一种求解简支钢—混结合梁通用挠度表达式的数学解析方法

钢梁与混凝土板之间的相对滑移,会使结合梁的整体刚度降低,在静力和动力计算时,必须要考虑这种滑移带来的影响。通过直接平衡法对结合梁的基本动力理论进行推导,得到集中荷载作用下结合梁的动力响应表达式;经过一系列的数学变换,使通常只能数值求解的响应表达式满足级数求和条件,以相应的Bernoulli函数和Bernoulli数代入,即可得到集中荷载作用下简支结合梁的通用挠度表达式,此表达式不仅能体现不考虑滑移的单一材料梁的挠度结果,也能反映因滑移引起的附加挠度的影响。把理论分析结果与实测结果进行了对比分析,结果吻合良好。研究结果表明:考虑相对滑移后,结合梁的振动方程形式更为复杂,表现出与普通梁不同的动力特性;在进行结合梁的挠度计算时,本质上可把静力分析结果可看作动力响应的一种特殊形式。

桃河特大桥主跨65m钢—混结合梁施工过程控制

采用虚拟层合板—壳—梁—实体组合单元法对桃河特大桥施工过程进行了有限元仿真分析,并与实测结果进行了对比,得出如下结论:虚拟层合板—壳—梁—实体组合单元法能够以少量的单元精确模拟结合梁的几何细节,避免了结合梁施工过程力学分析中的重复建模、节点耦合等难题;"U"型钢梁在移梁架设过程中各控制截面的实测应力变化较小,架设过程平稳、顺利;各施工阶段钢梁和钢筋混凝土桥面板应力实测值与理论值较为吻合。

钢桥、钢—混结合梁桥的发展及其应用实例

简述钢桥及结合梁桥的发展,介绍了钢—混结合梁桥的特点、分类、适用性及经济性比较;详细介绍了德国有代表性的5座钢—混结合梁桥;提出我国桥梁应向钢桥及钢—混结合梁桥发展。

The Continuum Analytical Method of Steel Frame- Reinforced Concrete Shear Wall Mixed Structure

The inter-story drift stiffness considered the semirigidity of beam and column joints connection, and P-Delta second order effect of steel frame parts in the mixed structure is presented in the paper. After considering on the influence of semirigidity between steel beams and steel columns, second order effect of beam-column members for steel frame and structural second order effect, the traditional continuum analytial method used in RC shear-frames wall structure is developed to steel frames-reinforced concrete shear wall mixed structure subject to horizontal load in this paper. A continuum approach, which is suitable for analyzing steel frames-reinforced concrete shear wall mixed structure subject to horizontal load, is presented. The method is relatively simple and more practical. It will be referred to structural design for steel frames-reinforced concrete shear wall mixed structure.