The Structural Engineer's Corner

Eng. Onorio Francesco Salvatore

Archive for the 'Steel structures' Category

Methods of Structural Analysis according to AS 4100 – Part 3: Braced frame vs Sway frame in the moment amplification method for elastic analysis


In the previous post, we discussed about the Elastic analysis at first-order with moment amplification. We have seen how this method can be a good alternative to a second-order analysis. Basically, we need to increase the moment by a certain quantity including in this way the second-order effects. We have also introduced the moment amplification […]

Read the rest of this entry »

Methods of Structural Analysis according to AS 4100 – Part 2: Elastic Analysis


In the Australian Standard 4100, the second-order effects for elastic analysis are defined in the Clause 4.4.1.2. It is stated that the analysis shall allow for the effects of the design loads acting on the structure and its members in their displaced and deformed configuration. Second-order bending moments caused by the member axial forces and […]

Read the rest of this entry »

Methods of Structural Analysis according to AS 4100 – Part 1: General


This post provides guidance on calculating design action effects as required by AS 4100. The methods of analysis recognized by AS 4100 are: (a) first-order elastic analysis with moment amplification (Clause 4.4.2 of AS 4100) (b) second-order elastic analysis (Appendix E of AS 4100) (c) plastic analysis with moment amplification (Clause 4.5 of AS 4100), and (d) advanced analysis (Appendix […]

Read the rest of this entry »

The Form Factor for local buckling as per Australian Standard 4100


The form factor (kf) is defined in Clause 6.2.2 of AS 4100. Kf is used to determine the design section capacity of a concentrically loaded compression member (φNs). The calculation of kf

Read the rest of this entry »

Preliminary Design of Connections according to Steenhuis


EN 1993-1-8 gives the first rules for determining the behavior of major axis, beam-to-column steel moment connection. In this article we will see another useful method for a preliminary design.  Our reference will be Steenhuis. The estimation of stiffness and resistance of the joint is based on the weakest component. The stiffness may be estimated […]

Read the rest of this entry »

Connessioni nelle strutture in acciaio: i tanti pregi delle unioni saldate


In una costruzione di acciaio gli elementi lineari (travi, colonne) vengono prodotti in determinate lunghezze a causa dei limiti imposti dalla produzione e dal trasporto. Le connessioni sono dunque necessarie per garantire continuità tra le varie parti. Uno dei metodi più efficienti per garantire la connessione delle strutture di acciaio è la saldatura. La saldatura […]

Read the rest of this entry »