skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Explore Research Products in the PAR
It may take a few hours for recently added research products to appear in PAR search results.


Title: Experimental and analytical evaluation of the tension capacity of edgewise connected glued-in rods in mass ply panels
The length of mass timber wall panels is a limiting factor in designing taller buildings. Splice designs are needed to maintain panel transportability while transferring shear and moment forces from higher floors to the foundation under lateral loading. One such splice design utilizes structural adhesive to glue threaded steel rods into the ends of wall panels being connected. This paper reports tests of the tension capacity of glued-in rods embedded in Mass Ply Panels (MPP). Twenty glued-in rods were tested under monotonic and cyclic protocols. Embedment depths ranged between 304.8 mm (12 in.) and 812.8 mm (32 in.). Load and displacement were measured during tests to report values per ISO 6891 and an international code council acceptance criteria document. Elastic stiffness, peak capacity, design capacity, and a predictive capacity equation were determined. Results showed a similar stiffness for all embedment depths and a negligible difference between peak capacities from monotonic and cyclic testing. While the data reported is only directly applicable for analysis of the specific MPP and epoxy combination used in the test program, the methodology herein can be utilized for future testing of timber-adhesive glued-in rods.  more » « less
Award ID(s):
2120683
PAR ID:
10571018
Author(s) / Creator(s):
; ; ; ; ;
Publisher / Repository:
Elsevier
Date Published:
Journal Name:
Construction and Building Materials
Volume:
409
Issue:
C
ISSN:
0950-0618
Page Range / eLocation ID:
133853
Subject(s) / Keyword(s):
Glued-in Rod Mass-Ply Panel Tension Capacity Splice Connection
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. ; ; ; ; ; (, 12th National Conference on Earthquake Engineering)
    Mass timber products are gaining popularity in North America as an alternative to traditional construction materials as part of both the gravity and lateral force-resisting system. However, several knowledge gaps still exist in terms of their expected seismic performance and plausible hybridizations with other materials, e.g. steel energy dissipators. This research explores the potential use of wall spine systems consisting of mass ply panels (MPP) and steel buckling-restrained braces (BRBs) as energy dissipators. The proposed BRB-MPP spine assembly makes up the lateral force-resisting system of a three-story mass-timber building segment that will be tested under cyclic quasi-static loading at Oregon State University. The proposed design methodology follows displacement-based design principles to determine the minimum required stiffness to limit inelastic story drift ratios at the design earthquake level. The MPP spine and BRB-to-MPP connections were capacity designed to resist forces transferred by the BRBs at roof drift ratios beyond the risk-targeted Maximum Considered Earthquake (MCER). This design solution provides an interesting alternative for the design of modern mass timber buildings. The results obtained in the experimental campaign will be used to validate the design methodology and the behavior of the innovative structural system. 
    more » « less
  2. ; ; ; ; ; (, World Conference on Timber Engineering (WCTE 2023))
    Mass timber panels are emerging as an innovative alternative for the design of elastic spines due to their high stiffness- and strength-to-weight ratio, among other factors. Recent research has shown that mass timber panels used in conjunction with steel energy dissipators are promising solutions for enhanced seismic performance. However, the available experimental data at the building scale is still minimal, which limits the understanding, adoption, and development of effective seismic design guidelines for these systems. This research addresses this gap through full-scale quasi-static cyclic testing of a three-story mass timber building. Lateral loads are transferred through Mass Ply Panel (MPP) diaphragms to an MPP spine with vertically-oriented unbonded steel buckling-restrained braces (BRBs) as energy dissipating boundary elements in the first story. The only elements designed to dissipate energy in the inelastic range are the BRBs. The building specimen achieved low-structural damage and enhanced-performance goals, being able to reach a 4% roof drift ratio with little loss of strength and stiffness. The proposed pivoting detail was effective in mitigating compressive damage at the wall toe. To support the experimental campaign and future design procedures, a high-fidelity numerical model of the building was developed using OpenSees. 
    more » « less
  3. ; ; ; ; (, Journal of Physics: Conference Series)
    A veneer-based engineered wood product known as Mass Ply Panels (MPP) was recently introduced and certified per ANSI-PRG 320. A full-scale three-story mass timber building structure was constructed and tested at Oregon State University to demonstrate the potential of MPP in the design of resilient, structural lateral force-resisting systems. The building structure comprised MPP diaphragms, laminated veneer lumber (LVL) beams and columns, and an MPP rocking wall design. Two opportunistic vibration tests were performed to charac-terize the dynamic properties of the structure. First, an implosion of a stadium within 600 m of the building location was used as the main excitation source, during which bi-directional horizontal acceleration data were collected for approximately 18 seconds. Second, an ambient vibration test was conducted to collect horizontal acceleration data for one hour. In both tests, sixteen accelerometers were used to measure the response of the structure. Modal features were extracted using an output-only method and compared with the estimates from a finite element model. Lessons learned can be used to inform future modeling efforts of a mass timber building to be tested on the Natural Hazards Engineering Research Infrastructure (NHERI) Experimental Facility at the University of California San Diego high-performance outdoor shake table. 
    more » « less
  4. ; ; ; ; ; (, Springer International Publishing)
    Mass timber buildings are gaining popularity in North America as a sustainable and aesthetic alternative to traditional construction systems. However, several knowledge gaps still exist in terms of their expected seismic performance and plausible hybridizations with other materials, e.g. steel energy dissipators. This research explores the potential use of mass plywood wall panels (MPP) in spine systems using steel buckling-restrained braces (BRBs) as energy dissipators. The proposed BRB-MPP spine assembly makes up the lateral load-resisting system of a three-story mass-timber building segment that will be tested under cyclic quasi-static loading at Oregon State University. The specimen geometry and material properties result in BRBs that are shorter and of smaller core area than in most common steel structural applications. Small BRBs are prone to exhibit a hardened compressive response and fracture due to ultra-low-cycle fatigue when subjected to repeated cycles of large strain amplitude. These issues, along with the limited availability of test data, make small BRBs difficult to model. To support the experimental testing program, a material model with combined kinematic and isotropic hardening is calibrated against the available experimental data for three BRB specimens to estimate the behavior of BRBs of short length (≤3,500 mm [138 in]) and small core area (≤2,600 mm2 [4 in2]), similar to the ones designed for the test specimen. The calibrated model is used to predict the behavior of the BRB-MPP spine experiment. 
    more » « less
  5. ; ; ; ; ; ; (, Designsafe-CI)
    A lateral force resisting system (LFRS) comprised of one eight-foot-wide Mass Ply Panel (MPP) with Buckling-Restrained Braces (BRBs) was attached to the building frame and tested following a cyclic quasi-static loading protocol up to 4% roof drift ratio. This system was designed to pivot about a pinned base, allowing the wall to rotate with minimal flexural restraint, thereby distributing drift demands more uniformly across the building height and reducing crushing damage at the wall base. Under first-mode loading, the system exhibited stable hysteretic behavior with a nearly uniform story drift profile, while second-mode loading revealed near-linear behavior with high stiffness. Experimental results provide valuable insights into the behavior of mass timber seismic lateral force-resisting systems and can be reused to develop and validate design guidelines for their broader implementation in seismic regions. 
    more » « less
  • Citation Formats
  • MLA
  • APA
  • Chicago
  • BibTeX
  • Save / Share this Record
  • Send to Email