结构设计中经常用到的几个表格.doc

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1、普通钢筋强度设计值牌号抗拉强度设计值fy抗压强度设计值f’yHPB300270270HRB335、HRBF335300300HRB400、HRBF400、RRB400360360HRB500、HRBF500435410混凝土保护层最小厚度（mm）环境类别板、墙、壳梁、柱、杆一1520二a2025二b2535三a3040三b4050注：1.砼强度不大于C25时，表中数值增加5mm。2.50年限按上表取值，100年限乘以1.4消防车轮压作用下单向板的等效均布荷载值（KN/m2）板跨（m）覆土厚度（m）≤0.250.500.751.001.251.501.752.002.25≥2.50≥235.

2、032.429.727.124.521.819.216.613.911.3消防车轮压作用下双向板的等效均布荷载值（KN/m2）板短边跨度（m）覆土厚度（m）≤0.250.500.751.001.251.501.752.002.25≥2.502.035.032.429.727.124.521.819.216.613.911.32.533.130.728.325.823.421.018.616.113.711.33.031.329.126.924.622.420.218.015.713.511.33.529.427.425.423.421.419.317.315.313.311.34.027.

3、525.723.922.120.318.516.714.913.111.34.525.624.022.420.819.217.716.114.512.911.35.023.822.421.019.618.216.915.514.112.711.35.521.920.719.518.417.216.014.813.712.511.3≥6.020.019.018.117.116.115.214.213.212.311.3