the contact force between the core and sleeve are specially taken into account. Via the theoretical analyses, load-displacement relationships of the sleeved Compression Members are obtained and verified by the experimental results. On the basis of the core moment distribution changing with the increase of the applied axial load, failure mechanism of the sleeved Compression Members is assumed and proved to be consistent with the experimental results in terms of the failure modes and the ultimate bearing capacities. A parametric study is conducted to quantify how essential factors including the core protrusion length above sleeve, stiffness ratio of the core to sleeve, core slenderness ratio and gap between the core and sleeve affect the mechanical behaviors of the sleeved Compression Members, and it is concluded that the constrained effect of the sleeve is overestimated neglecting the core protrusion; the improvement of ultimate bearing capacity for the sleeved Compression Member is considered to be decreasing with the decrease of the core slenderness ratio and for the sleeved Compression Member with core of small slenderness ratio, small gap and small stiffness ratio are preferred to obtain larger ultimate bearing capacity and stiffness.

Jyoti Vasantrao Bhilawe - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study of Eccentrically Loaded Single Angle Compression Member
    Journal of The Institution of Engineers (India): Series A, 2018
    Co-Authors: Jyoti Vasantrao Bhilawe
    Abstract:

    An experimental investigation of the buckling response of single angle Compression Member is presented here. Equal angle was used with a range of maximum principal slenderness ratios to determine elastic and inelastic failure characteristics, including flexural torsional effects. A nonlinear finite element model applicable to steel single angle Compression Members eccentrically loaded through one leg has been developed using an existing finite element package. A finite element study was conducted to investigate the strength and behavior of angle Compression Member. The finite element analysis was performed for angle as per experimental investigation. The results obtained by this study, emphasize the importance of the flexural–torsional buckling mode, especially in the inelastic range of behavior for angle.

  • Study of Equal Angle Subjected to Compression for Bolted end Connection
    Journal of The Institution of Engineers (India): Series A, 2018
    Co-Authors: Jyoti Vasantrao Bhilawe
    Abstract:

    The work presents the results of an experimental and analytical investigation of the buckling response of single angle and double angle closely spaced back to back for bolted connection. Equal angle was used with a range of maximum principal slenderness ratios to determine elastic and inelastic failure characteristics, including flexural torsional effects. A nonlinear finite element model applicable to steel single angle Compression Members eccentrically loaded through one leg has been developed using an existing finite element package. A finite element study was conducted to investigate the strength and behaviour of angle Compression Member. The finite element analysis was performed for angle as per experimental investigation. The results obtained by this study, emphasize the importance of the flexural–torsional buckling mode, especially in the inelastic range of behaviour for angle.

Sanjay Tiwari - One of the best experts on this subject based on the ideXlab platform.

  • An Analytical review of Change in Steel Reinforcement of Columns for Building Frame with Infill walls and without Infill Walls .
    International Journal of Research, 2016
    Co-Authors: Upendra Singh Rajawat, Sanjay Tiwari
    Abstract:

    In concrete frames, masonry walls are generally provided as infills .These infills are considered as non structural Members. In structural calculations, only mass of these infill walls is considered in load calculations. Structural properties such as strength and stiffness are generally neglected. It was observed that the performance of structures containing infill walls was better during earthquake as compared to those without infill walls. Behavior of infill is like a Compression Member between columns and beams. Compression forces are transferred from one node to another node. Infill walls resist lateral forces. Capacity of resisting lateral forces can be slightly reduced due to openings in the wall. Moment resisting capacity of the frame is appreciably affected because of infill walls. They play significant role to enhance the lateral stiffness of whole frame. Lateral deflection is significantly lowered in the case of infilled frame as compared to the frame without infill walls. In the current topic under study, we have focused on the change in column moments and thereby change in steel requirement in columns due to infill walls.