Length is constructed in first phase of construction, Civil Engineering

Assignment Help:

In construction of a two-span bridge (span length = L) by using span-by-span construction, why is the length of about 1.25L bridge segment is constructed in first phase of construction?


Related Discussions:- Length is constructed in first phase of construction

Define the thiem equations for confined aquifers, Define the Thiem Equation...

Define the Thiem Equations for Confined Aquifers   Using natural log:  Q = 2pKm(h 2 - h 1 )/ln(r 2 /r 1 )   Using log 10 :    Q = 2Km(h 2 - h 1 )/((1055)log(r 2 /r 1 ))

Determine the governing effective length of a steel column, Determine the g...

Determine the governing effective length of a steel column? Determine the governing effective length of a W12 x 106 steel column that is 12' high, pinned at each end, and

Major functions of features observed in a typical manhole, Question Wha...

Question What are the major functions of following features observed in a typical manhole ? Answer (i) Groove near benching, (ii) R.S.J. (iii) double seal manhole cove

Explain the typical wastewater characteristics, Explain the Typical Wastewa...

Explain the Typical Wastewater Characteristics? Total Suspended Solids = 100 - 350 mg/L (200 mg/l is the typical value)    BOD 5 = 100-300 mg/L (200 mg/L is the typical val

Arrangement of piles in a pile cap to reduce bending moment, Arrangement of...

Arrangement of piles in a pile cap to reduce bending moment induced in piles Let's consider that piles are designed to intersect at a single common point in a pile cap. The re

Why do we need to control air pollution, Why do we need to control air poll...

Why do we need to control air pollution? a. It causes harmful effects on human health,  Materials and property,  Plants and Animals, Visibility, Global climate and others b.

Water curing, what will happen if the water curing is in of and on

what will happen if the water curing is in of and on

Estimate prestress losses, Given: beam deminsions: flange width=22" FL...

Given: beam deminsions: flange width=22" FLANGE THICKNESS=7" WEB WIDTH=7" SECTION HEIGHT=40" f'c=5000psi f'ci=3500psi fpu=270ksi Ap=eighteen 1/2" diam strands superim

Levelling, the cooke''s reversible level

the cooke''s reversible level

12/5/2013 6:44:00 AM

Mostly, there are primarily three reasons for this arrangement-
(i) Permanent structure is statically indeterminate structure. all through construction by using span-by-span construction, if first stage of construction contains of first span length L only, then a sagging moment in mid span of partially completed bridge is big than that of completed two-span permanent structure.
To pass up such occurrence, 0.25L of bridge segment is extended further from second pier which offers a counteracting moment, thereby reducing mid-span moment of partially completed bridge.
(ii) The place of 1.25 L countering from first pier is approximate location of point of contra flexure, imagine that two-span Bridge is uniformly loaded in which bridge moment about zero in an event of future is loaded bridge.
Therefore, designing of construction joint in this particular location has least adverse effect on structural performance of a bridge.
(iii) In case of a pre stressed bridge, pre stressing work has to be carried out after construction of first segment of bridge. If pre stressing work is performed at first pier which is heavily reinforced with reinforcement, it is adverse when compared with pre stressing location at 1.25L from first pier everywhere there is relatively new space to accommodate pre stressing works.

12/5/2013 6:45:29 AM

Mostly, there are primarily three reasons for this arrangement-
(i) Permanent structure is statically indeterminate structure. all through construction by using span-by-span construction, if first stage of construction contains of first span length L only, then a sagging moment in mid span of partially completed bridge is big than that of completed two-span permanent structure.
To pass up such occurrence, 0.25L of bridge segment is extended further from second pier which offers a counteracting moment, thereby reducing mid-span moment of partially completed bridge.
(ii) The place of 1.25 L countering from first pier is approximate location of point of contra flexure, imagine that two-span Bridge is uniformly loaded in which bridge moment about zero in an event of future is loaded bridge.
Therefore, designing of construction joint in this particular location has least adverse effect on structural performance of a bridge.
(iii) In case of a pre stressed bridge, pre stressing work has to be carried out after construction of first segment of bridge. If pre stressing work is performed at first pier which is heavily reinforced with reinforcement, it is adverse when compared with pre stressing location at 1.25L from first pier everywhere there is relatively new space to accommodate pre stressing works.

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