DESIGN OF STRUCTURAL CONNECTIONS TO EUROCODE 3 FREQUENTLY ASKED QUESTIONS

The purpose of this publication is to document each of these questions together with their answers. To facilitate easy of use this document is split into the following Chapters:
Chapter 1 - Introduction
Chapter 2 - Bolts
Chapter 3 - Welding
Chapter 4 - Structural Modelling
Chapter 5 - Simple Connections
Chapter 6 - Moment Connections
Chapter 7 - Column Bases
Chapter 8 - Seismic Design
Chapter 9 - Fire Design
Chapter 10 - Hollow Section Connections
Chapter 11 - Cold-Formed Connections
Chapter 12 - Aluminium Connections
Chapter 13 - Good and bad detailing
Each chapter starts with a brief over-view of the method use in prEN1993-1-8. This is followed by the commonly asked questions together with their answers. In due course the information contained within this document will be put on the Internet and will form part of an easily accessible Internet course for the design, fabrication and erection of structural steelwork connections.

Concrete Model Building Subtypes Recommended for Use in Collecting Inventory Data

This study was conducted by the National Institute of Building Sciences’ Building Seismic Safety Council (BSSC). The goal was to develop standardized categories for older concrete buildings that incorporate more detail than those included in the standard set of Federal Emergency Management Agency (FEMA) Concrete Model Building Types – namely, C1-frames, C2-shear walls, C3-concrete frames with masonry infill, and PC2-precast frames. The recommended “subtypes” generally can be identified without extensive engineering evaluation and therefore can document the inventory of older concrete buildings in an effort to better quantify how many structures might require mitigation. The identification of these subtypes also contributes to determination of the highest priority research needed to enable rapid implementation of performance-based seismic design for mitigation.
For initial collection of inventory data, building age, height, and occupancy should be documented. Data on additional attributes that affect risk of high damage levels or collapse would require engineering evaluation and cannot be collected reliably using typical inventory-collection techniques; however, additional attributes that may be important for identifying a high-risk concrete building are discussed.
The primary attribute suggested for initial classification is occupancy and 13 different occupancies are recommended. The structural systems typically, but not exclusively, used for each occupancy are described as are potential seismic deficiencies. Also described are the many variations that can affect the risk levels of each of the FEMA Concrete Model Building Types (C1, C2, C3, and PC2) including strength, stiffness, configuration irregularities, and gravity frame type. These descriptions are organized into Structural Type Families based on the four primary model building types.
Without further understanding of the collapse mechanisms of older concrete buildings, building subtypes that can reliably distinguish seismic risk levels cannot be established

INTERMEDIATE STRUCTURAL ANALYSIS

BS EN 10219 - 1:2006 Cold formed welded structural hollow sections of non-alloy and fine grain steels - Part 1: Technical delivery conditions

This part of this European Standard specifies the technical delivery conditions for cold formed welded structural hollow sections of circular, square or rectangular forms and applies to structural hollow sections formed cold without subsequent heat treatment. Requirements for tolerances, dimensions and sectional properties are contained in EN 10219-2.
NOTE A range of steel grades is specified in this European Standard and the user should select the grade appropriate to the intended use and service conditions. The grades and mechanical properties of the finished hollow sections are compatible with those in EN 10025-2 and EN 10025-3.

This part of EN 10219 specifies tolerances for cold formed welded circular, square and rectangular structural hollow sections, manufactured in wall thicknesses up to 40 mm, in the following size ranges:
Circular: Outside diameters up to 2 500 mm
Square: Outside dimensions up to 500 mm x 500 mm
Rectangular: Outside dimensions up to 500 mm x 300 mm
The formulae for calculating sectional properties of sections manufactured to the dimensional tolerances of this standard, to be used for the purposes of structural design, are given in Annex B. Dimensions and sectional properties for a limited range of sizes are given in Annex C. Technical delivery conditions are specified in EN 10219-1.
NOTE The designation of the sections' major axis (yy) and its minor axis (zz) align with the axis designation used for structural design in the structural Eurocodes.

Reinforced concrete Masonry Construction - Inspector handbook - 6a. Ed.

Mechanical Metallurgy
Publisher: McGraw-Hill | pages: 800 | 1986 | ISBN: 0070168938 | PDF | 10 mb