The torsion of composite beams of steel and concrete and the limit analysis based on the theory of twisted members with thin walled open section and restraint of warping are discussed.
对钢与混凝土组合梁扭转进行了探讨，提出了以开口薄壁杆件的约束扭转理论为基础的扭转极限分析方法。
2
Started with the analysis of temperature field, the temperature-warping stress and temperature contraction stress of porous concrete are studied, and the location of joint are discussed.
But in the use process discovered the main existence the questions are the cross center down-warping and concrete of the fixing of pier and girder dehiscence.