Tests and Analyses of Slotted-In Steel-Plate Connections in Composite Timber Shear Wall Panels

Girhammar, Ulf Arne; Källsner, Bo

doi:10.1155/2017/7259014

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…However, contrary to previous studies, [20][21][22][23] Foliente et al's numerical study 4,26 concluded that TSWs do not impact the hysteretic response of conventional SWs. 4,26,27 In Girhammar et al, 28 an analytical procedure to quantify the tying-down effect of wood-frame TSWs on the loadcarrying capacity of partially anchored conventional wood-frame SWs was proposed, revealing that TSWs can enhance the lateral in-plane load-carrying capacity of SWs. The extent of improvement diminishes with decreasing wall aspect ratio (e.g., up to a 100% increase for SWs with a 1:2 aspect ratio and up to a 32% increase for SWs with a 1:0.5 aspect ratio).…”

Section: Previous Research On the Influence Of Tswsmentioning

confidence: 99%

System effects in T‐shaped timber shear walls: Effects of transverse walls, diaphragms, and axial loading

Valdivieso,

Almazán,

Lopez‐Garcia

et al. 2024

Earthq Engng Struct Dyn

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This paper investigates the effects of transverse shear walls (TSWs), out‐of‐plane bending stiffness of diaphragms (FDIA), and axial loading (AXL) on the lateral response of strong wood‐frame shear walls (SWs) used for multistory light frame timber buildings (LFTBs) located in highly active seismic zones. Experimental tests were conducted to understand the requirements for SW‐to‐TSW connections to achieve desirable TSW effects in non‐planar SWs and to characterize the lateral cyclic response of T‐shaped SW assemblies with and without diaphragms and axial load. Both slotted and screwed connections were evaluated as SW‐to‐TSW connections, and both showed sufficient stiffness and strength to achieve TSW effects. However, the slotted connection is preferred because it has a more ductile failure mode. Tests on T‐shaped SW assemblies with and without diaphragms and axial load revealed that TSWs significantly enhance the lateral stiffness and strength but reduce the deformation capacity with respect to that of planar SWs. FDIA and AXL effects further influence the stiffness and strength, overcoming the limitation of smaller deformation capacity in T‐shaped SWs without diaphragms. Diaphragms also make the T‐shaped SW response more symmetrical and improve the evolution of the secant stiffness, the cumulative dissipated energy, and the equivalent viscous damping over increasing levels of lateral drift. Numerical analyses of a theoretical building model with T‐shaped SWs show significant reductions in lateral drift (up to 46%) and uplift (up to 100%) compared to the case with planar SWs only, emphasizing the importance of considering system effects in the seismic design of LFTBs.

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Section: Previous Research On the Influence Of Tswsmentioning

confidence: 99%

System effects in T‐shaped timber shear walls: Effects of transverse walls, diaphragms, and axial loading

Valdivieso,

Almazán,

Lopez‐Garcia

et al. 2024

Earthq Engng Struct Dyn

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“…Also, considering the possibility of manufacturing parts of this system in the factory and installing it on site, the speed of implementing the system is high and operating costs are reduced to some extent (Kalantari et al 2020). This system is the best alternative in terms of performance and safer in terms of strength and behavior in comparison with concrete shear walls, and it can be used not only in steel structures but also in concrete structures (Girhammar et al 2017). In terms of comparison with bracing systems and in terms of shear stiffness, this system is stiffer than the stiffest bracing systems, and due to the possibility of making openings anywhere, it has the efficiency of all bracing systems in this regard (Wang, M et al 2017) Research results show that the behavior of the system in the plastic environment as well as its energy absorption is better than bracing systems (Hosseinzadeh, L et al 2017) In this system, due to the wide range of materials and connections, the stresses are adjusted much better than in other strong systems, (Hosseinzadeh, L et al 2017) such as moment frames and various types of braces in which the materials are usually bundled and the connections are concentrated and the behavior of the system is especially more suitable in a plastic environment (Zhi, Q et al,2017).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Steel Plate Shear Wall Performance with Different Sections and Arrangements of Stiffeners and its Effect on Project Management during Construction and Improvement of the Building

Jafarian¹,

Jafarian²

2021

revistageintec

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Considering the increase in the current construction process and the future needs of Iran, the necessity to use high-rise buildings for reduction in urbanization costs and optimal use of land will be inevitable in the future. The performance of steel plate shear wall system as a modern global system, which has an effective application in high-rise buildings and also brings economic benefits compared to previous systems, is evaluated in this study. Steel Plate Shear Walls (SPSW) are a new type of system resistant to wind and earthquake lateral loads, which dates back to the 1970s. In this research, eight samples of shear wall with various stiffening arrangements and sections with ST37 and ST52 alloys are modeled. To evaluate the nonlinear dynamic analysis, the samples are subjected to the San Fernando earthquake force and are modeled and analyzed by ABAQUS software based on the finite element theory. The results of analyzing the samples indicate better performance of the system with stiffener in both vertical and horizontal directions. Also, the use of sections with ST52 alloy has improved the performance of the shear wall by approximately 40%.

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Experimental Research on the Load Transfer Mechanism of Tie Plates for 400 km/h High-Speed Turnouts

Wang

Sun²,

Mu³

et al. 2022

Applied Sciences

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Based on the research and development demand of the 400 km/h high-speed turnout, a new type of elastic iron tie plate based on stiffness optimization is proposed. The new elastic iron tie plate is expected to reduce the stiffness unevenness and effectively solve the problems in the use of existing elastic iron tie plates. However, the new plate uses rubber bosses instead of rubber washers. There are certain differences in the force transmission mechanism from the original tie plate because of the change in structure of the new tie plate. In this paper, a series of experiments are designed to quantitatively compare and analyze the overall stiffness characteristics of different tie-plate structures and the differences in bolt force transmission and distribution laws. The main conclusions are as follows. The laws of vertical load transfer and distribution in the new tie plate are remarkably different from those for the original tie plate because of the differences in their structures. Under the rated bolt torque, the force transferred to the upper surface of the tie plate through the rubber boss in the new tie plate is less than that in the original tie-plate structure by 5.18 kN in the assembled state. Further, the new structure also has lower tie plate precompression; hence, the influence on the stiffness characteristics of the tie plate is less than that in the original structure. However, the steel sleeve deflection in the new tie plate is greater than that in the original tie plate; that is, a larger proportion of the bolt preload force is borne by the steel sleeve, thus making the vulcanized rubber under the steel sleeve more vulnerable to shear damage. If put into actual use, the tie plate bolt torque will be somewhat different from the rated torque; because of the difference in the torques coupled with the different vertical load transfer mechanisms between the new and the original tie-plate structures, the precompression and the proportion of the bolt preload force borne by the steel sleeves of the two tie plates will also show different degrees of deviation corresponding to different deviations of the tie plate bolt torque. Therefore, the new tie plate structure needs to be further optimized to make the transfer mechanism of preload force of bolt as consistent with the original tie plate as possible. In addition, the vibration and deformation characteristics and long-term service performance of the new type of plate under the condition of vehicle passing will be studied through a small-scale field trial and systematic dynamic tests.

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Tests and Analyses of Slotted-In Steel-Plate Connections in Composite Timber Shear Wall Panels

Cited by 3 publications

References 6 publications

System effects in T‐shaped timber shear walls: Effects of transverse walls, diaphragms, and axial loading

System effects in T‐shaped timber shear walls: Effects of transverse walls, diaphragms, and axial loading

Evaluation of Steel Plate Shear Wall Performance with Different Sections and Arrangements of Stiffeners and its Effect on Project Management during Construction and Improvement of the Building

Experimental Research on the Load Transfer Mechanism of Tie Plates for 400 km/h High-Speed Turnouts

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