文档介绍：房屋结构的适用性要求
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate sizeb ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
(1)材料性能：与材料的弹性模量E成反比；
(2)构件的截面：与截面的惯性矩I成反比，如矩形截面梁，其截面惯性矩
(3)构件的跨度：与跨度l的4次方成正比，此因素影响最大。
梁的变形主要是弯矩引起的，叫弯曲变形。剪力所引起的变形很小，一般忽略不计。〔桁架内力可以是拉力或压力〕
(三)混凝土结构的裂缝控制分为三个等级：
(1)构件不出现拉应力；
(2)构件虽有拉应力，但不超过混凝土的抗拉强度；
(3)允许出现裂缝，但裂缝宽度不超过允许值。
房屋结构的适用性要求
〔一〕适用性要求的概念
房屋结构除了要保证平安外，还要满足适用性的要求，在设计中称为正常使用的极限状态。这种极限状态相应于结构或构
件到达正常使用