钢筋混凝土带腋撑框架结构的力学性能

提出了一种新型的带腋撑钢筋混凝土框架结构。设置的腋撑的上、下端分别和框架梁、框架柱刚接。该新型结构的设计控制截面的位置位于梁腋撑处、柱腋撑处以及框架柱底，和常规的钢筋混凝土框架结构相比，该新型结构的框架梁端、框架柱端的弯矩值、剪力值大幅度减少。试验结果表明，该新型结构在荷载作用下，首先在梁腋撑处的外侧形成塑性铰，然后梁跨中才出现塑性铰，梁端、柱端及节点区受力性能良好，合理的设计，可以保证结构具有良好的承载能力和变形能力。进行了该新型结构的非线形有限元分析，讨论了强柱系数、轴压比、剪跨比、配箍率等参数对该新型结构的抗侧承载力和极限位移的影响。

Mechanical Behavior of Reinforced Concrete Frame Structure with Diagonal Member

A new kind of reinforced concrete (including prestressed concrete) frame structure with diagonal member is put forward. The top and the bottom of the diagonal member are rigidly connected with the frame beam and column. The design controlling sections of the newly structure are located at frame beam-diagonal member joint, column-diagonal member joint and the bottom of column. Comparing with the conventional frame structure, the newly structure’s bending moment and shearing force are greatly reduced. Under load acting, the results of the experiment show that the first plastic hinge appear at lateral surface of the beam-diagonal member joint, and then appear at the middle of the beam, the end of the beam and the beam-column joint have a good performance, and with a reasonable design the newly structure will have a good bearing and deformation capacity. Base on the nonlinear finite element analysis, the influence of the parameters such as strong column coefficient, axial load ratio, shear span ratio and stirrup ratio, on the lateral bearing capacity and the limit displacement of the frame structure with diagonal member is discussed.