基于三维离散单元法的无筋砌体墙受力性能分析

ANALYSIS OF MECHANICAL BEHAVIOR OF UNREINFORCED MASONRY WALL BASED ON DISCRETE ELEMENT METHOD

针对砌体墙体为二相复合材料的特点,利用离散单元法软件3DEC建立顺砖砌筑式及一顺一丁式两种砌筑方式的砌体墙离散元模型,通过选取合理的本构关系及材料参数,模拟墙体在面内单调荷载及往复荷载作用下的受力性能,模拟结果的荷载-位移曲线及墙体破坏模式均与试验结果吻合较好。表明离散单元法可有效用于砌体墙的面内受力性能分析。

According to the characteristics of masonry wall for two-phase composite material,the discrete element method software 3DEC is used to establish element model of suitable brick masonry type and Yishun yiding type of masonry wall masonry way.Through choosing reasonable constitutive relation and material parameters,mechanical behavior of wall under monotonic and reciprocating loads is simulated.The load displacement curve and wall failure mode of the simulation results are in good agreement with the test results.The results show that the discrete element method can be used to analyze the in-plane mechanical behavior of masonry walls effectively.