轴心受压构件承载力计算 轴心受拉构件承载力计算

概述 纯扭构件扭曲截面承载力计算 复合受扭构件承载力计算

正常使用极限状态的特点 拉、压杆的刚度要求 梁和桁架的变形限制 钢框架的变形限制 振动的限制

➢ 钢结构的特点和应用 ➢ 钢结构的建造过程和内在缺陷 ➢ 钢结构的组成原理 ➢ 钢结构的发展

本章综合应用3D命令绘制常见的房屋等建筑造型。 17.1 标准间立体图 17.3 六角凉亭

1 概率极限状态设计法和疲劳设计的容许应力法 2 钢结构材料 3 钢结构的连接设计 4 轴心受力构件设计 5受弯构件设计 6拉弯和压弯构件设计

1. First listen to and then talk about lifelong education 2. Read about why and how people pursue continuing education 3. Write about various ways of learning 4. Practice reading skills: contextual meaning 5. Practice translating skills: splitting 6. Learn and practice paragraph development by example 7. Learn to write an online program introduction 8. Visit Culture Salon about the concepts and practice of lifelong education

1. first listen to and then talk about environmental problems 2. read about an interview of a group of exports on environmental problems 3. write about what we should do to protect our Earth 4. practice reading skills: word attack strategies 5. practice translating skills: extension 6. learn and practice sentence functions 7. learn how to write a letter of invitation to an symposium, forum or conference 8. visit Culture Salon about our environment

1. Listen and talk about the problem of drug abuse 2. Read about the disastrous effects of Ecstasy 3. Write about the risks of taking drugs or other harmful substance 4. Practice reading skills: text cohesive devices 5. Practice translating skills: translation of “it” 6. Learn and practice paragraph development by cause and effect 7. Learn to write a public warning message

1. Listen and talk about travel 2. Read about what can be learnt from traveling 3. Write an introduction to your home town 4. Practice reading skills: pragmatic meaning 5. Practice translating skills: synthesis 6. Learn and practice paragraph development by comparison and contrast 7. Learn to write a trip itinerary