平面载荷作用下小型砼空心砌块砌体的破坏机理

在平面荷载作用下,小型砼空心砌块砌体的破坏分为三个简单模式:砌体内的灰缝滑移,砌块和灰缝开裂,以及砌体沿中面散裂·对每一种破坏模式提出了一相应的破坏准则,并且滑移与摩擦有关,表明了抗剪强度与正应力之间存在非线性关系,修正了MohrCoulomb本构关系;还说明了开裂与最大拉应变有关,散裂与最大压应力有关,并阐述了砌块砌体的破坏机理·

Failure Mechanism for Masonry Panels with Small-Size Concrete Hollow Blocks Under In-Plane Loading

Failure of masonry panels with small size concrete hollow blocks under in plane loading can be attributed to three simple modes:slipping of mortar joints,cracking of concrete blocks and splitting of mortar joints,and middle plane spalling. The failure criterion was discussed for each collapse mode. It is shown that frictional law is associated with the slipping and the shear strength depends nonlinearly on normal stress. These were used to modify Mohr Coulomb criterion of intrinsic curve. It also shows that splitting is associated with the maximum tensile strain and spalling is related to the maximum compressive stress. Finally,the failure mechanism for masonry panels with concrete blocks was analysed.