Hydraulic performance of temporary construction traffic barriers

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Title: Hydraulic performance of temporary construction traffic barriers
Author: Hudson, Cody Brent
Abstract: Temporary Concrete Traffic Barriers (TCTBs ) are essential in order to protect the traveling public and highway construction crews from accidents due to driver misfortune or negligence . In order for TCTBs to be installed , however , they must be successfully crash tested . Barrier height and drainage open space are key characteristics that influence this crash test rating . This is because an increase in height will insure that a vehicle will not over -top the barrier and a decrease in drainage open space will result in greater barrier mass , which will in turn resist larger impact forces . The factors that increase the crash worthiness of a barrier , however , lead to poor hydraulic performance . This then becomes a concern if barriers are placed in areas where they may adversely impact the local floodplain elevation . The objective of this research is the development of a hydraulic rating curve that describes the relationship between upstream energy head and the flow rate passing the barrier . To accomplish this objective , a three parameter model with three unknown coefficient terms was utilized . The model was then fit to experimentally obtained data , and a rating curve was developed . In addition , the effects of downstream submergence and clogging of the drainage opening , with respect to the rating curve , was also analyzed . Finally , a method for using this information in the hydraulic modeling software HEC -RAS was developed .
URI: http : / /hdl .handle .net /2152 /ETD -UT -2010 -05 -1076
Date: 2010-10-26

Citation

Hydraulic performance of temporary construction traffic barriers. Master's thesis, University of Texas at Austin. Available electronically from http : / /hdl .handle .net /2152 /ETD -UT -2010 -05 -1076 .

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