Shinkansen Br. (fatigue cracks at main girder - floorbeam connection)
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開始行:
*Shinkansen Br. (fatigue cracks at main girder - floorbeam connection) [#ud8a2263]
*新幹線の橋梁（主桁と横桁連結部の疲労き裂）[#ud8a2263]
**1.Field of application [#g9bb11ab]
>
Steel bridge on Shinkansen-railway, Japan
<
>新幹線の鋼橋
**2.Circumstances of repair [#v7db577b]
>
Fatigue cracks at maingirder - floorbeam connection were found in 1974(after 10 years service).
<
>供用開始から10年が経過した1974年、主桁と横桁の連結部に疲労き裂が見つかった。
**3.Types of structure [#b4e6eb4a]
>
One through type girders[[(Fig.1)>#fig1]]
<
>下路式の鈑桁橋[[(図.1)>#fig1]]
CENTER:&aname(fig1);&attachref(Shinkansen_MF_fig1.gif);&br;
CENTER:Fig.1&br;
CENTER:図.1 疲労き裂の位置&br;
**4.Details of loading [#r8fbddf6]
<
Fluctuating loads due to Shinkansen trains traffic.
>
>新幹線荷重
**5.Description of damage and repair method applied [#l1d68d97]
>再溶接と当て板補強（高力ボルト固定）を行った。
CENTER:&attachref(Shinka5.gif);&br;
CENTER:&attachref(Shinka1.gif);&br;
CENTER:&attachref(Shinka2.gif);&br;
CENTER:&attachref(Shinkansen_MF_fig5.gif);&br;
CENTER:&attachref(Shinka3.gif);&br;
&br;
CENTER:&attachref(Shinka4.gif);&br;
終了行:
*Shinkansen Br. (fatigue cracks at main girder - floorbeam connection) [#ud8a2263]
*新幹線の橋梁（主桁と横桁連結部の疲労き裂）[#ud8a2263]
**1.Field of application [#g9bb11ab]
>
Steel bridge on Shinkansen-railway, Japan
<
>新幹線の鋼橋
**2.Circumstances of repair [#v7db577b]
>
Fatigue cracks at maingirder - floorbeam connection were found in 1974(after 10 years service).
<
>供用開始から10年が経過した1974年、主桁と横桁の連結部に疲労き裂が見つかった。
**3.Types of structure [#b4e6eb4a]
>
One through type girders[[(Fig.1)>#fig1]]
<
>下路式の鈑桁橋[[(図.1)>#fig1]]
CENTER:&aname(fig1);&attachref(Shinkansen_MF_fig1.gif);&br;
CENTER:Fig.1&br;
CENTER:図.1 疲労き裂の位置&br;
**4.Details of loading [#r8fbddf6]
<
Fluctuating loads due to Shinkansen trains traffic.
>
>新幹線荷重
**5.Description of damage and repair method applied [#l1d68d97]
>再溶接と当て板補強（高力ボルト固定）を行った。
CENTER:&attachref(Shinka5.gif);&br;
CENTER:&attachref(Shinka1.gif);&br;
CENTER:&attachref(Shinka2.gif);&br;
CENTER:&attachref(Shinkansen_MF_fig5.gif);&br;
CENTER:&attachref(Shinka3.gif);&br;
&br;
CENTER:&attachref(Shinka4.gif);&br;
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