John W. Olver Design Building, University of Massachusetts, USA
In September 2017, the Design Building at the University of Massachusetts in Amherst was completed. The $52 million project is one of the largest timber structures in the USA and one of the largest timber-concrete composite projects in the world.
University of Massachusetts Building Authority,
Boston, MA, USA
Leers Weinzapfel Associates Architects
Boston, MA, USA
Equilibrium Consulting Inc.
Vancouver, BC, Canada
The four-story university building with a floor area of 87,500 ft² includes three schools on the premises of UMass Amherst with offices, studios, lecture halls, and laboratories.
Structure and Design
The building is largely exposed and consists of 5-ply CLT concrete composite floor panels supported by a glulam post and beam structure.
The engineers of Equilibrium Consulting Inc. modeled and analyzed two main building components utilizing RFEM, including the “zipper trusses” with adjacent steel trusses as well as the timber-concrete composite section trusses.
Each zipper truss converges four 9‑inch diameter timber struts and four varying diameter steel bars at a single point to transfer the load back to the upper glulam beams. The 12‑foot-wide trusses vary in span length from 35 feet to 60 feet along with a depth varying between 7 feet and 9 feet.
For the timber-concrete composite section truss design, multiple steel connectors were modeled along the truss length to initiate the composite action between the concrete deck and the glulam timber beam. The timber-concrete composite section truss clear span extends a total length of 25 feet.
The Design Building sets a new standard of quality and performance for institutional timber construction in the USA and demonstrates how state-of-the-art timber construction can meet the demanding performance requirements of large, post-secondary educational facilities.
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3D-Modelle in RFEM: "Zipper Trusses" with Adjacent Steel Trusses (top) and Timber-Concrete Composite Section Trusses with Modeled Steel Connectors (Bottom) (© Equilibrium Consulting Inc.)
Extension of the RF-/STEEL Warping Erosion module | Lateral -torsional buckling analyzes of members according to the second -order theory with 7 degrees of freedom
RFEM/RSTAB add-on module RF-/JOINTS Steel-Tower | Hinged connections of lattice tower members according to EC 3
RFEM/RSTAB add-on module RF-/JOINTS Timber-Timber to Timber | Design of direct timber connections according to Eurocode 5
RFEM/RSTAB Add-on Module RF-IMP/RSIMP | Generation of Geometric Replacement Imperfections and Pre-deformed Replacement Structures
RFEM/RSTAB add-on module RF-/JOINTS Steel-Column Base | Hinged and restrained column bases according to EC 3
RF-/DYNAM Pro - Natural Vibrations Add-on Module for RFEM/RSTAB | Determination of natural frequencies and mode shapes
RF-/DYNAM Pro-Natural Vibrations Add-on Module for RFEM/RSTAB | Determination of Natural Frequencies and Mode Shapes
RF-/PLATE-BUCKLING Add-on Module for RFEM/RSTAB | Plate Buckling Analysis for Plates with or Without Stiffeners According to 1993-1-5
RFEM/RSTAB add-on module RF-/TOWER effective lengths | Determination of effective lengths of lattice towers
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