波形钢腹板预应力混凝土箱梁结构空间分析方法  

Structural spatial analysis method of prestressed concrete box girder with corrugated steel webs

作　　者：谢旭[1] 朱越峰[1] 张治成[1] 黄剑源[2] 

机构地区：[1]浙江大学土木工程学系 [2]宁波大学土木工程学系,浙江宁波315211

出　　处：《浙江大学学报（工学版）》2008年第9期1506-1514,共9页Journal of Zhejiang University：Engineering Science

摘　　要：为了提高波形钢腹板预应力混凝土箱梁的结构计算精度和适应工程结构空间分析的需要,按板壳有限元计算理论提出了一种新的算法.分别将腹板和翼板模拟成正交异性和正交同性板单元,根据箱梁变形特点用二次和三次形函数模拟板单元的变形,按亚参元计算方法建立单元的刚度方程.若干静力和自振特性分析算例结果表明,新算法得到的计算结果与一般有限元的计算结果相吻合,验证了本算法的计算精度.与现行波形钢腹板箱梁计算理论相比,新算法具有计算精度高、可以考虑空间变形影响的优点,而计算自由度远小于一般板壳有限元算法,是一种实用性较强的分析方法.In order to improve the structural calculation precision of prestressed concrete box girder with corrugated steel webs and develop spatial analysis of this kind of structures, a new numerical method was proposed based on finite element theory with shell element. The corrugated steel web and the concrete flanges were simulated with orthotropic plate element and isotropic plate element respectively. Two- and three-order displacement functions of plate elements were introduced according to the deformation charac- teristics of box girder. The stiffness matrices were established by the sub-parametric element method. The results of static and free vibration analysis obtained using the proposed method showed a good agreement with those from the standard finite element techniques . Compared with the current computational theory of prestressed concrete box girder with corrugated steel webs, the precision of the proposed method, is remarkably improved by taking the effects of spatial deformation into analysis with fewer elements, and the method is proved to be practical.

关 键 词：波形钢腹板 结构空间分析 箱梁 有限元方法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]