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- Xie, Lan, et al.
(författare)
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Shear capacity of stud-groove connector in Glulam-concrete composite structure
- 2017
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Ingår i: BioResources. - : North Carolina State University. - 1930-2126. ; 12:3, s. 4690-4706
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Tidskriftsartikel (refereegranskat)abstract
- A timber-concrete composite structure (TCC) is economically and environmentally friendly. One of the key design points of this kind of structure is to ensure the reliability of the shear connectors. The objective of this paper is to study the mechanical property of stud-groove-type connectors and to provide shear capacity equations for stud-groove connectors in timber-concrete composite structures. Based on the Johansen Yield Theory (European Yield Model), some mechanical models and capacity equations for stud-groove-type connectors in timber-concrete structures were studied. Push-out specimens with different parameters (stud diameter, stud length, groove width, and groove depth) were tested to obtain the shear capacity and slip modulus. The experimental strengths were used to validate equations given in the paper. The shear capacity and slip modulus of stud-groove-type connectors was in direct proportion to the diameter of studs and the dimension of the groove. Comparison between the theoretical and the experimental shear strength results showed reasonable agreement. The highlight of this study on shear capacity equations could significantly reduce the push-out tests before investigating the other properties of TCC.
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| 2. |
- Huang, Yanrong, et al.
(författare)
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Efficacy and safety of secukinumab in active rheumatoid arthritis with an inadequate response to tumor necrosis factor inhibitors : a meta-analysis of phase III randomized controlled trials
- 2019
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Ingår i: Clinical Rheumatology. - : Springer Science and Business Media LLC. - 0770-3198 .- 1434-9949. ; 38:10, s. 2765-2776
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: To address the efficacy and safety of secukinumab in comparison with placebo in active rheumatoid arthritis (RA) patients who had an inadequate response to tumor necrosis factor (TNF) inhibitors. Methods: Databases of PubMed, Embase, and Web of Science were searched to identify the relevant randomized controlled trials (RCTs). Risk ratio (RR) and 95% confidence interval (95% CI) were calculated with the Mantel–Haenszel random effects method. Statistical heterogeneity was assessed using the Cochran Q and I 2 tests. Results: A total of 1292 patients from three phase III RCT studies were included. Compared with placebo, secukinumab 150 mg was superior at 24 weeks in terms of ACR20 with RR (1.66, 95% CI 1.33, 2.08; P < 0.0001; I 2 = 0%), ACR50 (1.88, 95% CI 1.29, 2.72; P = 0.0009; I 2 = 0%), and ACR70 (2.15, 95% CI 1.15, 4.02; P = 0.02; I 2 = 0%). Consistent effects were also observed in pooled group of 150 mg and 75 mg secukinumab. For secukinumab 75 mg alone, ACR20 response rate was significantly higher compared with placebo (RR 1.62, 95% CI 1.29, 2.03; P < 0.00001; I 2 = 0%). Although ACR50 and ACR70 response rates showed a favorable trend to be higher, no statistical difference was observed (RR 1.68, 95% CI 0.99, 2.85, P = 0.05, I 2 = 47%; RR 1.81, 95% CI 0.78, 4.21, P = 0.17, I 2 = 34%, respectively). Compared with the placebo group, there was no increased risk of adverse effects (AEs) and serious AEs at 16 weeks in the pooled secukinumab group. Conclusions: In active RA patients with an inadequate response to TNF inhibitors, secukinumab may be a therapeutic option. Secukinumab 150 mg showed significantly better clinical efficacy with no increased risk of AEs and serious AEs compared with placebo. Trial registration: Clinical Trials.gov identifier: NCT01770379, NCT01350804, NCT01377012 Key Points• Secukinumab 150 mg showed significantly better clinical efficacy in active RA patients with an inadequate response to TNF inhibitors.• No increased risk of AEs and serious AEs in secukinumab group compared with placebo.
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