新型混凝土砌块EPS复合墙体抗剪承载力的计算

The Calculation of Shear Strength of a New Concrete Block-EPS Composite Wall

新型混凝土砌块EPS复合墙体是由轻质混凝土空心砌块做为外模,EPS混合土做为内模组合而成。为研究该新型墙体的抗剪性能,本文设计了不同高宽比、竖向正应力、以及不同内芯强度的该新型复合墙体1/2缩尺模型共6片,通过低周反复试验得出该新型复合墙体极限抗剪强度,采用以该新型复合墙体抗压强度的函数来表示其抗剪强度。对实测数据回归分析,建立出适合该新型墙体的抗剪理论计算公式:V_u≤1/(0.281+1.255λ)(0.20(f_(G,m)^(1/2))bh_0+0.12N),该公式具有一定的理论依据和实用价值,可供实际工程设计参考使用。

A New concrete block-EPS composite wall is composed by a light hollow concrete block as the outer model and EPS mixed soil as intemal model combination.This paper designs a 1/2 sacle model of the new composite wall with different height width ratio,vertical stress, as well as the core strength. Based on the measurement of the new wall in MTS cyclic load test, the shear bearing capacity is obtained.The MTS cyclic load test experimental data is analyzed by regression analysis,and finally get a shear theory calculation formula：V_u≤1/（0.281＋1.255λ）（0.20（f_（G,m）^（1/2））bh_0＋0.12N）.The formula suit well for the newcomposite wall which can supply reference for engineering design.