摘要
利用LS-DYNA建立了砌体单片墙的离散化有限元模型,对砌体单片墙在面内荷载作用下的静、动力学性能进行了数值仿真分析;在数值分析过程中使用接触算法代替砂浆模拟砌块之间的粘结作用,获得了面内荷载作用下墙体的荷载-位移曲线。由结果可知,在单调荷载作用下,其载荷-位移曲线可分为四个阶段,分别为弹性阶段、塑性阶段、"强化"阶段、承载力下降阶段。并对竖向压力对单片墙抗剪承载力的影响作了讨论,得出在循环往复荷载作用下,载荷-位移曲线呈现梭形或捏拢形骨架曲线,解释了滞回曲线在每个循环过程的变化规律以及开洞对墙体滞回性能的影响,得出砌体单墙在面内方向有良好的变形和耗能能力。
Numerical analysis of masonry panels under in-plane loading is carried out by discrete finite element modeling strategy. The LS-DYNA commercial software is implemented to simulate the static and dynamic mechanical behavior of masonry panel. In the numerical analysis, the contact method is used to simulate the bonding effect of mortar on the block, and the load-displacement curve of the wall under monotonic load is obtained. It can be seen from the results that load-deformation curve can be divided into "four stages" under monotonic load, and shear capacity of masonry panel supported the vertical pressure has been discussed. Under the cyclic reciprocating load, the load-displacement curve shows skeleton of the spindle or pinch-shaped, which account for the reason of the change of hysteresis curve in each cycle and the influence of open hole on the hysteretic behavior of the wall. The conclusion that the wall has good deformation and energy dissipation in the in-plane direction is drawn.
作者
张岩
刘沛允
秦宇
张恩
杨会伟
路国运
Zhang Yan;Liu Peiyun;Qin Yu;Zhang En;Yang Huiwei;Lu Guoyun(College of Architecture and Civil Engineering,Taiyuan University of Technology,030024,Taiyuan,China;Shanxi Key Lab of Material Strength &Structural Impact,Taiyuan University of Technology,030024,Taiyuan,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2018年第6期1273-1279,1420,共8页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(11372209)
关键词
砌体结构
单片墙
LS-DYNA
接触算法
抗剪承载力
滞回性能
masonry structure
masonry panel
LS-DYNA
contact method
resistance shearing capacity
hysteretic behavior
