钢结构基础,课件
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正常使用极限状态对应于结构或构件达到正常使 用或耐久性能的某项规定限值，包括出现影响正常使 用（或外观）的变形、振动和局部破坏。
1.4.2 Load effect analysis of the
structure 结构的荷载效应分析
Designing the steel structure need to handle two factors ：One is the resistance of the structure and member；the second is the load effect exerted on the structure. Load effect can be got by means of the inner force analysis.
1.4 Limit States and the Law of Probability Limit States of Steel Structure 钢结构的极限状态和概率极限状态法
1.4.1 Limit States of Steel Structure 钢结构的极限状态
1.4.2 Load Effect Analysis of the Structure 结构的荷载效应分析
结构设计要解决的根本问题是在结构的可靠和 经济之间选择一种最佳的平衡，使由最经济的途径 建成的结构能以适当的可靠度满足各种预定的功能 要求。
结构的可靠性理论已进入以概率理论为基础的 极限状态设计方法，简称概率极限状态设计法。
内力分析根据是否考虑钢材塑性性能分为： 弹性分析和非弹性分析。
1.4.3 The Law of Probability Limit States 概率极限状态法
The fundamental problem for structure design to solve is to choose an optimum equilibrium between the reliability and economy，and make the structure constructed per the most economic method meet the desired performance demands per proper degree of reliability. Limit States design method ,which is based on probability theory, has been used in structural reliability theory, is called the Law of Probability Limit States.
1.4.3 The Law of Probability Limit StatesHale Waihona Puke Baidu概率极限状态法
1.4.4 Design Expression 设计表达式
1.4.1 Limit States of Steel Structure 钢结构的极限状态
Limit States of Steel Structure is divided into two types: the limit State of loadbearing capacity and the limit State of the regular usage.
承载力极限状态对应于结构或构件达到最大承载 力或出现不适于继续承载的变形，包括倾覆、强度破 坏、疲劳破坏、丧失稳定、结构变为机体或出现过度 的塑性变形。
2. Limit State of the regular usage corresponds to the situation that the structure or the member reach the certain allowable value for the regular usage or endurance, including: the deformation for regular usage(or appearance), vibration and the part damage.
设计钢结构需要处理两个方面的因素： 一是结构和构件的抗力； 二是荷载施加于结构的效应(荷载效应通过内力 分析来解)。
Considering of the effect of deformation or not, the inner force analysis is divided into: one rank analysis and two rank analysis;
钢结构的极限状态分为承载力极限状态和正常 使用极限状态两大类。
1. Limit State of load-bearing capacity corresponds to the situation that the structure or the member reach the maximum bearing capacity, or the deformation disallow them to carry more force, including: overturn, strength damage 、fatigued damage 、failure of stability 、the structure turns into the changeable system or the excessive plastic deformation occurs.
内力分析根据是否考虑变形影响分为：一阶 分析和二阶分析；
Considering of the plastic performance of steel material or not, the inner force analysis is divided into: elastic analysis and inelastic analysis.
1.4.2 Load effect analysis of the
structure 结构的荷载效应分析
Designing the steel structure need to handle two factors ：One is the resistance of the structure and member；the second is the load effect exerted on the structure. Load effect can be got by means of the inner force analysis.
1.4 Limit States and the Law of Probability Limit States of Steel Structure 钢结构的极限状态和概率极限状态法
1.4.1 Limit States of Steel Structure 钢结构的极限状态
1.4.2 Load Effect Analysis of the Structure 结构的荷载效应分析
结构设计要解决的根本问题是在结构的可靠和 经济之间选择一种最佳的平衡，使由最经济的途径 建成的结构能以适当的可靠度满足各种预定的功能 要求。
结构的可靠性理论已进入以概率理论为基础的 极限状态设计方法，简称概率极限状态设计法。
内力分析根据是否考虑钢材塑性性能分为： 弹性分析和非弹性分析。
1.4.3 The Law of Probability Limit States 概率极限状态法
The fundamental problem for structure design to solve is to choose an optimum equilibrium between the reliability and economy，and make the structure constructed per the most economic method meet the desired performance demands per proper degree of reliability. Limit States design method ,which is based on probability theory, has been used in structural reliability theory, is called the Law of Probability Limit States.
1.4.3 The Law of Probability Limit StatesHale Waihona Puke Baidu概率极限状态法
1.4.4 Design Expression 设计表达式
1.4.1 Limit States of Steel Structure 钢结构的极限状态
Limit States of Steel Structure is divided into two types: the limit State of loadbearing capacity and the limit State of the regular usage.
承载力极限状态对应于结构或构件达到最大承载 力或出现不适于继续承载的变形，包括倾覆、强度破 坏、疲劳破坏、丧失稳定、结构变为机体或出现过度 的塑性变形。
2. Limit State of the regular usage corresponds to the situation that the structure or the member reach the certain allowable value for the regular usage or endurance, including: the deformation for regular usage(or appearance), vibration and the part damage.
设计钢结构需要处理两个方面的因素： 一是结构和构件的抗力； 二是荷载施加于结构的效应(荷载效应通过内力 分析来解)。
Considering of the effect of deformation or not, the inner force analysis is divided into: one rank analysis and two rank analysis;
钢结构的极限状态分为承载力极限状态和正常 使用极限状态两大类。
1. Limit State of load-bearing capacity corresponds to the situation that the structure or the member reach the maximum bearing capacity, or the deformation disallow them to carry more force, including: overturn, strength damage 、fatigued damage 、failure of stability 、the structure turns into the changeable system or the excessive plastic deformation occurs.
内力分析根据是否考虑变形影响分为：一阶 分析和二阶分析；
Considering of the plastic performance of steel material or not, the inner force analysis is divided into: elastic analysis and inelastic analysis.