Volume 2,Issue 9
再生骨料混凝土梁的有限元分析
为了解不同再生骨料取代率下，再生混凝土梁的各种性能，建立其有限元模型。模型各项参数由实际实验和公式计算所得，后对再生混凝土梁的支座反力，塑性应力进行分析，得到极限荷载、开裂荷载和荷载- 位移曲线。其分析结果表明：随着再生骨料的而加入，梁的极限荷载降低，位移减少，抗拉能力下降，梁更容易发生脆性破坏。当取代率从40% 到50% 时，梁的极限荷载下降幅度增大。相比较而言，掺量为30% 时与普通混凝土梁差距不大，所以再生骨料取代率为30% 的混凝土梁性价比最高。
[1] Bairagi N K，Kishore R．Behavior of concrete with different proportions o f n a t u r a l a n d r e c y c l e d a g g r e g a t es，Res o u r c e［J］．Con s e r v a t i o n a n d Recycling,1993,9（3）：109．
[2] i̇lker Bekir Topçu and Nedim Firat Günçan. Using waste concrete as aggregate[J]. Cement and Concrete Research, 1995, 25(7) : 1385-1390.
[3] Sumaiya B. Huda and M. Shahria Alam. Mechanical and Freeze-Thaw Durability Properties of Recycled Aggregate Concrete Made with Recycled Coarse Aggregate[J]. Journal of Materials in Civil Engineering, 2015, 27(10) : 04015003-04015003.
[4] Ji-Liang Peng et al. Stress–Strain Relationship Model of Recycled Concrete Based on Strength and Replacement Rate of Recycled Coarse Aggregate[J]. Journal of Materials in Civil Engineering, 2019, 31(9) : 04019189-04019189.
[5] Marian Sabău and Jesús Remolina Duran. Prediction of Compressive Strength of General-Use Concrete Mixes with Recycled Concrete Aggregate[J]. International Journal of Pavement Research and Technology, 2021, : 1-13.
[6] Du, T., Wang, W., Liu, Z. et al. The complete stress-strain curve of recycled aggregate concrete under uniaxial compression loading. J. Wuhan Univ. Technol.- Mat. Sci. Edit. 25, 862–865 (2010). https://doi.org/10.1007/s11595-010-0109-9
[7] Haraji M H .Developmen t/ splice strength of reinf orcing bars embedded in pail and fiber reinforced concret e[ J] .ACI Structu ral Journal, 1994, 91( 5) :511.