Hencky bar-chain model for optimal circular arches against buckling

Simulation of Reinforcing Bar Buckling in Circular Reinforced Concrete Columns

ACI Structural Journal, V. 110, No. 4, July-August 2013. MS No. S-2011-235.R2 received February 1, 2012, and reviewed under Institute publication policies. Copyright © 2013, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. Pertinent discussion including author’s closure, if any, will be published in th...

On the Optimal Design of Columns against Buckling

We establish existence, derive necessary conditions, and construct and test an algorithm for the maximization of a column’s Euler buckling load under a variety of boundary conditions over a general class of admissible designs. We prove that symmetric clamped–clamped columns possess a positive first eigenfunction and introduce a symmetric rearrangement that does not decrease the column’s bucklin...

The Buckling of a Prestressed Circular Plate*

Nonlinear Buckling and Post-buckling of Shape Memory Alloy Shallow Arches

In this work, the nonlinear buckling and post-buckling behavior of shallow arches made of Shape Memory Alloy (SMA) is investigated. Arches are susceptible to large deflections, due to their slenderness, especially when the external load exceeds the serviceability limit point. Beyond this, loss of stability may occur, the famous snap-through buckling. For this reason, curved beams can be used in...

Using System Dynamics to Model Rod Bar Supply Chain in Iranian Market

  Steel market and particularly rod bar market play important roles in economy of countries. Economic systems are considered as complex systems which are sophisticated to be modeled mathematically. One way to model these systems is simulation and use of system dynamics. This paper models rod bar supply chain in Iran using system dynamics. Data of this research is gathered from first hand materi...