构件的几何尺寸及特征值

1、              构件的几何尺寸及特征值 字串7

A、              柱截面设为正文形,取边长为0.4×0.6㎡,   E              500 字串2

则面积A=0.4×0.6=0.25㎡=24×10⁴㎜²            500

惯性矩I_E= = =0.52×10^-2     

              m⁴=0.52×10¹⁰㎜⁴

字串8

C30砼的弹性模量F_C=3.0×10⁴N/㎜²   字串5

则抗弯钢度E_CI_E=0.52×10¹⁰×3.0×10⁴ 字串5

=-1.56×10¹⁴N•㎜² 字串9

=1.56×10⁸N•㎡ 字串2

=1.56×10⁵KN•㎡

B、              框架梁,初步确定截面尺寸为300×600㎜²,

字串9

则面积为A₁=0.3×0.6=0.18㎡                            150 字串4

=18×10⁴㎜²                                                  600 字串4

惯性矩:I₂=bh³/12=                        300 字串7

=0.65×10^-2m⁴                  

=0.54×10¹⁰㎜⁴

字串8

C30砼的弹性模量:E_C=3.0×10⁴N/㎜² 字串6

则抗弯钢度:E_CI_E=3.0×10⁴×0.54×10¹⁰

字串7

=1.62×10¹⁴N•㎡  字串8

=1.62×10⁸ N•㎡ 字串9

=1.62×10⁵KN•㎡

字串2