摘要
预应力混凝土连续刚构桥施工过程中预应力张拉和合龙顶推力对成桥结构的力学性能存在重要影响。通过一四跨预应力混凝土连续刚构桥施工预应力和合龙顶推力对成桥结构内力和位移影响的参数化分析,获得了分段张拉预应力大小与合龙顶推力对四跨连续预应力混凝土刚构桥成桥内力的影响规律。结果表明:合理预应力及顶推力的施加对此类桥梁在安全性、结构线型以及耐久性方面都能取得较好的提高效果,可为类似工程参考。
with regards to the mechanical properties of prestressed concrete continuous rigid-frame bridge,tensioning prestress and mid-span jacking force have great influence on these aspects in the construction process.The structural internal force and displacement of a four-span continuous rigid bridge under those above mentioned load were analyzed parametrically and the distribution effects of prestress and jacking force on completion state was summarized.The result indicated that it is practical and significant to the improvement about safety,line type and durability of the bridge structure with exerting legitimacy prestress and jacking force,and the results of this study can provide a reference for similar projects.
出处
《上海公路》
2017年第2期25-30,共6页
Shanghai Highways
关键词
连续刚构桥
预应力
顶推力
施工过程
continuous rigid-frame bridge
prestress
jacking force
construction
