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趙金鋼，占玉林，趙人達(dá)，邵俊虎

（西南交通大學(xué)土木工程學(xué)院, 成都 610031）

 

［摘要］為探討高速鐵路拱橋?qū)嶓w圓鋼吊桿的抗疲勞性能和承載能力，設(shè)計(jì)并制作了一根短吊桿和一根長吊桿足尺模型，進(jìn)行了200萬次疲勞試驗(yàn)和承載能力試驗(yàn)。參考《鐵路橋梁鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范》(TB 10002.2—2005)和英國規(guī)范BS 5400的有關(guān)規(guī)定，基于Miner疲勞損傷累積原則，得到了吊桿的等效荷載幅值。研究結(jié)果表明：在設(shè)計(jì)疲勞荷載循環(huán)加載200萬次后，吊桿模型桿體和連接細(xì)節(jié)部位未出現(xiàn)疲勞裂紋，應(yīng)力狀態(tài)穩(wěn)定，實(shí)體圓鋼吊桿疲勞性能滿足設(shè)計(jì)要求；疲勞試驗(yàn)后靜力拉伸試驗(yàn)表明，短吊桿和長吊桿疲勞后靜力性能滿足設(shè)計(jì)要求，極限承載力分別為6 180kN和5 610kN。

［關(guān)鍵詞］實(shí)體圓鋼吊桿；疲勞試驗(yàn)；承載能力；高速鐵路橋梁

中圖分類號：U448.25      文獻(xiàn)標(biāo)識碼：A      文章編號：1002-848X(2013)10-0026-05

 

Model test for fatigue behavior and load bearing capacity of solid round steel hanger in high-speed railway bridge

Zhao Jingang, Zhan Yulin, Zhao Renda, Shao Junhu

(School of Civil Engineering, Southwest Jiaotong Universitiy, Chengdu 610031, China)

 

Abstract: In order to investigate the fatigue behavior and load bearing capacity of the solid round steel hanger in high-speed railway arch bridge, the full scale models of a short and a long solid round steel hangers were designed and manufactured. The fatigue test models were firstly subjected to cyclic loads up to 2 million times and then load bearing capacity tests were carried out. According to Miner’s fatigue accumulation damage rule and referring to the Code for design on steel structure of railway bridge (TB 10002.2—2005) and British Code BS 5400, the equivalent load amplitude of the hanger models was determined. The fatigue test results show that no crack occurs in the body and connection structural detail of the short and the long hanger models, the fatigue behavior of the short and the long solid round steel hangers can meet the design requirement. The static tensile test results show that the static behavior of the short and the long solid round steel hangers can meet the design requirement after 2 million times of cycle loading. The ultimate load bearing capacities of the short and long hanger are 6 180kN and 5 610kN respectively.

Keywords: solid round steel hanger; fatigue test; load bearing capacity; high-speed railway bridge

*高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助課題（20090184120033），西南交通大學(xué)科技發(fā)展基金（2009QK04）。

作者簡介：趙金鋼，博士研究生，Email:zhaojingangtumu@163.com。

 

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