http://yetl.yabesh.ir/yetl1/handle/yetl/19029 Wed, 24 Jun 2026 15:59:13 GMT 2026-06-24T15:59:13Z http://localhost:80/yetl1/bitstream/id/184312/ http://yetl.yabesh.ir/yetl1/handle/yetl/19029 http://yetl.yabesh.ir/yetl1/handle/yetl/4310068 Hybrid Simulation Tests of Real-Scale Squat Reinforced Concrete Shear Wall Specimens Diego Pizarro; Milan Kovarbašić; Božidar Stojadinović Squat reinforced concrete shear walls usually have diagonal shear– or sliding shear–controlled behavior. Due to the lack of experimental data, there is uncertainty on how squat wall design parameters define their behavior modes. Two real-scale tests were conducted at ETH Zurich on specimens of equal geometry and reinforcement, but different axial load ratios (ALR), employing hybrid simulation techniques to apply recorded ground-motion excitation in a quasi-dynamic manner. Specimen HSW01 had an ALR of 4.02%, whereas the ALR for Specimen HSW02 was 8%. Specimen HSW01 failed in sliding shear, exhibited a quasi-ductile behavior, developed a peak resistance of 2,730 kN, and reached a displacement corresponding to a 3% drift ratio without losing the ability to carry its axial load. Specimen HSW02 failed in shear diagonal compression and lost the ability to carry its axial load at a horizontal displacement corresponding to a 2% drift ratio and a peak resistance of 3,360 kN. The crack patterns, crack width, and damage progression observed in both tests are presented. Finally, the results were compared with similar specimens tested using a displacement-driven incremental symmetric quasi-static cyclic test protocol. Hybrid simulations using recorded ground-motion excitation did not affect the failure mode of the specimens but allowed them to sustain larger displacements than those tested cyclically. Wed, 01 Jan 2025 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4310068 2025-01-01T00:00:00Z http://yetl.yabesh.ir/yetl1/handle/yetl/4310067 Cyclic Tests Performed on Real-Scale Squat Reinforced Concrete Shear Walls: Transition between Diagonal Shear and Sliding Shear Controlled Behavior Modes Diego Pizarro; Milan Kovarbašić; Božidar Stojadinović Squat reinforced concrete shear walls are commonly used as primary gravity and lateral load–resisting systems in structures. Such low aspect ratio walls respond to load in diagonal or sliding shear. A series of real-scale quasi-static cyclic shear wall tests with identical geometry were conducted at the Multi-Axial Subassemblage Testing (MAST) facility at ETH Zürich to identify the influence of the axial load ratio and the steel reinforcement ratios on the transition between diagonal shear and sliding shear controlled behavior modes. Two specimens failed in sliding shear, and the other two failed in shear, either in diagonal compression or diagonal tension. The tests showed that squat walls exhibiting a sliding shear failure remain stable under the applied axial load even at displacements corresponding to 2% drift ratio. On the other hand, the walls that failed in diagonal shear did so in a brittle manner at displacements corresponding to 1% drift ratio. However, walls that slid had large residual displacements. The values of the shear wall axial load ratio and the longitudinal and horizontal reinforcement ratios at the transition between shear and sliding were identified. Wed, 01 Jan 2025 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4310067 2025-01-01T00:00:00Z http://yetl.yabesh.ir/yetl1/handle/yetl/4310066 Influence of Doors on the In-Plane Seismic Behavior of Partition Walls Jiantao Huang; Masahiro Kurata Doors and other openings inevitably change the internal force distribution in cold-formed steel-framed gypsum partition walls (hereafter referred to as partition walls) subjected to lateral loading, which affects their seismic behavior. Some studies have evaluated the seismic behavior of partition walls with and without doors, along with other variables, through experiments. Still, research on damage mechanisms remains preliminary, with only qualitative discussions. Existing numerical models of doorless partition walls limit the simulation of partition walls with doors. Therefore, this study examines the influence of doors on the in-plane seismic behavior of partition walls. Quasi-static full-scale tests of partition walls with and without doors are conducted to evaluate the influence of a door alone and to display the deformation and stiffness associated with the door. The damage mechanism encompassing rigid-body motions and deformations is quantitatively evaluated using data from potentiometers and an image-based displacement measurement system. Parametric analysis is performed for a validated numerical model of the partition wall considering the door construction and detailing. The results enable the industry to improve the seismic behavior of partition walls with doors. Wed, 01 Jan 2025 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4310066 2025-01-01T00:00:00Z http://yetl.yabesh.ir/yetl1/handle/yetl/4310064 Fire Testing and Modeling of a Novel Hybrid Timber Floor System Zhiyong Chen; Christian Dagenais; Dorian Tung; Thomas Wu; Mark Gaglione To maximize the amount of carbon-sequestering mass timber and demonstrate the potential for mass timber across a range of building types and scales, DIALOG and EllisDon have developed a hybrid timber floor system (HTFS) that is composed of post-tensioned (PT) concrete beams, cross laminated timber (CLT) panels, and concrete topping connected to each other through self-tapping screws and kerf plates. This paper presents the fire performance of this novel HTFS through a combination of testing and modeling. Two mid-span sectional specimens of HTFS without concrete topping were exposed to the standard fire of CAN/ULC S101. The char depth and char rate of CLT were measured, and the temperature at specific locations were recorded to verify the design and the developed advanced finite element models. Advanced 2D models were developed to investigate the influence of steel properties and the effect from concrete spalling, and the modeling approach adopted in the refined 3D model. The developed models can estimate the char depth with difference less than 5%, and the temperature in reinforcing bars, PT duct, and concrete comparable to the average of the test results. The experimental and simulation results give an insight into the fire performance of this novel HTFS. Wed, 01 Jan 2025 00:00:00 GMT http://yetl.yabesh.ir/yetl1/handle/yetl/4310064 2025-01-01T00:00:00Z