文章摘要
胡成,周力,李霞.基于无应力状态法的下承式拱桥吊杆张拉次序优化[J].安徽建筑大学学报,2019,27(1):6-11
基于无应力状态法的下承式拱桥吊杆张拉次序优化
Suspender Tension Sequences Optimization for Through Arch BridgeBased on The Unstressed Status Method
  
DOI:
中文关键词: 下承式拱桥  无应力状态法  吊杆  张拉力  张拉次序
英文关键词: through arch bridge  unstressed status method  suspender  tensioning force  tension sequence
基金项目:
作者单位
胡成 合肥工业大学土木与水利工程学院安徽合肥230009 
周力 合肥工业大学土木与水利工程学院安徽合肥230009 
李霞 合肥工业大学土木与水利工程学院安徽合肥230009 
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中文摘要:
      太和三桥为主跨152 m 的下承式钢管混凝土系杆拱桥,吊杆张拉施工时采用无应力状态控制法,以 成桥时吊杆实际内力与设计值的误差小于2% 为目标。由于系杆拱桥吊杆长度较短,张拉时锚头拔出量或回缩 量不易控制,容易产生较大误差,提出将伸缩量换算为张拉力进行施工控制,并对不同的吊杆张拉次序进行 对比分析,确保结构整体受力合理、张拉过程安全。建立全桥有限元模型,分析4 种张拉方案下的成桥吊杆 力、拱肋位移、系梁位移、拱肋应力和系梁应力。结果表明,四种方案的成桥吊杆力与设计成桥吊杆力都相 当接近,相比较而言,方案3 的成桥拱肋线性良好,系梁位移及应力值在张拉过程中变化相对平缓一些。
英文摘要:
      The third Taihe bridge is a concrete-filled steel tubular tied through arch bridge with a main span of 152m, control of the tension in suspenders by the unstressed status method and aim for that errors of suspender force at finished stage are less than 2% of design value. Due to the shortness of suspender length,it is difficult to control the amount of evulsion or retraction displacement of anchorage,or it will tend to produce large errors,so make the stretching displacement control change into suspender tension control. The tension sequences of the suspender are comparative analyzed to ensure the reasonable of the force of the overall structure and the safety of the stretching process of the suspender in the construction. Establishing the finite element model for the whole bridge,the suspender force,displacement and stress of the arch ribs and tied beam under four schemes were analyzed. The results showed that the suspender force of the arch bridge are quite close to the design value,by comparison,for the scheme three,the geometric shape of the arch ribs are good ,the changes of the displacement and stress of the tied beam was relatively gentle.
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