弹性地基上正交各向异性板的低速冲击响应  

Low speed impact response of orthogonal anisotropic plate on elastic foundation

作　　者：阴小梅 李锟 YIN Xiaomei;LI Kun(Management Committee of Haidong Industrial Park,Haidong 810600,China;School of Civil Engineering, Qinghai University, Xining 810016 , China)

机构地区：[1]海东工业园区管理委员会,青海海东810600 [2]青海大学土木工程学院,青海西宁810016

出　　处：《青海大学学报（自然科学版）》2018年第6期28-33,共6页Journal of Qinghai University(Natural Science)

基　　金：青海省科学技术厅应用基础研究计划项目(2016-ZJ-721;2017-ZJ-783)

摘　　要：为了研究弹性地基上钢筋混凝土板在冲击荷载作用下的应力及位移特征,文中以弹性地基与正交各向异性板的接触作用为分析模型,采用显式有限元方法建立了弹性地基与四边自由的正交各向异性板冲击作用的分析模型,计算了弹性地基和正交各向异性弹性板的应力场及位移场。数值模拟结果表明:四边自由的正交各向异性板在冲击荷载作用下其底部受拉,顶部受压,其应力分布特征与薄板弯曲的应力分布特征相近,板中最大应力对称出现在距板底中央的1/3处;地基沉降主要出现在与板接触的有限区域内,且发生在距地基表面的0. 0～1. 2 m深度范围内。本文的计算结果可为评估弹性地基及正交各向异性板在冲击荷载作用下的安全性提供计算依据。To explore the stress and displacement of reinforced concrete plate on the elastic founda-tion under impact load.The analysis model of elastic foundation and free orthogonal anisotropic plate is established,through the explicit finite element method,the stress and displacement of elastic foun-dation and orthogonal anisotropic elastic plate are calculated.The numerical simulation results show that the tensile stress appears at the bottom of the plate,and the pressure stress occurs at the top of plate.Its stress distribution characteristics are similar to the stress distribution characteristics of the plate bending,under the impact.Meanwhile,the maximum stress of the plate occurs in a third of the center of the board symmetrically.The foundation subsidence appears within the limited area of con-tact with the board,in the plane scope.And the vertical displacement occurs within the depth of0.0~1.2m from the surface of the ground.The results of this paper can provide the calculation ba-sis for evaluating the safety of elastic foundation and orthogonal anisotropic plate under impact load.

关 键 词：弹性地基 正交各向异性板 冲击荷载 Mises等效应力 沉降 

分 类 号：TU348[建筑科学—结构工程]