The Applied Technology Council is adapting PEER's performance-based earthquake engineering methodology to professional practice. methodology's damage-analysis stage uses fragility functions calculate the probability of damage facility components given force, deformation, or other demand parameter (EDP) which each subjected. This paper introduces a set procedures for creating from various kinds data: (A) actual EDP at specimen failed; (B) bounding EDP, in some specimens failed and one knows...

The development of high-performance electrochemical energy storage and conversion devices, including supercapacitors, lithium-ion batteries, fuel cells, is an important step on the road to alternative technologies. Carbon-containing nanomaterials (CCNMs), defined here as pure carbon materials carbon/metal (oxide, hydroxide) hybrids with structural features nanometer scale, show potential application in such devices. Because their pronounced activity, high chemical thermal stability low cost,...

A landmark experimental program was conducted to advance the understanding of nonstructural system performance during earthquakes. The centerpiece this effort involved shake table testing a full-scale five-story reinforced concrete building furnished with broad variety components and systems (NCSs) including complete operable egress, mechanical electrical systems, facades, architectural layouts. building-NCS subjected suite earthquake motions increasing intensity, while base-isolated then...

This paper describes the mechanical operation and presents parametric studies for Energy Dissipating Restraint (EDR). The EDR is a strongly self-centering passive friction-based seismic energy dissipator with wide range of hysteretic behaviors. In behaviors most interest in design, slip load proportional to displacement. Typically would be installed building as part bracing system which resists seismically induced lateral forces.

Nonstructural components and systems (NCSs) provide little to no load bearing capacity a building; however, they are essential support its operability. As result, 75–85% of the initial building financial investment is associated with these elements. The vulnerability NCSs even during low intensity earthquakes repeatedly exposed, resulting in large economic losses, disruption functionality, concerns for life safety. This paper describes classifies damage observed landmark shake table tests...

Thermally reversible organogels, comprised of a variety organic liquids and low concentrations relatively molecular mass aza analogues previously investigated ALS (i.e., aromatic linker steroid) molecules have been investigated. The aza-ALS gelators are derivatives 3β-cholesteryl 4-(2-anthrylamino)butanoate (CAAB) 5α-cholestan-3β-yl aryl- or alkylcarbamates. relationship between gelator structure efficiency gelation is explored. packing arrangements the in gel (strands) other phases by...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHypervalent bismuth alkoxide dimer complexes: syntheses, structures, and thermal decompositions of [Bi(OCH(CF3)2)2(.mu.-OCH(CF3)2)(THF)]2 [Bi(OC6F5)2(.mu.-OC6F5)Xn]2.cntdot.zY (X = Y C7H8, n 1, z 1 or 2; X THF, C6H14, 2, 0 1)Carolyn M. Jones, Michael D. Burkart, Robert E. Bachman, Deborah L. Serra, Shiou Jyh Hwu, Kenton H. WhitmireCite this: Inorg. Chem. 1993, 32, 23, 5136–5144Publication Date (Print):November 1993Publication History Published...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFormation of a Novel Luminescent Form Gold(I) Phenylthiolate via Self-Assembly and Decomposition Isonitrilegold(I) ComplexesRobert E. Bachman, Sheri A. Bodolosky-Bettis, Shana C. Glennon, Scott SirchioView Author Information Department Chemistry, Georgetown University Box 571227, Washington, D.C. 20057-1227 Chemistry Biochemistry Maryland, College Park, Maryland 20742 Cite this: J. Am. Chem. Soc. 2000, 122, 29, 7146–7147Publication Date...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe Structural and Functional Equivalence of Aurophilic Hydrogen Bonding: Evidence for the First Examples Rotator Phases Induced by BondingRobert E. Bachman, Michael S. Fioritto, Susan K. Fetics, T. Matthew CockerView Author Information Department Chemistry, Georgetown University Box 571227, Washington, D.C. 20057-1227 Cite this: J. Am. Chem. Soc. 2001, 123, 22, 5376–5377Publication Date (Web):May 11, 2001Publication History Received19...

[Pd(bpy)(bdt)], 2 (bpy = 2,2'-bipyridine, bdt 1,2-benzenedithiolate), was prepared in good yield by the reaction of bdtNa2 with [(bpy)PdCl2] DMSO. The analogous nickel complex, 1, a similar using MeOH/CH2Cl2 and [(bpy)NiCl2·dmf]2. Both 1 (a 7.9920(1) Å, b 11.4385(1) c 16.1415(1) β 103.327(1)°, V 1435.86(2) Å3, Z 4) 8.1631(5) 11.4379(7) 16.2475(10) 103.7010(10)°, 1473.84(12) crystallize monoclinic space group P21/c are isostructural their previously reported platinum analogue. In accord...

Reaction of AgBF(4) with 2 equiv Ph(3)P in acetonitrile followed by recrystallization from dichloromethane/hexane yields the mixed phosphine-nitrile complex [(Ph(3)P)(2)AgNCCH(3)]BF(4) (I) as its dichloromethane solvate, I.0.5CH(2)Cl(2). This solvate crystallizes monoclinic space group C2/c a = 22.928(5), b 12.700(3), c 25.156(5) Å, beta 97.53(3) degrees, and Z 8. The ligand I is loosely bound to metal center easily lost, even solid state, without decomposition. Hence, dried samples...

Reaction of HAuCl4 x 3 H2O with excess HSAr (Ar = C6F5 or C6F4H) in ethanol, followed by addition [Et4N]Cl, produced [Et4N][Au(SAr)4] (1a) C6F4H (1b)) as red crystalline solids high yield. These complexes are rare examples homoleptic gold(III) thiolate complexes. The crystal structures 1 show square planar geometry at the gold center elongated Au-S bonds. Both undergo reversible reductive elimination/oxidative processes solution via thermal and photochemical pathways. Equilibrium constant...

We analyzed experimentally and by calculations the crystal packing of eight ammonium phosphonium halide salts, each with four equivalent n-alkyl chains containing 10−18 carbon atoms. All salts crystallize as stacked monolayers an "ionic plane" consisting array anions positively charged N or P atoms in middle layer. The alkyl molecule adopt either a biradial tetraradial shape. In are paired pair is projected on opposite sides ionic plane. case, unpaired take shape crude tetrahedron. There...

The formation of adducts involving the bidentate Lewis acid 1,2-bis(chloromercurio)tetrafluorobenzene (1) and small electron rich organic molecules has been investigated. Compound 1 does not form stable with aliphatic aldehydes can be crystallized in base-free from acetaldehyde. X-ray crystal structure reveals existence a highly cross-linked supramolecular which individual are associated by Hg···Cl Hg···F interactions. By contrast, forms an adduct (2) benzaldehyde. In this adduct,...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Synthesis and Characterization of a Series Iron Carbonyl Clusters Containing Selenium TelluriumRobert E. Bachman Kenton H. WhitmireCite this: Inorg. Chem. 1994, 33, 12, 2527–2533Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi/10.1021/ic00090a010https://doi.org/10.1021/ic00090a010research-articleACS PublicationsRequest reuse permissionsArticle...

The heteropolyanion [PW11O39RhCl]5- (1-Cl) was synthesized by hydrothermal reaction of [PW11O39]7- and RhCl3 at 150 °C for 20 h. tetramethylammonium salt 1-Cl characterized elemental analysis, 31P 183W NMR, solution molecular weight determination ultracentrifugation (found 2744 ± 63, calcd 2816). cyclic voltammogram shows an irreversible reduction wave −0.45 V vs Ag/AgCl, controlled potential −0.5 generates the dimeric metal−metal bonded species [(PW11O39Rh)2]10- (2). composition structure 2...

Abstract The condensation of bis( o ‐formylphenyl) selenide with 1,2‐diaminoethane or 1,3‐diaminopropane yielded the new macrocyclic ligands 1 and 2 in very good yields. Crystals are monoclinic, space group P / c a = 10.0648(10) Å, b 37.390(4) 8.0073(11) Z 4 those triclinic, $\bar {1}$ 7.200(3), 9.137(3), 12.780(6) 1. coordination chemistry has been studied “soft” metal ion Pd II “hard” ions Ni Co . Reaction [PdCl (COD)] mol‐equiv. refluxing methanol addition NH PF 6 afforded complexes 5 ,...

ADVERTISEMENT RETURN TO ISSUEPREVArticleReduction of tellurium by Na2[Fe(CO)4]: synthesis and reactivity [PPN]2[Fe2(CO)6(Te2)2]Robert E. Bachman Kenton H. WhitmireCite this: Organometallics 1993, 12, 5, 1988–1992Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 1993https://pubs.acs.org/doi/10.1021/om00029a068https://doi.org/10.1021/om00029a068research-articleACS PublicationsRequest reuse permissionsArticle Views168Altmetric-Citations45LEARN...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Charge on Structure: Stepwise Protonation [EFe3(CO)9]2- (E = Se, Te) and Isolation a Novel Mixed-Metal Cluster [TeFe3(CO)9(.mu.-CuCl)]2-Robert E. Bachman, Kenton H. Whitmire, Jaap van HalCite this: Organometallics 1995, 14, 4, 1792–1801Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April...

The reaction of [(Ph3PAu)3O]BF4 with P2(SiMe3)4 in a 2:1 ratio results cleavage the P−P bond and formation pentacoordinate dication [P(AuPPh3)5]2+ moderate yield. Low temperature 31P NMR studies indicate that gold atoms are equivalent solution. However, solid state molecular structure this homoleptic is square pyramidal rather than classically expected trigonal bipyramid.

This paper develops a performance-based seismic design procedure for pallet-type steel storage racks located in areas accessible to the public. Performance objectives consistent with current building code procedures United States are defined. The focuses on collapse prevention of their down-aisle direction under Maximum Considered Earthquake (MCE) ground motions at site. lateral load-resisting systems typically moment frames utilizing special proprietary beam-to-column moment-resisting...

A twin-tailed glutamate-based lipid with a pyridine headgroup was prepared in good yield using standard amide coupling and protection/deprotection chemistry. The resulting Lewis basic gels wide array of hydrocarbon solvents at critical gelation concentration (C(g)) 0.3 wt %. more polar solvents, such as ethanol, THF, dichloromethane, chloroform, occurs C(g) between 2 5 %, demonstrating the importance hydrogen bonding interactions gel formation. this system also demonstrated by IR observation...

With the 2014 update of U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) as a basis, Building Safety Council (BSSC) has updated earthquake ground motion maps in Earthquake Hazards Reduction Program (NEHRP) Recommended Provisions for New Buildings and Other Structures, with partial funding from Federal Emergency Management Agency. Anticipated adoption into American Society Civil Engineers Minimum Design Loads Structures International Residential Codes is underway. Relative...