As a gateway to the expansive forty-five acre sanctuary, the Trailhead House offers visitors an opportunity to learn about the area’s woodlands and wildlife. Given the sanctuary’s focus on preserving the natural environment, the...
The discovery of alkali-silica reaction (ASR) in concrete structures at the Seabrook Station Nuclear Power Plant (Seabrook) was first documented case of ASR at any U.S. nuclear facility. The Nuclear Regulatory Commission (NRC) required Seabrook...
The Boston Harbor Island Alliance and the National Park Service wanted the first permanent structure on the Rose Kennedy Greenway to act as a beacon, attracting people to Boston’s Harbor Islands. In collaboration with Utile, SGH designed...
The Nemours Children’s Hospital includes four buildings on a 60-acre campus. The two seven-story, cast-in-place concrete hospital and clinic buildings and two steel-framed, two-story structures for the central energy plant and loading dock/...
Storrow Drive, a parkway along the Charles River in Boston, carries more than 100,000 vehicles per day. The tunnels provide access to city streets, and are constructed of reinforced concrete sections with concrete-slab roofs that are supported by...
Recognizing sports and fitness are important to the campus community, Worcester Polytechnic Institute (WPI) wanted to update its current facilities by constructing a new sports and recreation center. The facility includes a precast concrete...
The 80,000 sq ft building in Chicago’s Fulton Market neighborhood was constructed in the early 1950s as a manufacturing facility. Potential buyers were considering redeveloping the property for use as office space or a data center, and the...
SGH investigated the causes of deteriorating concrete sidewalks at multiple locations in Massachusetts. Deterioration ranged from scaling to surface delaminations.
This seventeen-story structure is one of several architecturally significant, mid-century modernist concrete buildings designed by Josep Lluís Sert for Boston University’s campus. The tower's concrete facade deteriorated over time,...
Now part of Pacific Gas & Electric Company’s (PG&E’s) General Offices, The Matson Shipping Building (215 Market Street) was constructed in 1924 and is listed on the National Register of Historic Places. The seven-story annex...
The building stock of large metropolitan areas comprise buildings of various materials constructed over the course of many years. A significant number of these buildings utilized concrete construction with details drastically different than...
By: Keith Palmer, Pearl Ranchal, Kari Klaboe, Duke Crestfield, Stephen Kadysiewski, Laurence Kornfield, Robert Kraus
Over the years, there has been much focus within California on seismically vulnerable building types, with the ultimate goal being to reduce life safety risks, improve community resiliency, or achieve a balance of both objectives. In San...
The Richter magnitude 6.7 San Fernando Earthquake occurred on the morning of February 9, 1971 in the San Fernando Valley north of the city of Los Angeles. Also known as the Sylmar Earthquake, it caused 65 deaths, 2500 injuries and an estimated $...
Slab design and preparation is critical to a project’s success and requires close attention to both structural and waterproofing concerns during the design process. It is important to understand how different types of concrete slabs are applied to help project teams design and construct the right type of slab for long-term performance.
Despite potential benefits including enhanced mechanical properties, reduced permeability, and decreased environmental impact, higher rates of metakaolin substitution for cement ([10% MK by mass of cement) have been limited practically because of...
By: Neal Anderson, Michael Morrison, Donald F. Meinheit
Anchorage to concrete design provisions were first incorporated into the ACI 318 Code in 20021 as Appendix D. In 2011, the design provisions for adhesively bonded anchors were added to the ACI 318-11 Building Code Requirements for Structural...
By: Neal Anderson, A. Koray Tureyen, Donald F. Meinheit
ABSTRACT
The Precast/Prestressed Concrete Institute (PCI) sponsored a comprehensive research program to assess the capacity of headed-stud group anchorages. The PCI program was initiated in response to significant differences...
ABSTRACT
Edge bearing stresses on shear-loaded anchorages can enhance the shear capacity because of the confining stresses provided by the compressive bearing stress. However, too much bearing stress can have a negative influence on...
Simpson Gumpertz & Heger (SGH) Senior Project Manager Kevin Conroy coauthored an article describing the American Concrete Institute’s (ACI) updated building repair code for existing concrete structures. The...
By: Nancy Varney, David B. Garber, Eulalio Fernández Gómez, Oguzhan Bayrak
Researchers have not extensively studied the behavior of inverted-T (IT) beams experiencing ledge failures. The work described in this paper aims to fill that gap in knowledge by providing data from tests conducted on full-scale IT beams. To the...