山东理工大学：《荷载与结构设计方法》课程教学课件（讲稿，双语）Chapter 6 Other actions

Chapter6 Other actions:其他作用 6.1 thermal actions温度作用 6.2 deformation actions变形作用 6.3 Frost Heave Force冻胀力 6.4 blasting actions爆炸作用 6.5 Vehicle dynamic effect行车动态作用 6.6pre-applied force预加力 G 归东理王大军 SHANDONG UNIVERSITY OF TECHNOLOGY

Chapter 6 Other actions其他作用 6.1 thermal actions 温度作用 6.2 deformation actions 变形作用 6.3 Frost Heave Force 冻胀力 6.4 blasting actions 爆炸作用 6.5 Vehicle dynamic effect 行车动态作用 6.6 pre-applied force 预加力

6.1 thermal actions温度作用 ·Basic concepts and action mechanism基本概念及作用原理 Thermal change on sol id induces thermal deformation Restrain on thermal deformation thermal stress induced Generally,thermal change is also a load 的东理王大军 SHANDONG UNIVERSITY OF TECHNOLOGY

6.1 thermal actions 温度作用 • Basic concepts and action mechanism 基本概念及作用原理 ▫ Generally, thermal change is also a load Thermal change on solid induces thermal deformation Restrain on thermal deformation thermal stress induced

6.1 thermal actions温度作用 。基本概念及作用原理basic concepts and action mechanism ·temperature change温度变化 ·Seasonal change季节变化 ·Thermal difference inside and outside of room室内外温差变化 ·Hydration heat for concrete混凝土水化热 外部 ·Fire hazard火灾 ·Welding on steel members焊接 外露 内福 内部 外部 LOGY

6.1 thermal actions温度作用 • 基本概念及作用原理 basic concepts and action mechanism ▫ temperature change 温度变化  Seasonal change 季节变化  Thermal difference inside and outside of room室内外温差变化  Hydration heat for concrete 混凝土水化热  Fire hazard 火灾  Welding on steel members 焊接

6.1 thermal actions温度作用 。基本概念及作用原理basic concepts and action mechanism ▣residual stress and deformation due to welding焊接应力与焊接变形 ·residual deformation due to welding焊接残余变形 ·由焊缝及其周围不均匀热胀冷缩引起 ·residual stress due to welding焊接残余应力 ·由焊缝冷却收缩阻碍引起 <变形 压住 内应力 焊墙周围温度场 归东理工大军 SHANDONG UNIVERSITY OF TECHNOLOGY

6.1 thermal actions温度作用 • 基本概念及作用原理 basic concepts and action mechanism ▫ residual stress and deformation due to welding 焊接应力与焊接变形  residual deformation due to welding焊接残余变形  由焊缝及其周围不均匀热胀冷缩引起  residual stress due to welding焊接残余应力  由焊缝冷却收缩阻碍引起

6.1 thermal actions温度作用 。1 基本概念及作用原理basic concepts and action mechanism reinforced concrete beam and plate混凝土梁板 板内呈拉应力 混凝土板开裂 温度降低 板变形大于梁 梁内呈压应力 归东理王大军 SHANDONG UNIVERSITY OF TECHNOLOGY

6.1 thermal actions温度作用 • 基本概念及作用原理 basic concepts and action mechanism ▫ reinforced concrete beam and plate混凝土梁板 温度降低 混凝土板开裂 板变形大于梁 板内呈拉应力 梁内呈压应力

6.1 thermal actions温度作用 ·basic concepts and action mechanism基本概念及作用原理 calculation of thermal stress?温度应力的计算 ·Statically determinate structure静定结构 ·No internal stress ·Free movement 由虚功原理计算 ·Statically indeterminate structure超静定结构 Internal stress induced ·Thermal effect:根据变形协调条件，按结构力学方法计算 的东理王大军 SHANDONG UNIVERSITY OF TECHNOLOGY

6.1 thermal actions 温度作用 • basic concepts and action mechanism基本概念及作用原理 ▫ calculation of thermal stress温度应力的计算  Statically determinate structure 静定结构  No internal stress  Free movement 由虚功原理计算  Statically indeterminate structure 超静定结构  Internal stress induced  Thermal effect：根据变形协调条件，按结构力学方法计算

6.1 thermal actions温度作用 。basic concepts and action mechanism基本概念及作用原理 o engineering measures工程处理措施 ·RC structure?混凝土结构 ·设伸缩缝 ·留后浇带 大￥ 伸缩缝 后浇带 ERSITY OF T元CHNOLOGY

6.1 thermal actions温度作用 • basic concepts and action mechanism 基本概念及作用原理 ▫ engineering measures工程处理措施  RC structure混凝土结构  设伸缩缝  留后浇带 伸缩缝 后浇带

6.1 thermal actions温度作用 ·basic concepts and action mechanism基本概念及作用原理 o engineering measures降低焊接应力和焊接变形的措施 ·Optimizing welding steps合理安排焊接次序 ·Multi-stage welding拆分多道焊缝 ·Inverse pre-bending施焊前，预加 分多道焊缝 工 预加反变形 焊接次序交替进行 山东理工大军 SHANDONG UNIVERSITY OF TECHNOLOGY

6.1 thermal actions 温度作用 • basic concepts and action mechanism 基本概念及作用原理 ▫ engineering measures 降低焊接应力和焊接变形的措施  Optimizing welding steps合理安排焊接次序  Multi-stage welding 拆分多道焊缝  Inverse pre-bending 施焊前，预加反向变形

6.2 deformation actions变形作用 ·basic concepts and action mechanism基本概念及作用原理 common deformation actions常见的变形作用 Static determination ·支座移动 静定作用 ·Differential settlements of foundations基础不均匀沉降 ·Creeping and shrink of RC structure混凝土结构的徐变与收缩 ·Forced assembly of members构件的强制装配 Statically indeterminate 超静定作用 Generally deformation is also a load.广义上，变形作用也是荷载 归东罪子大军 SHANDONG UNIVERSITY OF TECHNOLOGY

6.2 deformation actions变形作用 • basic concepts and action mechanism基本概念及作用原理 ▫ common deformation actions常见的变形作用  支座移动  Differential settlements of foundations 基础不均匀沉降  Creeping and shrink of RC structure 混凝土结构的徐变与收缩  Forced assembly of members 构件的强制装配 ▫ Generally deformation is also a load.广义上，变形作用也是荷载 Static determination 静定作用 Statically indeterminate 超静定作用

6.2变形作用deformation actions 。基本概念及作用原理basic concepts and action mechanism ·地基沉降的工程处理措施engineering measures for uneven settlement ·设沉降缝 ·地基加固 ·增加上部结构刚 沉降分布曲线 沉降分布曲线 心外红人& SHANDONG UNIVERSITY OF TECHNOLOGY

6.2 变形作用 deformation actions • 基本概念及作用原理 basic concepts and action mechanism ▫ 地基沉降的工程处理措施 engineering measures for uneven settlement  设沉降缝  地基加固  增加上部结构刚度