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Important Points to Remember for Eccentric Footing, Cantilever Footing or Shoe Footing

July 30, 2017

Some days ago I have posted a Picture of an eccentric isolated foundation and I asked my fans on facebook that whether it is right to place an isolated column foundation like this or not? As a result I have got some very useful and insightful comments of my fans which i though I must share with you on the subject of eccentric footing, cantilever footing or shoe footing. After seeing this picture…

how should the guided bearings in piers of the curved region be oriented with respect to the fixed bearing in abutment?

May 27, 2016

To determine the orientation of guided bearings, one should understand the movement of curved region of a prestressed bridge. Movement of prestress and creep are tangential to the curvature of the bridge (or along longitudinal axis) while the movement due to temperature and…

What are the advantages of piers constructed monolithically with the bridge deck over usage of bearings?

May 27, 2016

Basically, piers constructed monolithically with the bridge deck are advantageous in the following ways:(i) Movement of the bridge deck is achieved by the bending deformation of long and slender piers. In this way, it saves the construction cost of bearings by using…

Are diaphragms necessary in the design of concrete box girder bridges?

May 27, 2016

Diaphragms are adopted in concrete box girder bridges to transfer loads from bridge decks to bearings. Since the depth of diaphragms normally exceeds the width by two times, they are usually designed as deep beams. However, diaphragms may not be necessary in case bridge bearings are placed directly under the webs because loads in bridge decks can be directly transferred to the bearings based on…

What is the advantage of sliding bearings over roller bearings?

May 27, 2016

In roller bearing for a given movement the roller bearing exhibit a change in pressure centre from its original position by one-half of its movement based on David J. Lee. However, with sliding bearing a sliding plate is attached to the upper superstructure and the moving…

Why is the span length ratio of end span/approach span to its neighboring inner spans usually about 0.75?

May 27, 2016

From aesthetic point of view, an odd number of spans with a decrease in length in the direction of abutment is desirable. Moreover, spans of equal length are found to be boring. However, the arrangement of irregular span lengths is not recommended because it gives a feeling…

In the design of a simply supported skew bridge, which direction of reinforcement should be provided?

May 27, 2016

In the conventional design of steel reinforcement for a simply supported skew bridge, a set of reinforcement is usually placed parallel to free edge while the other set is designed parallel to the fixed edge. However, this kind of arrangement is not the most efficient way of placing the reinforcement. The reason is that in some parts of the bridge, the moment of resistance is provided by an obtuse…

What are the functions of different components of a typical expansion joint?

February 29, 2016

We all know that concrete is vulnerable to temperature changes it usually shrinks and expands due to some temperature variations, in such a condition most of the times a crack is intentionally introduced so that any expansion or shrinkage in a panel would not produce…

Under what situation shall engineers use jacking at one end only and from both ends in prestressing work?

February 23, 2016

Prestressing is now a must-to-have phenomenon in every mega project whether it includes flyovers or dam or whatever. During the design procedures a very important question that arises in the mind of the engineer is; whether to use jacking at one end only or from both…

Treatment of dampness in walls in many ways

November 23, 2014

Dampness is the cause, reason and initiator of many defects and diseases in all sorts of construction from roads and transport systems to building and housing facilities. It might be a headache for you in rainy season and it might not let you sleep easily because of the danger and consequences of its presence. This post will let you know how to treat if your walls or building is being effected by…

Pile Cut off Level – Pile Chipping – Reasons & Procedure (WITH PICTURES)

October 29, 2014

As per the definition, the pile cut off level is the elevation up to which the concrete of the pile head is chipped or cut off while exposing rebar. It is an important design parameter in case of pile foundation that allows the rebar of pile to embed in pile cap and…

Unable to Connect to Database Connection, Would you like to configure the database connection now? Primavera P6 [SOLVED]

October 17, 2014

During the Primavera running process or mostly due to computer crash due to power supply failure or any similar issue you got an error in Primavera P6 regarding connection to database PMDB, Reason PMDB is Project Management Database that is connected via Microsoft SQL…

Practical Civil Engineering Works Questions and Answers by Vincent T.H. CHU

September 12, 2014

Working in the field as a civil engineer is sometimes very challenging. The diversity in the conditions and nature of job from project to project varies. The extent of variation is such that even if you belongs to one major category like transportation engineering your every single project will have hundreds of unique happenings and hundreds of unique challenges. @import…

Comparison of ETABS with SAP, Which is better?

July 4, 2014

Question: Which software is mostly used ETABS or SAP, which software should be learn first? >>> Download ETABS full Cracked version here Answer: ETABS is purely building software , you can design any type of building in etabs but you cannot design Retaining…

Retaining Walls, the support soil needs to stand up

February 1, 2014

We know that soil or any other loose granular material has a safe angle of repose at which the soil or material can withstand without any requirement of confinement or support. But due to practical and property restrictions we in some cases need to cut or fill the soil at…

Things you should know about rutting

January 27, 2014

A very common premature pavement failure in most countries is seen as a surface depression in the wheel path. The depression which is formed is called a rut and along the rut uplift occurs due to shearing. Ruts are particularly evident after a rain when they are filled with water. Rutting may occur only in the pavement surface and the sub grade may be intact and rutting may also be exhibited by…