Maslenica Bridge (A1)

{{Infobox Bridge

|bridge_name=Maslenica Bridge

|image=Old Maslenica bridge2.jpg

|caption=

|official_name=Most Maslenica

|carries=A1 motorway

|crosses=Maslenica Strait (Adriatic Sea)

|locale=Southern Croatia

|maint=Croatian Motorways Ltd

|id=

|design=concrete arch bridge

|mainspan=200 m

|length=377.6 m

|width=20.4 m

|clearance=

|below=65 m

|traffic=

|open=1997

|closed=

|toll=charged as a part of A1 motorway toll

|map_cue=

|map_image=

|map_text=

|map_width=

|coordinates= {{coord|44|14|12|N|15|31|20|E|region:HR_type:landmark|display=inline,title}}

}}

Maslenica Bridge ({{langx|hr|Most Maslenica}},{{cite news | newspaper = Croatian Motorways Ltd | language = Croatian | url = http://www.hac.hr/prezentacija-HR.pdf | title = Zagreb - Split Motorway (pp. 6-7) | date = July 18, 2005 | url-status = dead | archiveurl = https://web.archive.org/web/20051014044129/http://www.hac.hr/prezentacija-HR.pdf | archivedate = October 14, 2005 }} but also known as {{langx|hr|Maslenički most}}) is a {{convert|377.6|m|abbr=on}} long reinforced concrete arch bridge spanning the Novsko Ždrilo strait of the Adriatic Sea, north of Zadar, Croatia, carrying the Croatian A1 motorway. It is located between the Rovanjske and Posedarje interchanges of the A1 motorway.{{cite news | newspaper = Narodne novine | language = Croatian | url = http://narodne-novine.nn.hr/clanci/sluzbeni/305463.html | title = Regulation on motorway markings, chainage, interchange/exit/rest area numbers and names | date = May 6, 2003}}

The bridge comprises a {{convert|200|m|ft|sing=on}} span reinforced concrete arch, with an arch rise of {{convert|65|m|ft}}. The arch comprises a box cross section, a double cell of constant depth. The superstructure is continuous across 12 spans, consisting of prestressed girders made monolithic with the in situ cast deck slab and transverse girders.{{cite news | newspaper = Croatian Motorways Ltd | language = Croatian | url = http://www.hac.hr/brosure/monografija/virtualMagazine.html | title = HAC Monografija | date = May 17, 2010 | url-status = dead | archiveurl = https://web.archive.org/web/20100818140354/http://www.hac.hr/brosure/monografija/virtualMagazine.html | archivedate = August 18, 2010 }}

The bridge is maintained and operated by Croatian Motorways Ltd.

Approximately {{convert|1.5|km|abbr=on}} to the south, there is another bridge, carrying D8 state road across the same strait, and this was the original crossing point over the strait.{{cite news | newspaper = Narodne novine | language = Croatian | url = http://narodne-novine.nn.hr/clanci/sluzbeni/2010_02_17_410.html | title = Decision on categorization of public roads as state roads, county roads and local roads | date = February 17, 2010}} Although that is a completely different structure, carrying a different road, that bridge is also officially called Maslenica Bridge.{{cite news | newspaper = Gradimo.hr | language = Croatian | url = http://www.gradimo.hr/Otvoren-novi-Maslenicki-most/hr-HR/3089.aspx | title = New Maslenica Bridge open | date = June 20, 2005}} The bridge carrying the A1 motorway is actually older than the one carrying the D8 road, however since the latter is a replacement for a bridge destroyed in the Croatian War of Independence in 1991, both A1 and D8 bridges are known to be referred to as both old and new Maslenica Bridge.{{cite news | newspaper = Vjesnik | language = Croatian | url = http://www.vjesnik.hr/Pdf/2002%5C10%5C04%5C07A7.PDF | archive-url = https://web.archive.org/web/20031004193530/http://www.vjesnik.hr/pdf/2002%5c10%5c04%5c07A7.PDF | url-status = dead | archive-date = October 4, 2003 | title = New old bridge against wind and congestion | date = October 4, 2002 }}{{cite news |newspaper=Nacional |language=Croatian |url=http://www.nacional.hr/clanak/13238/povratak-starog-maslenickog-mosta |trans-title=Return of the old Maslenica Bridge |title=Povratak starog Masleničkog mosta |date=2 October 2002 |accessdate=3 July 2012 |author=Milivoj Đilas |archivedate=6 April 2012 |url-status=dead |archiveurl=https://web.archive.org/web/20120406190629/http://www.nacional.hr/clanak/13238/povratak-starog-maslenickog-mosta }}

Construction

File:Old and New Maslenica Bridges.JPG

The bridge was designed by Jure Radić, and built by Konstruktor, Split, between 1993 and 1996, using free cantilevering with temporary cable-stays. The reinforced-concrete arch was executed in {{convert|5|m|abbr=on}} long segments, matching spandrel column spacing. Prefabricated girders required for the structure were executed and prestressed in a purpose built plant on the site. The same plant was subsequently used to produce Jersey barriers used as bridge protective barriers.{{cite news | newspaper = Konstruktor | language = Croatian | url = http://www.konstruktor-split.hr/reference/tabid/905/agentType/View/PropertyID/86/sortBy/cf6/PropertyTypeID/7/Default.aspx | archive-url = https://web.archive.org/web/20110721101113/http://www.konstruktor-split.hr/reference/tabid/905/agentType/View/PropertyID/86/sortBy/cf6/PropertyTypeID/7/Default.aspx | url-status = usurped | archive-date = July 21, 2011 | title = Konstruktor - Maslenica Bridge | date = June 16, 2010}}

The bridge is significant as it is the first motorway reinforced-concrete arch bridge comprising a substantial span executed in Croatia.{{cite news | newspaper = Gradimo | language = Croatian | url = http://www.gradimo.hr/Autocestovni-most-kod-Maslenice/hr-HR/13058.aspx | title = Motorway bridge near Maslenica | date = January 1, 2007}}

On 21 December 1998 the speed of a gust of wind on the Maslenica Bridge was measured at a record speed of 248 kilometres per hour.A. Bajić, B. Peroš, V. Vučetić, Z. Žibrat, Wind load - a meteorological basis for Croatian standards, GRAĐEVINAR 53 (2001), page 501, (in Croatian); http://hrcak.srce.hr/file/18613{{cite journal |last1=Radic |first1=Jure |last2=Savor |first2=Zlatko |last3=Puz |first3=Goran |title=Report: Extreme Wind and Salt Influence on Adriatic Bridges |journal=Structural Engineering International |date=23 March 2018 |volume=13 |issue=4 |pages=242–245 |doi=10.2749/101686603777964487}}

Subsequently wind protection structures have been executed along the motorway section comprising the Maslenica Bridge, since the {{convert|15|km|abbr=on}} long section was completely closed to traffic due to strong wind from time to time - for a total of 6 days and 19 hours in 2007, and 13 days and 2 hours in 2006.{{cite news | newspaper = Jutarnji list | language = Croatian | url = http://www.jutarnji.hr/maslenicki-most-dobit-ce-burobrane/240580/ | title = Maslenica Bridge gets wind protection | date = January 29, 2008 | access-date = June 16, 2010 | archive-url = https://web.archive.org/web/20100223221939/http://www.jutarnji.hr/maslenicki-most-dobit-ce-burobrane/240580/ | archive-date = February 23, 2010 | url-status = dead | df = mdy-all }}{{cite journal |last1=Sesar |first1=Petar |last2=Krecak |first2=Ana |title=Impact of wind on Croatian highways and bridges |journal=IABSE Symposium Report |date=1 January 2005 |volume=90 |issue=11 |pages=23–29 |doi=10.2749/222137805796270469}}

Traffic volume

Traffic is regularly counted and reported by Hrvatske autoceste, operator of the bridge and the A1 motorway where the bridge is located, and published by Hrvatske ceste.{{cite news|newspaper=Hrvatske Ceste |url=http://www.hrvatske-ceste.hr/WEB%20-%20Legislativa/brojenje-prometa/CroDig2009.pdf |title=Traffic counting on the roadways of Croatia in 2009 - digest |date=May 1, 2010 |url-status=dead |archiveurl=https://web.archive.org/web/20110721100545/http://www.hrvatske-ceste.hr/WEB%20-%20Legislativa/brojenje-prometa/CroDig2009.pdf |archivedate=July 21, 2011 }} Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the bridge carries substantial tourist traffic to the Dalmatian Adriatic resorts. The traffic count is performed using analysis of motorway toll ticket sales.

class="wikitable"
colspan=5 style="background:#f2f2f2;" align=center style=margin-top:15 | Maslenica Bridge traffic volume
align=center style="background:#f2f2f2;" | Road

| align=center style="background:#f2f2f2;" | Counting site

| align=center style="background:#f2f2f2;" | AADT

| align=center style="background:#f2f2f2;" | ASDT

| align=center style="background:#f2f2f2;" | Notes

25px A1

| 4805 Maslenica south

| align=center | 12,677

| align=center | 32,411

| Between Rovanjske and Posedarje interchanges.

See also

References