05月梁桥专题-梁格和PSC设计专题0513.pdfVIP

midas Civil 2010梁桥专题—梁格 Integrated Solution System for Bridge and Civil Strucutres 目录 一、剪力-柔性梁格理论 1. 纵梁抗弯刚度·······································································3 2.横梁抗弯刚度······································································· 4 3.纵梁、横梁抗扭刚度··························································· 4 4.虚拟边构件及横向构件刚度··············································· 5 二、单梁、梁格模型多支座反力与实体模型结果比较 三、采用梁格建模助手生成梁格模型 1. 前言·······················································································7 2. 结构概况···············································································7 3. 梁格法建模助手建模过程及功能亮点·······························11 4. 修改梁格··············································································22 5. 在自重、偏载作用下与FEA实体模型结果比较················24 四、结合规范进行PSC设计 midas 梁桥专题—梁格 梁格 Civil 2010 一、剪力-柔性梁格理论 1.纵梁抗弯刚度 【强制移轴（上部结构中性轴）法】 a.各纵梁中性轴与上部结构中性轴基本重合 b.强制移轴，使各纵梁中性轴与上部结构中性轴基本重合，等效 纵梁抗弯刚度 3 midas 梁桥专题—梁格 梁格 Civil 2010 2.横向梁格抗弯刚度 3.纵梁、横梁抗扭刚度 4 midas 梁桥专题—梁格 梁格 Civil 2010 4.虚拟边构件及横向构件刚度 此处d’为顶板厚度。 此处d为顶板厚度。 5 midas 梁桥专题—梁格 梁格 Civil 2010 二、单梁、梁格模型多支座反力与实体模型结果比较 比较结果：与实体模型结果相比较，可得出在自重荷载作用下，单梁模型计算的多支座反 力结果失真，而梁格模型结果较合理。