5,208 articles
Response spectrum
A response spectrum is a plot of the maximum acceleration, velocity, or displacement of damped oscillators excited by an earthquake, and underlies every modern seismic design code.
Response spectrum analysis
Response spectrum analysis, also called the response spectrum method, is a structural dynamics method that estimates a structure's peak seismic response by combining modal responses from an earthquake response spectrum.
Restoring force model
A restoring force model is a mathematical relation between a structural member's restoring force and its deformation, used to represent hysteretic behavior in nonlinear seismic response analysis.
Retaining wall
A retaining wall is a structure built to hold back soil or other material at a difference in elevation, resisting the lateral pressure of the ground behind it.
Retention basin
A retention basin, also known as a retention pond, wet pond, or stormwater management pond, is a pond that permanently holds water and treats urban stormwater runoff.
Retractable bridge
A retractable bridge, also called a thrust or traversing bridge, is a movable bridge whose deck rolls back from the navigation gap rather than lifting, swinging, or curling aside.
Reuben Samuels
Reuben Samuels was an American geotechnical and underground-construction engineer who spent over 30 years at Crimmins Constructors before joining Parsons Brinckerhoff in New York in 1992.
Reverse osmosis
Reverse osmosis is a water purification process in which pressure drives water through a semipermeable membrane while dissolved salts are retained. It is the dominant technology for seawater desalination.
Revetment
A revetment is a sloping facing of erosion-resistant material such as stone or concrete that protects shorelines, riverbanks, and embankments against erosion, lying on the slope itself.
Rhine–Main–Danube Canal
The Rhine–Main–Danube Canal (Main-Donau-Kanal) is a 171-kilometer canal in Bavaria, Germany, built between 1960 and 1992 to link the Main and Danube, completing a 3,500-kilometer waterway from the North Sea to the Black Sea.
Rhode Island State House
The Rhode Island State House is the state capitol in Providence, designed by McKim, Mead & White and built from 1895 to 1904 in white Georgia marble.
Riad (architecture)
A riad (from Arabic riyāḍ, "garden") is a traditional Moroccan courtyard house built around a planted interior garden, typical of the medinas of Marrakech and Fez.
Rialto Bridge
The Rialto Bridge (Ponte di Rialto) is the oldest stone bridge over Venice's Grand Canal, a single white arch designed by Antonio da Ponte and finished in 1591.
Ribblehead Viaduct
Ribblehead Viaduct, officially Batty Moss Viaduct, is a 24-arch railway viaduct in North Yorkshire, England, built 1870 to 1875 for the Settle to Carlisle Railway.
Rice Terraces of the Philippine Cordilleras
The Rice Terraces of the Philippine Cordilleras are living, hand-built rice terraces in the Cordillera mountains of Luzon, Philippines, worked by the Ifugao people and inscribed by UNESCO in 1995.
Richard J. Daley Center
Richard J. Daley Center, originally the Chicago Civic Center, is a 31-story, 648-foot Cor-Ten steel International Style courthouse at 50 W. Washington St., Chicago, completed 1965, designed by Jacques Brownson of C.F. Murphy Associates, home of the Cook County courts and the 1967 Picasso sculpture.
Richard J. Robbins
Richard James Robbins (1933–2019) was an American engineer who led The Robbins Company for 35 years, refined the tunnel boring machine, and held 67 patents.
Richard L. Tomasetti
Richard L. Tomasetti is an American structural engineer who co-founded Thornton Tomasetti, chaired it until 2007, and led the engineering of Taipei 101 and the Petronas Towers.
Richard Norman Shaw
Richard Norman Shaw (1831–1912) was a British architect who led the English Domestic Revival and popularized the Queen Anne style, designing Bedford Park and New Scotland Yard.
Richard Padovan
Richard Padovan (born 1935) is a British architect, teacher, and writer on architectural proportion, known for the Padovan sequence and his books on Dom Hans van der Laan.
Richard Redmayne
Sir Richard Augustine Studdert Redmayne (1865–1955) was a British mining engineer, the UK's first Chief Inspector of Mines, who led the 1913 Senghenydd disaster inquiry.
Richard Rogers
Richard Rogers, Baron Rogers of Riverside (1933–2021), British Pritzker-winning high-tech architect of the Centre Pompidou with Renzo Piano, Lloyd's of London, the Millennium Dome, and Barajas T4; chaired the UK Urban Task Force.
Richmond Palace
Richmond Palace, formerly Shene, was a royal residence on the Thames at Richmond, rebuilt by Henry VII after a 1497 fire and demolished in the 1650s.
Richmond–San Rafael Bridge
The Richmond–San Rafael Bridge, officially the John F. McCarthy Memorial Bridge, is a double-deck cantilever toll bridge carrying Interstate 580 between Richmond and San Rafael, opened in 1956.
Rideau Canal
The Rideau Canal is a 202 km waterway in eastern Ontario linking Ottawa to Kingston, built between 1826 and 1832 under Lieutenant-Colonel John By and now a UNESCO World Heritage Site.
Rideau Street McDonald's
The Rideau Street McDonald's, known as the Rideau McDonald's, was an Ottawa restaurant at 99 Rideau Street, infamous as the "world's worst McDonald's" before closing in 2023.
Rietveld Schröderhuis (Rietveld Schröder House)
The Rietveld Schröder House is a 1924 De Stijl house in Utrecht, Netherlands, designed by Gerrit Rietveld and added to the UNESCO World Heritage List in 2000.
Rievaulx Abbey
Rievaulx Abbey is the ruin of a medieval Cistercian monastery in the River Rye valley near Helmsley, North Yorkshire, founded in 1132 and dissolved by Henry VIII in 1538.
Riggs Bank
Riggs Bank (Riggs National Bank of Washington, D.C.), 1840-2005 Washington bank known as the Bank of Presidents; served 23 presidents and 95 percent of DC embassies; headquarters now the Riggs Washington DC hotel.
Rijksbouwbesluit
The Rijksbouwbesluit is the Dutch national building decree under the Housing Act, which replaced varying municipal bylaws in 1992 with uniform performance requirements and was succeeded by the Bbl in 2024.