JIPlKIC 箱构设计原黑 $9.1.3 The characteristics of normal use (compared with the ultimate limit state) Calculated according to different:Ultimate limit state is the failure stage(II a)of the state schema for the establishment of the basis of calculation;and use phase generally refers to the first stage II, thebeam with a crack session
§9.1.3 The characteristics of normal use (compared with the ultimate limit state) ⚫ Calculated according to different: Ultimate limit state is the failure stage (Ⅲ a) of the state schema for the establishment of the basis of calculation; and use phase generally refers to the first stage Ⅱ, thebeam with a crack session
JPKIC 结构设计原理 jhepniiplestncturedesgn Different levels of impact:Compared with the ultimate limit state,more than the normal limit state consequences(such as casualties and economic losses)and severity of the danger of relativelysmaller,lighter,and thus may be appropriate to ensure the reliability of its rate ofrelaxation Requirements
⚫ Different levels of impact: Compared with the ultimate limit state, more than the normal limit state consequences(such as casualties and economic losses) and severity of the danger of relativelysmaller, lighter, and thus may be appropriate to ensure the reliability of its rate ofrelaxation Requirements
JIPlKIC 结构设计原理 The principle of structure design o The different contents of calculation >Ultimate limit state:Including cross section design and review. The calculation determines the size of component design, material,quantity and steelreinforcement layout,to ensure that: YoMa≤Muo >Serviceability limitstate Checking under normal use and deformation of crack width is less than thespecification limits
⚫ The different contents of calculation ： ➢ Ultimate limit state:Including cross section design and review. The calculation determines the size of component design, material, quantity and steelreinforcement layout, to ensure that: γ0Md≤Mu。 ➢ Serviceability limit state ：Checking under normal use and deformation of crack width is less than thespecification limits
JPKIC 结构设计原理 Tfeprniipledistnctiredesign Load and resistance values of the different Ultimate limit state Vehicle loads should be included in the impact factor,the role (or load)effect and the resistance of structural components should be considered a partial coefficients usingthe design value;in a variety of roles (or load) effect the case,should the design valueof the effect The most dangerous combination,and the role of the participatingportfolio(or load)effect situation,access to the different effects of combination coefficients
⚫ Load and resistance values of the different ➢ Ultimate limit state ：Vehicle loads should be included in the impact factor, the role (or load) effect and the resistance of structural components should be considered a partial coefficients usingthe design value; in a variety of roles (or load) effect the case, should the design valueof the effect The most dangerous combination, and the role of the participatingportfolio (or load) effect situation, access to the different effects of combination coefficients
JIPlKIC 结构设计原理 The principle of structure design Serviceability limit state Auto load impact factor should be neglected,the role (or load)effects should be short-term effects and long-term effects of access to one or several combinations.Short-term effects of combination is a permanent role(structural weight)and variablestandard values of the role of the combination effect of frequent value;long-term effectscompared to the permanent role of the standard combination of value and the role ofquasi- permanent value of a variable combination of effects
➢ Serviceability limit state ：Auto load impact factor should be neglected, the role (or load) effects should be short-term effects and long-term effects of access to one or several combinations. Short-term effects of combination is a permanent role (structural weight) and variablestandard values of the role of the combination effect of frequent value; long-term effectscompared to the permanent role of the standard combination of value and the role ofquasipermanent value of a variable combination of effects