原文传递
Experimental Study of Shear-Critical Reinforced-Concrete Shear Wails under Tension-Bending Shear-Combined Cyclic Load
| 题名： | Experimental Study of Shear-Critical Reinforced-Concrete Shear Wails under Tension-Bending Shear-Combined Cyclic Load |
| 正文语种： | 英文 |
| 作者： | Xin Nie; Jia-Ji Wang; Mu-Xuan Tao; Jian-Sheng Fan;Y. L. Mo, F.ASCE; Zi-Yu Zhang |
| 作者单位： | Tsinghua Univ;Univ, of Houston |
| 关键词： | Reinforced concrete; Shear wall; Tension-bending-shear; Shear compression; Force transfer mechanism; Axial tension ratio; Shear strength |
| 摘要： | Four shear-critical RC shear walls were tested under a tension-bending-shear load to replicate seismic behavior of the bottom shear wall in high-rise buildings. The axial tension ratio ranged from 0 to 0.5 and the aspect ratio was 1.06. The shear compression failure mode was observed for each specimen, characterized by the formation of an inclined crack at 45° and direct strut action. The shear displacement was a dominant deformation component throughout the loading history. When the axial tension force increased from 0 to 1,293 kN, the ultimate drift ratio increased from 0.90% to 2.38%, while shear capacity linearly decreased from 1,507 to 895 kN. The load-displacement curve showed a significant pinching effect and strength degradation effect. In addition, this paper reports an innovative experimental method to obtain shear resistance of transverse reinforcement (V5) based on the plasticity theory and strain measuring result. Test results using this method show that not all horizontal distributed rebar yield simultaneously at the ultimate capacity. The US code-specified shear strength contribution of horizontal distributed rebar was found to be unsafe for each test specimen. Finally, a database of RC shear walls subject to combined tension-bending-shear load was established to evaluate shear strength formulas in design codes. The comparison showed the Chinese code predicted spuriously higher tension-shear capacity, while the US code predicted conservative capacity. Based on the developed database, a simplified design formula is proposed with adequate safety concerns and accuracy. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.05 |
| 页码： | 04020047 |
相关文献
- Seismic Behavior of Steel Plate Reinforced Concrete Composite Shear Walls under Tension-Bending-Shear Combined Cyclic Load
- Shear Capacity of Reinforced Concrete Subjected to Tension: Experimental Results and Analysis
- Discussion of “A Cyclic Backbone Curve for Shear-Critical Reinforced Concrete Walls” by Siamak Epackachi, Nikhil Sharma, Andrew Whittaker, Ronald O. Hamburger, and Ayse Hortacsu
- Fiber-Section Model with an Exact Shear Strain Profile for Two-Dimensional RC Frame Structures
- Hysteretic Model for Shear-Critical Reinforced Concrete Columns
- Fracture Mechanics-Based Fatigue Life Prediction Method for RC Slabs in Punching Shear Failure Mode
检索历史
应用推荐
