连续刚构桥悬浇施工菱形挂篮下挠过大分析  

Continous Rigid Frame Bridge Cantilever Casting Construction of Rhombic Hanging Basket Under Excessive Deflection Analysis

作　　者：陈玉清[1] 肖飞[2] 文帆川 顾箭峰[2] 

机构地区：[1]山东建筑大学,济南250101 [2]长安大学,西安710064 [3]云南省公路工程咨询公司,昆明650021

出　　处：《四川理工学院学报（自然科学版）》2013年第4期61-65,70,共6页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

摘　　要：挂篮施工推动了连续刚构桥向大跨高墩发展,而挂篮刚度是影响其施工安全及成桥线形的关键因素。文章以怒江大桥(88+160+88 m的连续刚构桥)为对象,建立有限元模型,计算悬浇施工过程中菱形挂篮的受力和变形,分析预压时其弹性变形超限原因。针对主桁架刚度不足,提出一套补强措施,通过计算分析和实测验证了该措施的可靠有效,可供同类桥梁挂篮施工参考。Hanging basket construction has promoted the development of continuous rigid frame bridge with high pier and large span, and the linear stiffness of hanging basket is the key factor to affect the construction safety and the alignment of the bridge. Based on the Nu River bridge （continuous rigid frame bridge with 88 ＋ 160 ＋ 88m）, the article establishes finite ele- ment model, calculates the stress and deformation of rhombic hanging basket in suspension pouring construction process, and analysis the overrun reason of its elastic deformation under preloading. In view of the stiffness of main truss is insufficient, a set of reinforcing measures are put forward, these measures are proved to be reliable and efficient through the calculation analysis and actual measurement, and they can, provide references for the similar bridge hanging basket construction.

关 键 词：连续刚构桥 挂篮刚度 刚度不足 补强措施 

分 类 号：TB115[理学—数学]