长输管道作用下FRP夹心板的数值模拟分析
Numerical Simulation Analysis of FRP Sandwich Panel under the Action of Long-Distance Pipeline

为解决目前在役长输管道悬索跨越存在的两个问题：1) 悬索桥运行期间维修保养费用高，给运营企业带来极大的经济负担；2) 主体通常采用钢结构，结构自重大限制了桥梁跨度。本文在悬索跨越桥面板结构中引入一种新型复合材料FRP(纤维增强聚合物)，FRP夹芯板有很多突出优点，尤其是强度与重量比值高、维护成本低。本文通过LUSAS有限元软件建立3D实体模型仿真模拟桥面板结构的应力变化，验证FRP夹芯板应用桥梁工程的可行性。研究表明：FRP夹芯板的位移、应变、冲击破坏均能满足材料性能的要求，能够代替钢结构用于长输管道悬索跨越结构的设计之中，并且泡沫夹心和玻璃纤维的厚度越大，玻璃纤维方向交错角度越小，越有利于结构强度。
In order to address two problems of running long-distance pipeline suspension crossing: 1) High maintenance cost, which brings great economic burden during the operation; 2) The main structure of steel limited bridge span. In this paper, one new type of composite material FRP (Fibrous Reinforced Polymer) was introduced into suspension bridge deck structure. The FRP sandwich panel has many outstanding advantages, especially in terms of high strength-to-weight ratio and low maintenance cost. One 3D solid model has been established by using LUSAS finite element software to simulate the stress change of the bridge panel structure, and verify the feasibility of applying FRP sandwich panel in bridge project. Studies have shown that displacement, strain, and Hasin failure can meet the requirements of material properties, and can be used for long-distance pipeline suspension crossing design instead of steel structure, and also, the greater thickness and the smaller staggered angle of the glass fiber direction, the more strength of the structural.