摘要
拉锚式坞墙结构在大型船坞工程中广泛采用,但船坞的结构计算中,往往引入多种假设,因而无法获得严密的解答.结合启东丰顺船坞坞墙工程施工实际情况,分析拉锚式钢筋混凝土坞墙施工期特点.借助大型三维有限元软件MSC.Marc分别建立4种典型工况有限元计算模型,选取足够大的地基计算范围,以减少地基的影响,得出各工况下坞墙结构位移及应力特点,并将有限元计算结果与实测数据进行比较,以分析施工工序对坞室墙受力的影响.分析表明拉锚结构能够有效降低坞墙体系的水平位移及土体、混凝土结构的有效应力,从而提高拉锚体系的稳定性.当拉锚体系形成之后,原先由部分土体所承受的坞室墙前后荷载差所形成的应力,全部通过钢拉杆传递给锚碇桩,从而明显改善坞室墙及整体的变形.
The wing wall with anchor rod is widely used in the large scale dock. But there are varieties of assumptions which are introduced in the calculation of the dock structure, so that ideal answers can＇t be obtained. In order to find out the characteristics of deformation and force of the wing wall, this paper focuses on the realities of the wing wall engineering in Qidong Fengshun dockyard. Finite element calculating models are set up to calculate the displacement and stress of the dock wall structure for typical working conditions respectively with the aid of the large-scale software MSC. Marc and a sufficiently large foundation is selected to reduce the impact of the foundation. Then the calculation results of the finite element method are compared with the measured data to analyze how the construction process affects the force of the wing wall. The anchor structure can enhance the stability of the system by reducing the horizontal displacement of the wing wall and effective stress of solum and concrete structure effectively. The stress that part solum was originally subjected to give by the load difference before and after the wall almost through the steel bars are transmitted to anchorage pile bear after the system had been formed. Thus the dock chamber wall and overall deformation are significantly improved.
出处
《水利水运工程学报》
CSCD
北大核心
2013年第3期71-77,共7页
Hydro-Science and Engineering
关键词
拉锚式坞墙
施工期
有限元
应力传递
wing wall with anchor rod
construction period
finite element
stress transfer
