自保温再生混凝土砌块砌体抗剪性能数值模拟

为探讨研制的自保温再生混凝土砌块砌体的抗剪性能,选取10.6 MPa和4.5 MPa两种强度砌块及15 MPa、7.5 MPa和5.0 MPa三种强度砂浆,分析了不同材料在ABAQUS数值模拟中本构模型和相应参数的选取,进行了不同强度的砌块与砂浆组合砌筑砌体抗剪性能的数值模拟分析.结果表明:砌块和砂浆的强度较为一致时,有利于砌体发挥较好的受剪性能;单独提高砌块或砂浆的强度,对砌体受剪性能的提升效果有限;但砂浆强度高时,砌体受剪破坏后仍能保持较高的残余应力;砂浆强度过低时,砌体受剪性也随之急剧降低.

Numerical Simulation of Shear Performance for Self Insulated Recycled Concrete Block Masonry

In order to discuss the shear performance of self insulated concrete block masonry, two kinds of blocks with 10.6 MPa and 4.5 MPa strength and three kinds of mortars with 15 MPa, 7.5 MPa and 5.0 MPa strength are selected, the constitutive model and corresponding parameters selection of different materials in the ABAQUS numerical simulation are analyzed, and the numerical simulation analyses of the shear performance of masonry constructed with different strength block and mortar are carried out. The results show that when the strength of the masonry and mortar is more consistent, it is beneficial to the masonry to show a better shear performance, the shear performance of the masonry will be limited improved if separately to improve the block or mortar strength. But when the mortar strength is high, the masonry could still maintain a high residual stress after shear failure stage, and the shear property of the masonry decreases sharply when the strength of the mortar is too low.