CAJ | 학술논문

U型桥台作为经典的桥台结构形式,在桥梁设计中运用十分广泛。在桥梁运营过程中,U型桥台由于受力形式复杂,容易出现各种病害。根据大量的现场调查,U型桥台的常见病害具有共性。本文在归纳U型桥台主要病害类型的基础上,深入分析U型桥台病害机理,提出U型桥台加固方法。运用ANSYS有限元软件的非线性分析功能,建立加固前后桥台的三维空间实体模型,通过不同高度和宽度的桥台受力分析,对比研究加固前后U型桥台的应力和位移情况,从而对各种加固方法的加固效应加以评估。研究表明：土压力等荷载作用下导致的台身主拉应力偏大,尤其是前墙与侧墙交汇处,是桥台台身开裂的主要内因,因地制宜采用合适的加固方式可有效防止桥台开裂。
U형교태작위경전적교태결구형식,재교량설계중운용십분엄범。재교량운영과정중,U형교태유우수력형식복잡,용역출현각충병해。근거대량적현장조사,U형교태적상견병해구유공성。본문재귀납U형교태주요병해류형적기출상,심입분석U형교태병해궤리,제출U형교태가고방법。운용ANSYS유한원연건적비선성분석공능,건립가고전후교태적삼유공간실체모형,통과불동고도화관도적교태수력분석,대비연구가고전후U형교태적응력화위이정황,종이대각충가고방법적가고효응가이평고。연구표명：토압력등하재작용하도치적태신주랍응력편대,우기시전장여측장교회처,시교태태신개렬적주요내인,인지제의채용합괄적가고방식가유효방지교태개렬。
As a classic structural form, U-shaped abutment is widely used in bridge design. In the process of bridge operation, U-shaped abutment is prone to various diseases due to the complex stress. According to a great deal of field surveies, the typical diseases of U-shaped abutment have common character. Based on major disease types,this paper further analyzed disease mechanism and proposed reinforcement methods on U-shaped bridge abutment. By applying nonlinear analysis function of ANSYS finite element software and establishing three-dimensional solid model for abutment before and after reinforcement, with the mechanical analysis under different height and width of abutment, this paper is intended to assess reinforcement effect of various methods via relative analysis on stress and displacement before and after reinforcement. Investigation shows that the larger principal tensile stresses under multiple loads such as earth pressure are the main cause of cracking of abutment, especially at junction of front wall and side wall. On the basic of actual situations, the suitable reinforcement methods can keep U-shaped abutment from cracking.