已知一矩形截面偏心受压柱的截面尺寸https://bgk-photo.cdn.bcebos.com/96dda144ad3459825863a4f31cf431adcaef84e2.jpg柱的计算长度https://bgk-photo.cdn.bcebos.com/00e93901213fb80e813820b626d12f2eb83894e2.jpg,混凝土强度等级为C35,fc = 16.7N/mm2,用HRB400级钢筋配筋,fy=f’y=360N/mm2,轴心压力设计值N = 400 KN,弯矩设计值M = 235.2KN·m,试按对称配筋进行截面设计。