...Germán A Prieto, M.EERI; Monica D Kohler, M.EERI Coda wave interferometry is applied to data from Community Seismic Network MEMS accelerometers permanently installed on nearly every floor of a 52-story steel moment-and-brace frame building in downtown Los Angeles. Wavefield data from the 2019 M7.1...

...Jessica Thangjitham, M.EERI; Mervyn Kowalsky, M.EERI The steel in reinforced concrete (RC) members that form plastic hinges must possess sufficient strain capacity to dissipate seismic deformation demands. Unfortunately, there is limited information on the seismic strain demands of bridge column...

.... The valley-side structure served as two-way traffic. Both the mountain- and valley-side bridges have superstructures consisting of concrete girder and steel box-girder sections. The second pier from the Gaziantep-side abutments is the transition point of the concrete girder section and the steel girder...

... interspersed with relatively small undulations. Therefore, they will likely give similar component test results to that from a monotonic push because of negligible cyclic degradation due to relatively few large one-direction excursions. The same conclusion was found from study of steel building response...

...Nestor H. Cuevas ABSTRACT Energized vertical steel casings have been developed to excite and monitor changes in the electrical properties of resistivity anomalies associated with hydrocarbon production and CO 2 injection, among other applications. Accordingly, the spatial distribution of the fields...

...Zhidong Zhang; Mohammed M Eladly; Colin A Rogers; Benjamin W Schafer Many monotonic and cyclic tests have been conducted on cold-formed steel framed shear walls in the last 20 years. Cold-formed steel framed shear wall provisions in AISI S240, AISI S400, and ASCE 41 are supported by the data...

... to start this discussion is by looking at the global high- and low-growth periods during the 20 th century ( Fig. 1 ). Fig. 1. Growth rate of steel and copper. Four notes regarding Figure 1 are needed: The figure records average annual demand growth rates for the one mainstream alloy...

...Mohammadtaghi Rahmani; Armin Barjani; Maria I Todorovska The between-event variability in identified shear wave velocities of fitted four-layer beam models in the response of a 54-story steel-frame building during nine earthquakes over a period of 27 years (1992–2019) is investigated. Recorded...

...‐, 9‐, and 20‐story steel moment‐resisting frame structures. The proposed strong‐motion duration accurately estimates nonlinear structural responses. It is proven that the ideal‐pulse‐based strong‐motion duration can adequately describe the intensity of near‐fault ground motions, both from...

...Bruce Maison, M.EERI; Matthew S. Speicher, M.EERI; Dimitrios Lignos, M.EERI A 4-story steel moment-frame building designed according to ASCE 7 was used in a numerical parameter study to assess the effects of modeling features on peak drift demands. Features studied included strength, stiffness...

... and substrates. However, the critical value of oxygen-reduced, which can take into account the cost and corrosion protection requirements, is uncertain. Therefore, the corrosion behavior of N80, J55, and 3Cr steels under simulated high pressure (30 MPa) gas injection with different oxygen content (1%–12% vol...

...Niloufar Behboud, M.EERI; Farzin Zareian, M.EERI; Alireza Rezaeian This article presents the recorded data from an experimental campaign on stiffened steel column bases. The connection configuration comprises an exposed base plate on which vertical stiffeners are welded to strengthen the assembly...

... of well-defined buckling restrained steel braces, which have been extensively tested over many decades now and are currently implemented widely in buildings, to achieve the desired shear and flexural base yielding mechanisms. Nonlinear three-dimensional (3D) models developed in ABAQUS were used...

... building with composite floor systems and steel columns as the gravity system, whereas for Japan, the archetype is designed using a steel moment frame made of square concrete-filled steel tube (CFT) columns and composite beams and installed with oil dampers. Although the design procedures followed...

.... The Japan Prototype Building made of steel moment-resisting frames equipped with oil dampers is 1.5 times stronger in terms of the collapse safety margin than the US Prototype Building made of an reinforced concrete (RC) core shear wall system. The difference between the two buildings is believed to occur...

...Hamidreza Salmasi Javid; Masoud Mohammadgholiha; Siavash Soroushian; Esmaeel Rahmanishamsi; Emmanuel “Manos” Maragakis Fragility curves for steel-framed partition walls in current guidelines (such as FEMA P-58) are mainly based on experimental studies with limited number of geometries. In light...

... buildings had the heaviest structural damage. No structural damage could be observed in steel buildings. The aftershock sequence, which included 7 M5+ and 50 M4+ events, exacerbated structural damage in all types of buildings. The present study is based on the EERI field reconnaissance mission conducted...

...R. Dhana Raju Abstract Iron is the most important of all metals and ~ 98% of it, in the form of iron ore/pellets, is used as the key raw material in making steel, with its per-capita consumption often seen as an Index for a nation’s Prosperity. Salient aspects of the industries of iron ore mining...

... be used in shotcrete, concrete steel set structures, foundations, reinforced multi-layer liners, geotextiles, etc. In this module, the axial force on each liner element can be obtained while a shotcrete liner is applied. The variation in the forces generated in the lining is used as a factor to reflect...

...%. The longitudinal bars were welded to the base steel plates and the boundary steel plates at the bottom and the top of the unit. The transverse reinforcement was D10 hoops (135° hooks) and crossties (180° hooks) at a spacing of 50 mm. The columns in first half of third story in Unit A measured 300 mm × 550 mm...