第59卷 Study on Shear Ratio of Concrete lining with Corrugated Steel Webs in Large Span Continuous Rigid Frame bridge YE Liuke,, LI Ziqi, WANG Li (1.School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou Gansu 730070, China 2. National and Provincial Joint Engineering Laboratory of Road Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou Gansu 730070, China) Abstract In the design of large span bridge structure, the shear force of the steel web near the top of the pier generally large. When the beam height is large, the corrugated steel web is easily affected by the irregular geometry which leads to the decrease of shear buckling strength. In order to prevent buckling failure of corrugated steel webs the buckling b ed steel we proved by adding g near the top the pier. Taking Xushuigou bridge as the engineering background, the stress states of steel web and concrete lining under the thickness of concrete lining, shear ratio and the action of vertical load were studied by using simplified calculation formula and establishing finite element numerical simulation model of concrete lining with different thickness.The results show that when the thickness of concrete lining is in the range of 20-60 cm, the shear effect of concrete lining is better, and the vertical load has no effect on the shear ratio of corrugated steel web plate and concrete Key words Highway bridge; High pier and large span continuous rigid frame bridge; Corrugated steel web Thickness of concrete lining: Shear ratio Stress state (责任审编郑冰) (上接第5页) Adaptability Analysis of Existing Railway Tracks and bridges to 27 t Axle Load General Freight Train and Its Strengthening Reconstruction countermeasures GU Mu, MA Zhanguo, XU Liangshan, LIU Jiyuan, FU Bingxian, CHEN Feng, Pan Zhen Railway Engineering Research Institute, China Academy of Railway Sciences Group Co. Ltd, Beijing 100081, China) Abstract This paper analyzed the adaptability of the existing railway tracks and bridges to 27 t ax freight trains. It is pointed out that under the condition of main-type configuration and normal structure state, the existing railway can meet the operation requirements of a few 27 t axle load freight trains From the perspective of maintaining the long-term operation safety of 27 t axle load freight trains and reducing the maintenance workload,it is necessary to gradually strengthen and upgrade the track and bridge structures, and treat diseases of roadbed and tunnel structures Before operation, it is necessary to strengthen reconstruction the line infrastructures that affect operation safety. Under normal operation conditions, it is necessary to gradually reconstruct the railway infrastructures with reduced fatigue lway: 27 t axle load general freight train; Infrastructure; Adaptability: Strengthening reconstruction (责任审编李付军)铁 道 建 筑 第 ５９ 卷 Ｓｔｕｄｙ ｏｎ Ｓｈｅａｒ Ｒａｔｉｏ ｏｆ Ｃｏｎｃｒｅｔｅ Ｌｉｎｉｎｇ ｗｉｔｈ Ｃｏｒｒｕｇａｔｅｄ Ｓｔｅｅｌ Ｗｅｂｓ ｉｎ Ｌａｒｇｅ Ｓｐａｎ Ｃｏｎｔｉｎｕｏｕｓ Ｒｉｇｉｄ Ｆｒａｍｅ Ｂｒｉｄｇｅ ＹＥ Ｌｉｕｋｅ １ꎬ２ ꎬＬＩ Ｚｉｑｉ １ꎬ２ ꎬＷＡＮＧ Ｌｉ １ (１.Ｓｃｈｏｏｌ ｏｆ Ｃｉｖｉｌ ＥｎｇｉｎｅｅｒｉｎｇꎬＬａｎｚｈｏｕ Ｊｉａｏｔｏｎｇ ＵｎｉｖｅｒｓｉｔｙꎬＬａｎｚｈｏｕ Ｇａｎｓｕ ７３００７０ꎬＣｈｉｎａꎻ ２.Ｎａｔｉｏｎａｌ ａｎｄ Ｐｒｏｖｉｎｃｉａｌ Ｊｏｉｎｔ Ｅｎｇｉｎｅｅｒｉｎｇ Ｌａｂｏｒａｔｏｒｙ ｏｆ Ｒｏａｄ ＆ Ｂｒｉｄｇｅ Ｄｉｓａｓｔｅｒ Ｐｒｅｖｅｎｔｉｏｎ ａｎｄ ＣｏｎｔｒｏｌꎬＬａｎｚｈｏｕ Ｊｉａｏｔｏｎｇ ＵｎｉｖｅｒｓｉｔｙꎬＬａｎｚｈｏｕ Ｇａｎｓｕ ７３００７０ꎬＣｈｉｎａ) Ａｂｓｔｒａｃｔ Ｉｎ ｔｈｅ ｄｅｓｉｇｎ ｏｆ ｌａｒｇｅ ｓｐａｎ ｂｒｉｄｇｅ ｓｔｒｕｃｔｕｒｅꎬｔｈｅ ｓｈｅａｒ ｆｏｒｃｅ ｏｆ ｔｈｅ ｓｔｅｅｌ ｗｅｂ ｎｅａｒ ｔｈｅ ｔｏｐ ｏｆ ｔｈｅ ｐｉｅｒ ｉｓ ｇｅｎｅｒａｌｌｙ ｌａｒｇｅ.Ｗｈｅｎ ｔｈｅ ｂｅａｍ ｈｅｉｇｈｔ ｉｓ ｌａｒｇｅꎬｔｈｅ ｃｏｒｒｕｇａｔｅｄ ｓｔｅｅｌ ｗｅｂ ｉｓ ｅａｓｉｌｙ ａｆｆｅｃｔｅｄ ｂｙ ｔｈｅ ｉｒｒｅｇｕｌａｒ ｇｅｏｍｅｔｒｙꎬ ｗｈｉｃｈ ｌｅａｄｓ ｔｏ ｔｈｅ ｄｅｃｒｅａｓｅ ｏｆ ｓｈｅａｒ ｂｕｃｋｌｉｎｇ ｓｔｒｅｎｇｔｈ.Ｉｎ ｏｒｄｅｒ ｔｏ ｐｒｅｖｅｎｔ ｂｕｃｋｌｉｎｇ ｆａｉｌｕｒｅ ｏｆ ｃｏｒｒｕｇａｔｅｄ ｓｔｅｅｌ ｗｅｂｓꎬ ｔｈｅ ｂｕｃｋｌｉｎｇ ｂｅａｒｉｎｇ ｃａｐａｃｉｔｙ ｏｆ ｃｏｒｒｕｇａｔｅｄ ｓｔｅｅｌ ｗｅｂｓ ｉｓ ｕｓｕａｌｌｙ ｉｍｐｒｏｖｅｄ ｂｙ ａｄｄｉｎｇ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇ ｎｅａｒ ｔｈｅ ｔｏｐ ｏｆ ｔｈｅ ｐｉｅｒ.Ｔａｋｉｎｇ Ｘｕｓｈｕｉｇｏｕ ｂｒｉｄｇｅ ａｓ ｔｈｅ ｅｎｇｉｎｅｅｒｉｎｇ ｂａｃｋｇｒｏｕｎｄꎬｔｈｅ ｓｔｒｅｓｓ ｓｔａｔｅｓ ｏｆ ｓｔｅｅｌ ｗｅｂ ａｎｄ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇ ｕｎｄｅｒ ｔｈｅ ｔｈｉｃｋｎｅｓｓ ｏｆ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇꎬｓｈｅａｒ ｒａｔｉｏ ａｎｄ ｔｈｅ ａｃｔｉｏｎ ｏｆ ｖｅｒｔｉｃａｌ ｌｏａｄ ｗｅｒｅ ｓｔｕｄｉｅｄ ｂｙ ｕｓｉｎｇ ｓｉｍｐｌｉｆｉｅｄ ｃａｌｃｕｌａｔｉｏｎ ｆｏｒｍｕｌａ ａｎｄ ｅｓｔａｂｌｉｓｈｉｎｇ ｆｉｎｉｔｅ ｅｌｅｍｅｎｔ ｎｕｍｅｒｉｃａｌ ｓｉｍｕｌａｔｉｏｎ ｍｏｄｅｌ ｏｆ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇ ｗｉｔｈ ｄｉｆｆｅｒｅｎｔ ｔｈｉｃｋｎｅｓｓ.Ｔｈｅ ｒｅｓｕｌｔｓ ｓｈｏｗ ｔｈａｔ ｗｈｅｎ ｔｈｅ ｔｈｉｃｋｎｅｓｓ ｏｆ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇ ｉｓ ｉｎ ｔｈｅ ｒａｎｇｅ ｏｆ ２０~６０ ｃｍꎬｔｈｅ ｓｈｅａｒ ｅｆｆｅｃｔ ｏｆ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇ ｉｓ ｂｅｔｔｅｒꎬ ａｎｄ ｔｈｅ ｖｅｒｔｉｃａｌ ｌｏａｄ ｈａｓ ｎｏ ｅｆｆｅｃｔ ｏｎ ｔｈｅ ｓｈｅａｒ ｒａｔｉｏ ｏｆ ｃｏｒｒｕｇａｔｅｄ ｓｔｅｅｌ ｗｅｂ ｐｌａｔｅ ａｎｄ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇ. Ｋｅｙ ｗｏｒｄｓ Ｈｉｇｈｗａｙ ｂｒｉｄｇｅꎻ Ｈｉｇｈ ｐｉｅｒ ａｎｄ ｌａｒｇｅ ｓｐａｎ ｃｏｎｔｉｎｕｏｕｓ ｒｉｇｉｄ ｆｒａｍｅ ｂｒｉｄｇｅꎻ Ｃｏｒｒｕｇａｔｅｄ ｓｔｅｅｌ ｗｅｂꎻ Ｔｈｉｃｋｎｅｓｓ ｏｆ ｃｏｎｃｒｅｔｅ ｌｉｎｉｎｇꎻＳｈｅａｒ ｒａｔｉｏꎻＳｔｒｅｓｓ ｓｔａｔｅ (责任审编 郑 冰) (上接第 ５ 页) Ａｄａｐｔａｂｉｌｉｔｙ Ａｎａｌｙｓｉｓ ｏｆ Ｅｘｉｓｔｉｎｇ Ｒａｉｌｗａｙ Ｔｒａｃｋｓ ａｎｄ Ｂｒｉｄｇｅｓ ｔｏ ２７ ｔ Ａｘｌｅ Ｌｏａｄ Ｇｅｎｅｒａｌ Ｆｒｅｉｇｈｔ Ｔｒａｉｎ ａｎｄ Ｉｔｓ Ｓｔｒｅｎｇｔｈｅｎｉｎｇ Ｒｅｃｏｎｓｔｒｕｃｔｉｏｎ Ｃｏｕｎｔｅｒｍｅａｓｕｒｅｓ ＧＵ ＭｕꎬＭＡ ＺｈａｎｇｕｏꎬＸＵ ＬｉａｎｇｓｈａｎꎬＬＩＵ ＪｉｙｕａｎꎬＦＵ ＢｉｎｇｘｉａｎꎬＣＨＥＮ ＦｅｎｇꎬＰａｎ Ｚｈｅｎ (Ｒａｉｌｗａｙ Ｅｎｇｉｎｅｅｒｉｎｇ Ｒｅｓｅａｒｃｈ ＩｎｓｔｉｔｕｔｅꎬＣｈｉｎａ Ａｃａｄｅｍｙ ｏｆ Ｒａｉｌｗａｙ Ｓｃｉｅｎｃｅｓ Ｇｒｏｕｐ Ｃｏ. Ｌｔｄ.ꎬＢｅｉｊｉｎｇ １０００８１ꎬＣｈｉｎａ) Ａｂｓｔｒａｃｔ Ｔｈｉｓ ｐａｐｅｒ ａｎａｌｙｚｅｄ ｔｈｅ ａｄａｐｔａｂｉｌｉｔｙ ｏｆ ｔｈｅ ｅｘｉｓｔｉｎｇ ｒａｉｌｗａｙ ｔｒａｃｋｓ ａｎｄ ｂｒｉｄｇｅｓ ｔｏ ２７ ｔ ａｘｌｅ ｌｏａｄ ｇｅｎｅｒａｌ ｆｒｅｉｇｈｔ ｔｒａｉｎｓ.Ｉｔ ｉｓ ｐｏｉｎｔｅｄ ｏｕｔ ｔｈａｔ ｕｎｄｅｒ ｔｈｅ ｃｏｎｄｉｔｉｏｎ ｏｆ ｍａｉｎ￣ｔｙｐｅ ｃｏｎｆｉｇｕｒａｔｉｏｎ ａｎｄ ｎｏｒｍａｌ ｓｔｒｕｃｔｕｒｅ ｓｔａｔｅꎬｔｈｅ ｅｘｉｓｔｉｎｇ ｒａｉｌｗａｙ ｃａｎ ｍｅｅｔ ｔｈｅ ｏｐｅｒａｔｉｏｎ ｒｅｑｕｉｒｅｍｅｎｔｓ ｏｆ ａ ｆｅｗ ２７ ｔ ａｘｌｅ ｌｏａｄ ｆｒｅｉｇｈｔ ｔｒａｉｎｓ.Ｆｒｏｍ ｔｈｅ ｐｅｒｓｐｅｃｔｉｖｅ ｏｆ ｍａｉｎｔａｉｎｉｎｇ ｔｈｅ ｌｏｎｇ￣ｔｅｒｍ ｏｐｅｒａｔｉｏｎ ｓａｆｅｔｙ ｏｆ ２７ ｔ ａｘｌｅ ｌｏａｄ ｆｒｅｉｇｈｔ ｔｒａｉｎｓ ａｎｄ ｒｅｄｕｃｉｎｇ ｔｈｅ ｍａｉｎｔｅｎａｎｃｅ ｗｏｒｋｌｏａｄꎬｉｔ ｉｓ ｎｅｃｅｓｓａｒｙ ｔｏ ｇｒａｄｕａｌｌｙ ｓｔｒｅｎｇｔｈｅｎ ａｎｄ ｕｐｇｒａｄｅ ｔｈｅ ｔｒａｃｋ ａｎｄ ｂｒｉｄｇｅ ｓｔｒｕｃｔｕｒｅｓꎬａｎｄ ｔｒｅａｔ ｄｉｓｅａｓｅｓ ｏｆ ｒｏａｄｂｅｄ ａｎｄ ｔｕｎｎｅｌ ｓｔｒｕｃｔｕｒｅｓ. Ｂｅｆｏｒｅ ｏｐｅｒａｔｉｏｎꎬ ｉｔ ｉｓ ｎｅｃｅｓｓａｒｙ ｔｏ ｓｔｒｅｎｇｔｈｅｎ ｒｅｃｏｎｓｔｒｕｃｔｉｏｎ ｔｈｅ ｌｉｎｅ ｉｎｆｒａｓｔｒｕｃｔｕｒｅｓ ｔｈａｔ ａｆｆｅｃｔ ｏｐｅｒａｔｉｏｎ ｓａｆｅｔｙ.Ｕｎｄｅｒ ｎｏｒｍａｌ ｏｐｅｒａｔｉｏｎ ｃｏｎｄｉｔｉｏｎｓꎬｉｔ ｉｓ ｎｅｃｅｓｓａｒｙ ｔｏ ｇｒａｄｕａｌｌｙ ｒｅｃｏｎｓｔｒｕｃｔ ｔｈｅ ｒａｉｌｗａｙ ｉｎｆｒａｓｔｒｕｃｔｕｒｅｓ ｗｉｔｈ ｒｅｄｕｃｅｄ ｆａｔｉｇｕｅ ａｎｄ ｄｕｒａｂｉｌｉｔｙ. Ｋｅｙ ｗｏｒｄｓ Ｅｘｉｓｔｉｎｇ ｒａｉｌｗａｙꎻ ２７ ｔ ａｘｌｅ ｌｏａｄ ｇｅｎｅｒａｌ ｆｒｅｉｇｈｔ ｔｒａｉｎꎻ Ｉｎｆｒａｓｔｒｕｃｔｕｒｅꎻ Ａｄａｐｔａｂｉｌｉｔｙꎻ Ｓｔｒｅｎｇｔｈｅｎｉｎｇ ｒｅｃｏｎｓｔｒｕｃｔｉｏｎ (责任审编 李付军) １４