叠合面对叠合剪力墙极限承载力影响的数值分析

归纳总结目前国外相关规范对界面抗剪强度的规定,通过有限元建立预制层和现浇层的接触面,定义叠合面的黏结-脱离损伤模型,分析叠合面的影响.研究结果表明,建立叠合面的黏结-脱离损伤模型能够反映叠合面在受力过程中的脱离破坏程度;在不同轴压比下,叠合面对叠合剪力墙极限承载力影响均较小,边缘构件现浇的叠合剪力墙叠合面脱离破坏程度较边缘构件预制的叠合剪力墙小.

Numerical Analysis to the Adhesive Interface Effects to Ultimate Bearing Capacity of Superimposed Shear Wall

Formulas which were most commonly used to calculate interface shear strength specified in foreign codes were summarized, the contact interaction between the precast concrete layer and the concrete core is modelled using a cohesive property interaction to define the separation behavior between the two surfaces. The result shows that the traction separation models for surfaces can reflect the level of delamination and damage in interface between the precast concrete layer and the concrete core. There is small influence on ultimate bearing capacity of superimposed shear wall under different axial compression ratio, the degree of damage and delamination in the interface of superimposed shear walls with cast in situ boundary element is lower than the superimposed shear walls with prefabricated boundary element.