Incremental launching mode of bridge construction, Civil Engineering

Assignment Help:

In incremental launching mode of bridge construction, what are ways adopted to increase sufficient resistance of superstructure during launching practice?


Related Discussions:- Incremental launching mode of bridge construction

Define latitude - transportation, Define Latitude - Transportation Lati...

Define Latitude - Transportation Latitude of a line is the distance that the line extends in a north or south direction. A line that runs towards north has positive latitude; a

Design concrete structures and foundatri, What you need to do in my assignm...

What you need to do in my assignment only for the calculation part for project Task CalculateSG A: Ground Level, SG B: First Level, SG C: Second > Level, SG D: Third Level, and Su

Building technology 1, what are the defects in timber due to natural forces...

what are the defects in timber due to natural forces?

Radial flow pumps for small flows and high heads, Radial flow pumps for sma...

Radial flow pumps for small flows and high heads In radial flow pumps, a diffuser/volute is generally designed at it outlet to convert the kinetic energy obtained during the pu

Hiley formula in designing of h-piles, Question Is it resourceful that ...

Question Is it resourceful that engineers rely solely on Hiley's formula in designing of H-piles? Answer About 90 percent of H-piles accept Hiley's formula for desig

Advantages and dis advantages of timber, WHAT ARE THE ADVANTAGES AND DISADV...

WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF TIMBER FOR CIVIL ENGINEERING

Function of a separation membrane amid concrete pavement, Question What...

Question What is main function of a separation membrane amid concrete pavement slab and sub-base ? Answer Division membrane between concrete pavement slab and sub-bas

Explain about overhauling of level xing, Q. Explain about Overhauling of Le...

Q. Explain about Overhauling of Level xing? Each level crossing except those laid with PSC sleepers must be opened out and the condition of sleepers and fittings, rails and fas

Total station - uses and mining, Total station - uses and mining: Use...

Total station - uses and mining: Uses:- Total stations are mainly used by land surveyors and Civil Engineers, either to record features as in Topographic Surveying or to

State the term - failure due to strain, State the term - Failure Due to Str...

State the term - Failure Due to Strain In most of  the cases of pre-stressed concrete construction, the failure of underreinforced and lightly reinforced members shall take pla

12/5/2013 6:30:27 AM

For a period of launching process leading edge of superstructure is subject to large hogging moment. In this relation, steel launching nose typically about 0.6-0.65 times span length is provided at leading edge to decrease cantilever moment. Occasionally, instead of using launching nose a tower and stay system are designed that serves same purpose


The superstructure continually experiences another sagging and hogging moments in incremental launching. Usually central pre stress is provided in which compressive stress at all points of bridge cross section is equal. In this method, it caters for a possible occurrence of tensile stresses in upper and lower part of cross section when subject to hogging and sagging moment in that order. When whole superstructure is completely started on, continuity pre stressing is performed in which location and design of continuity tendons are based on a bending moments in final completed bridge condition and its provision is supplementary to central pre stress. For very lengthy span bridge, temporary piers are provided to bind the cantilever moment.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd