论文部分内容阅读
通过对1片双钢板-混凝土组合筒体剪力墙的单调静力试验,研究了该类墙体的破坏特点和力学性能,分析了其剪切变形、腹侧墙和翼墙的剪力滞后现象以及腹侧墙的主应变方向等。试验结果表明:筒体剪力墙的破坏特点主要表现为腹侧混凝土的斜向开裂和翼墙混凝土的受拉水平裂缝,腹侧斜裂缝与加载方向的夹角接近40°且开展较多,而翼墙受拉水平裂缝开展较少,且主要集中在翼墙与腹侧墙相交位置;筒体剪力墙的受力特点是翼墙主要承受弯矩、腹侧墙主要承受剪力;筒体剪力墙剪切变形引起的水平位移占总水平位移的比例在加载过程中基本维持在70%以上;随着荷载增加,翼墙因剪力滞后造成的应力集中程度逐渐增加,受拉翼墙和受压翼墙在弹性阶段的应力集中系数分别为2.75和1.65;腹侧墙在弹性工作范围内表现出一定的剪力滞后现象;腹侧墙钢板主应变方向与混凝土的开裂方向基本一致,表明钢板与混凝土的变形协调。
Through the monotone static test of a double steel-concrete composite shear wall, the failure characteristics and mechanical properties of the shear wall are studied. The shear deformation, the shear lag of the ventral wall and the wing wall are analyzed Phenomenon and the main strain direction of the ventral wall and so on. The test results show that the failure characteristics of the shear wall mainly include the oblique cracking of the concrete on the ventral side and the horizontal tension of the concrete on the wing wall. The included angle between the diagonal crack on the ventral side and the loading direction is close to 40 °, While the horizontal wall of the wing wall tension less developed, and mainly concentrated in the intersection of the wing wall and ventral wall position; the stress characteristics of the wall shear wall is mainly subjected to bending moment of the wing wall, the ventral wall mainly withstand shear; tube The ratio of the horizontal displacement caused by the shear deformation of the body shear wall to the total horizontal displacement remained above 70% during the loading process. With the increase of the load, the stress concentration caused by the shear lag gradually increased, The stress concentration coefficients of the wall and the compression wing were 2.75 and 1.65 in the elastic phase respectively. The ventral wall showed a certain shear lag in the elastic working range. The main strain direction of the plate in the ventral wall was basically the same as that of the concrete , Indicating that the deformation of steel and concrete coordination.