Hysteretic Response of Metal Connections on Hybrid Cross-Laminated Timber Panels

Mahdavifar, Vahid; Barbosa, André R.; Sinha, Arijit; Muszyński, Lech; Gupta, Rakesh; Pryor, Steven E.

doi:10.1061/(asce)st.1943-541x.0002222

Cited by 21 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study collected 110 sets of shear tests [5,6, for angle bracket connections, including 107 sets of experimental data and 3 sets of numerical simulation data (Additional file 1). The distribution of the dataset is shown in Fig.…”

Section: Description Of Experimental Databasementioning

confidence: 99%

“…The study suggested that it is necessary to put the resistance of the fasteners and the characteristics of the CLT walls into consideration when predicting the shear strength of the angle bracket connection. Mahdavifar et al [6] investigated the influence of various wood densities on the properties of angle bracket joints by conducting shear and uplift experiments on angle bracket connections with two sets of conventional CLT panels and eight sets of hybrid CLT panels. The test findings revealed that if the damage of the screws or bolts penetrated the low-density core layer of the CLT panel, there was a substantial difference in connection efficacy between hybrid and conventional CLT panels.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures

Wu,

Chen,

Xiong

2024

J Wood Sci

View full text Add to dashboard Cite

The construction of structures using cross-laminated timber (CLT) has grown in popularity as a result of its environmentally friendly and high-strength characteristics. The primary function of angle bracket connections is to resist the force of CLT structures under horizontal forces, which is essential to ensure the seismic resilience and ductility of CLT structures. A regression algorithms-driven method for predicting the mechanical performance of angle bracket connections is introduced in this study. As input parameters, the geometric dimensions of the angle bracket connector, the connection method of the connector with the wall and floor slabs, and the properties of the CLT panel are utilized to predict the yield load, the maximal load, the initial stiffness, and the ductility ratio of the angle bracket connection. Prediction models were developed using the collected data from 110 angle bracket experiments, and each prediction model's performance was discussed in depth. Lastly, the permutation importance and SHapley Additive exPlanations (SHAP) value analysis were used to interpret the prediction models. The results showed that the extreme gradient boosting (XGB) algorithm could accurately predict the maximum and yielding load of the angle bracket connection, with R2 reaching 0.968 and 0.939. Furthermore, in predicting the initial stiffness of the angle bracket, the XGB algorithm performed the best with an average ratio of predicted to actual values of 0.985. The results indicated that this study proposed an accurate and efficient method for angle bracket connection to predicting its mechanical properties and confirmed the trustworthiness and feasibility of the prediction models.

show abstract

Section: Description Of Experimental Databasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures

Wu,

Chen,

Xiong

2024

J Wood Sci

View full text Add to dashboard Cite

show abstract

“…One of the comprehensive equation has been proposed by Miranda. His equation includes the effect of fundamental period of structure, soil type, and earthquake ground acceleration [25][26][27][28].…”

Section: S Y Somentioning

confidence: 99%

Seismic Performance Evaluation of Knee and EBF Braced Frames Using Nonlinear Static Analysis

Moshtagh¹,

Saberi²,

Saberi³

2018

IJSEA

View full text Add to dashboard Cite

Earthquake-resistant structure systems should be designed to stand large deformation to absorb and attenuate imposed energy due to an earthquake while providing sufficient stiffness to transfer the forces to the base without collapse. Knee Braced Frames (KBF), which involves added additional diagonal elements to a frame to increase its ability to withstand lateral loads, is suggested by several researches. In this study, the seismic performance of KBFs are evaluated and compared with Eccentric Braced Frames (EBF). Nonlinear static analyses were utilized for seismic evaluation and comparison between the mentioned frame systems. Three steel structures of 5, 10, and 15-story were numerically modeled, and the seismic parameters such as lateral stiffness, inter-story drift, ductility, and response modification factors were calculated for each structure system. It was observed that using KBF systems resulted in a reduction in intersotry drifts compared to EBFs. KBF systems show more stiff responses in comparison with EBFs and they presented much more stiff response by reducing the knee element length. The KBFs have more ductile behavior in comparison with EBFs, although base shear in KBFs is less than EBFs.

show abstract

“…In the early 2000s, the first research studies were conducted to investigate the monotonic and quasi-static mechanical behavior of CLT diaphragm and their corresponding joints in Europe and later in North America (Ceccotti et al 2006;Follesa et al 2010;Hossain et al 2015;Reynolds et al 2017). The vast majority of studies have focused on hold down or bracket connections, which are mostly used in low-rise buildings (Flatscher et al 2014;Gavric et al 2011Gavric et al , 2015aLatour and Rizzano 2015;Mahdavifar et al 2018;Pozza et al 2018;Schneider et al 2013Schneider et al , 2015. Additional studies have investigated CLT shear connections such as SS, HL, BJ, and HL connections were found to exhibit a higher loading capacity and ductility compared to SS connections with the same fastener type, fastener spacing, and CLT species and layers (Sullivan et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Characterization of Monotonic and Cyclic Performance of Cross-Laminated Timber Dowel-Type Connections

2021

View full text Add to dashboard Cite

An immeasurable amount of greenhouse gas emissions during the process of steel purification and concrete production has attracted environmentally friendly engineers' attention to extend and enhance the use of wood as a structural material. During the last two decades, cross-laminated timber (CLT) has emerged as a high-strength engineered wood product to improve resistance and performance of timber structures, and is being used as a replacement for some mid and low-rise commercial buildings made of concrete and steel in the US. Due to the fact that CLT is a relatively new engineered wood product, there is a lack of knowledge on the mechanical behavior of CLT members and connections. The goal of the present study is to characterize the mechanical properties (specifically shear resistance) of three common types of CLT diaphragm connections including surface spline, half lap, and butt joint, and estimate the behavior of those connections in ultimate limit states, such as earthquake loads, and also serviceability limit states. In doing so, an experimental schedule was developed for a total of 56 tests accounting for different test variables including fastener orientation, type, length, and spacing. More specifically, two types of dowel-type fasteners, namely nail and screw, were considered, while the effect of fastener spacing and inclination was considered by changing the spacing of nails and driven angle of screws. The exerted force and displacement were recorded generating hysteresis curves to assess the failure mechanisms, shear modulus of elasticity, ultimate allowable shear strength and displacement, and energy dissipation of the various connections studied. A finite-element model based on elastoplastic behavior of CLT for a half-lap connection was also developed to estimate the shear behavior of this type of connection numerically and compare it with the experimental findings. Finally, the experimental results were used to compute the optimized hysteretic parameters (and their statistics) for the CUREE-SAWS hysteretic model for further adoption in modeling of diaphragm components by practicing engineers and researchers.

show abstract

Hysteretic Response of Metal Connections on Hybrid Cross-Laminated Timber Panels

Cited by 21 publications

References 6 publications

Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures

Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures

Seismic Performance Evaluation of Knee and EBF Braced Frames Using Nonlinear Static Analysis

Experimental and Numerical Characterization of Monotonic and Cyclic Performance of Cross-Laminated Timber Dowel-Type Connections

Contact Info

Product

Resources

About