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Analysis of Concrete Slabs on Grade Spreadsheet

Analysis of concrete slabs on grade is a spreadsheet program written in MS-Excel for the purpose of analysis of concrete slabs on grade. Specifically, a concrete slab on grade may be subjected to concentrated post or wheel loading.

Then for the given parameters, the slab flexural, bearing, and shear stresses are checked, the estimated crack width is determined, the minimum required distribution reinforcing is determined, and the bearing stress on the dowels at construction joints is checked. Also, design charts from the Portland Cement Association (PCA) are included to provide an additional method for determining/checking required slab thickness for flexure. The ability to analyze the capacity of a slab on grade subjected to continuous wall (line-type) load as well as stationary, uniformly distributed live loads is also provided. Loading data for fork trucks and AASHTO trucks is included.

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Arch Bridge Analysis using Finite Element Method

Arch bridges have been built from the time of the Romans onwards. There are approximately 75,000 masonry arch bridges in service on road, railway and waterway networks in the United Kingdom with the majority of these bridges built between the 17th and 19th centuries.

The assessment of old masonry arch bridges is not a simple matter as such bridges have been serving the traffic over centuries and the material may be deteriorated and weathered to a certain extent. These bridges are now carrying weights far beyond those envisaged by their builders. Since January 1999, under new European Commission Directives, the maximum allowable gross vehicle weight has been increased from 38t to 44t and simultaneously the maximum axle load increased from IOt to 11. St. Figure 1.1 shows the increase in the maximum allowable single axle load from 1967 to 1999. The increases in traffic load have compelled both local and national highway authorities to undertake assessment and strengthening of their stocks of masonry arch bridges. Abnormally large heavy loads also require special one-off assessments typical of which was the 240t oil rig leg seen in Figure 1.2 crossing Balmoor bridge, Inverugie in 1991.

Finite element analysis became famous in the last few decades mainly due to the development of powerful computers. The advantage of this method over other conventional structural analyses is that it can be used for statically indeterminate structures with irregular shapes and different boundary conditions. Non-linear material properties can also be defined giving non-linear structural behaviour up to ultimate limit state.

The concrete post-tensioned structural design is actually sections design, no matter box girder, circular column, or other sections. There are three kind of forces on each section: 1. External loads, w only without PT, section forces. The External loads can be ASD level for serviceability design, or SD level for ultimate strength design. 2. Primary equivalent loads, PT section forces. The tendon is mentally removed and replaced with all of the loads it exerts on the structure. 3. Secondary section forces from all reactions of primary PT , on free-body structure.

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Eric Wing – Autodesk Revit Architecture 2016 No Experience Required – 2015

Year: 2015
Author: Eric Wing
Publisher: Sybex
ISBN: 978-1-119-05953-0
Series: Autodesk Revit
Language English
Format: PDF
Quality: initially computer eBook
Interactive contents: Yes
Number of pages: 864

Go from beginner to guru quickly with the ultimate Revit Architecture 2016 guide
Autodesk Revit Architecture 2016 No Experience Required is your ultimate hands-on guide for mastering this essential BIM software. With step-by-step instruction and a continuous tutorial approach, this invaluable guide walks you through the design of a four-story office building. You’ll be led through the entire design, documentation, and presentation process with expert instruction and helpful tips, so you can quickly become confident and productive. You’ll follow a real-world workflow as you jump right into modeling, first placing doors and windows, then building floors layer-by-layer, adding roofs and ceilings, stairs, ramps, and railings.

Coverage includes crucial information on detailing, view and match line information, and printing, plus advanced topics like curtain walls, sweeps, embedded families, and formulas. You’ll delve into site considerations including grading and topsurface features, and integrate them into your design at the rendering stage. The companion website provides downloadable tutorial files so you can jump in at any point and compare your work to the pros.

Revit is the industry-leading Building Information Management software, hailed for its power and sophistication. This guide helps you get the most out of the software, with expert instruction and plenty of practice.

Master the interface, tools, views, and editing capabilities
Work with structural objects, text, dimensions, and multi-story buildings
Generate construction documentation, schedules, and material takeoffs
Explore phase management, work sharing, and working with various formats
BIM is the emerging paradigm for architects and others in the construction and engineering fields. Revit is the industry leader, and is quickly becoming a mandatory skillset. Autodesk Revit Architecture 2016 No Experience Required provides everything you need to get up to speed and down to work

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Staircase Analysis and Design Spreadsheet

Staircases provide means of movement from one floor to another in a structure. Staircases
consist of a number of steps with landings at suitable intervals to provide comfort and safety
for the users.

Types of Stairs
For purpose of design, stairs are classified into two types; transversely, and longitudinally
supported.
a- Transversely supported (transverse to the direction of movement):
Transversely supported stairs include:
§ Simply supported steps supported by two walls or beams or a combination of both.
§ Steps cantilevering from a wall or a beam.
§ Stairs cantilevering from a central spine beam.
b- Longitudinally supported (in the direction of movement):
These stairs span between supports at the top and bottom of a flight and unsupported at the
sides. Longitudinally supported stairs may be supported in any of the following manners:
a. Beams or walls at the outside edges of the landings.
b. Internal beams at the ends of the flight in addition to beams or walls at the outside edges of
the landings.
c. Landings which are supported by beams or walls running in the longitudinal direction.
d. A combination of (a) or (b), and (c).

e. Stairs with quarter landings associated with open-well stairs.

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Shear Strengthening of T-beam with FRP

The rehabilitation of existing reinforced concrete (RC) bridges and building becomes necessary due to ageing, corrosion of steel reinforcement, defects in construction/design, demand in the increased service loads, and damage in case of seismic events and improvement in the design guidelines. Fiber-reinforced polymers (FRP) have emerged as promising material for rehabilitation of existing reinforced concrete structures. The rehabilitation of structures can be in the form of strengthening, repairing or retrofitting for seismic deficiencies. RC T-section is the most common shape of beams and girders in buildings and bridges. Shear failure of RC T-beams is identified as the most disastrous failure mode as it does not give any advance warning before failure. The shear strengthening of RC T-beams using externally bonded (EB) FRP composites has become a popular structural strengthening technique, due to the well-known advantages of FRP composites such as their high strength-to-weight ratio and excellent corrosion resistance.

A few studies on shear strengthening of RC T-beams using externally bonded FRP sheets have been carried out but still the shear performance of FRP strengthened beams has not been fully understood. The present study therefore explores the prospect of strengthening structurally deficient T-beams by using an externally bonded fiber reinforced polymer (FRP).
This study assimilates the experimental works of glass fiber reinforced polymer (GFRP) retrofitted RC T-beams under symmetrical four-point static loading system. The thirteen number of beams were of the following configurations, (i) one number of beam was considered as the control beam, (ii) seven number of the beams were strengthened with different configurations and orientations of GFRP sheets, (iii) three number of the beams strengthened by GFRP with steel bolt-plate, and (iv) two number of beams with web openings strengthened by U-wrap in the shear zone of the beams.

The first beam, designated as control beam failed in shear. The failures of strengthened beams are initiated with the debonding failure of FRP sheets followed by brittle shear failure. However, the shear capacity of these beams has increased as compared to the control beam which can be further improved if the debonding failure is prevented. An innovative method of anchorage technique has been used to prevent these premature failures, which as a result ensure full utilization of the strength of FRP. A theoretical study has also been carried out to support few of the experimental findings.

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Two Way Slab Design Spreadsheets to Eurocode 2

Two-way spanning slabs For rectangular slabs with standard edge conditions and subject to uniformly distributed loads, normally the bending moments are obtained using tabulated coefficients. Suchcoefficients are provided later in this section.

Main reinforcement for two way slabs designs in both directions.
This situation happen when slab were supported at all four span sides and
ratio long per short span less or equivalent to two. Bending moment and shear
force for two way slab depends on ratio ly / lx and extension between his slab
and supporter whether easily supported or constrained.Two way simply supported slab
have a panel and easily supported in edge and panel can lift upward when moment acting on
it, slab is supported by beam steel or extension between slab and non monolithic beam.

Moment only exist in center part of span.

Two way slab constrained have more than one panel or in section slab edge can be prevent from lifted. This situation happen when slab connected by monolithic with the supporter or slab panel connected by monolithic between one and another and moment acting at slab edge. This type of slab has four moment value at one slab panel namely two moment amid span and two moment at direction x and y.

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Vidéos de formation PISTE 5

L’ensemble des vidéos de ce post constituent une formation solide pour des débutant sur le logiciel PISTE 5 avec un rappel des normes de conception françaises. Formation préparée par Dr Ahmed Ksentini.

01 – Formation PISTE – Normes de conception et introduction

02 – Formation PISTE – Choix de l’axe sur autocad

03 – Formation PISTE – Introduction de l’axe sous le module dap de piste

04 – Formation PISTE – Traitement du terrain naturel

05 – Formation PISTE – Choix de la ligne rouge ou profil en long projet

06 – Formation PISTE – Le profil en travers type

07 – Formation PISTE – Récapitulatif des fichier créés et lecture avancée

08 – Formation PISTE 5 – Le calcul du dévers

09 – Formation PISTE – Les éditions

10 – Formation PISTE – Les plans

11 – Formation PISTE – Notions sur la récupération de la chaussée

Mensura Genius Tutoriel

Ce tutoriel est un ensemble de videos portant sur les différents modules du logiciel Mensura.

Mensura Genius Tutoriel – Partie 1

Mensura Genius Tutoriel – Partie 2

Mensura Genius Tutoriel – Partie 3

Mensura Genius Tutoriel – Partie 4

Mensura Genius Tutoriel – Partie 5

Wind Analysis for Trussed Tower Based on ASCE 7-16

Wind analysis for trussed tower sheet examines structural forces present in a four-sided truss tower modeled as a support system for a wind turbine. Case I examined only forces due to the weight of the nacelle and rotor, while Case II also incorporated lateral wind force. All forces were idealized as concentrated forces and theoretic analysis was completed using static equilibrium concepts and truss/frame analysis techniques. A PASCO Structure kit was used to construct a model and validate theoretical findings. Weights were applied to the model and the resulting axial forces were measured using load cells. Experimental data concurred with the theoretical analysis within the measured uncertainty, indicating the tower was accurately analyzed as a frame/truss structure.
Main Wind Force Resisting System
• Elements of the structure which are essential to keeping
the entire structure from collapsing due to wind.
Components and Cladding
• Elements (Structural or Non-Structural) which transmit
wind forces to the Main Wind Force Resisting System.
• Not essential for overall structural stability

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Concrete Creep, Shrinkage Factors and Tensile Strength Calculation

This spreadsheet provides values of creep factors, concrete tensile strengths and free shrinkage strains for use with finite element slab design programs that take account of concrete cracking (non-linear analysis). The methods used are those recommended in Concrete Society Technical Report No TR58. With programs that do not account for cracking, substantially higher creep factors should be employed, to allow for the increased displacements caused by cracking and shrinkage.If each stage is analysed with its’ own φ factor and fctm, then ζ and fctm for the critical load case should be used at subsequent stages. If the calculation method employed does not do this, say NO at cell J14. For slabs with nominal or low restraint use fctmfl, and for severe restraint use fctm. An intermediate value may be used.