The Whittier Narrows, California Earthquake of October 1, 1987—Evaluation of Strengthened and Unstrengthened Unreinforced Masonry in Los Angeles City

1988 ◽  
Vol 4 (1) ◽  
pp. 157-180 ◽  
Author(s):  
K. Deppe
Keyword(s):  
Los Angeles ◽  
Unreinforced Masonry ◽  
Code Design ◽  
Masonry Buildings ◽  
Design Standards ◽  
Clear Cut ◽  
Low Probability ◽  
Observed Damage ◽  
Primary Basis ◽  
The City

On November 15, 1987, the City of Los Angeles' Earthquake Division, launched a study of the performance of its strengthened unreinforced masonry buildings during the Whittier Narrows Earthquake. The objective of the study was twofold: (1) To analyze the damage to unstrengthened as well as to strengthened and tension-anchored-only buildings, and from that analysis (2) to determine the most effective ways of improving the design standards for strengthening unreinforced masonry buildings. The initial part of that objective has been completed, and the findings of that study are the primary basis for this article. Observed damage demonstrated a clear-cut need to improve certain aspects of the Code design standards for strengthened buildings; more importantly, however, it sent out warning signals to owners of unstrengthened buildings and only to a slightly lesser extent to owners of tensioned-anchors-only buildings, of the very serious need to fully strengthen their buildings and to improve on the low probability of those buildings surviving a major earthquake. The second part of the study's objective will require additional work, and the combined effort of the City of Los Angeles and the SEAOSC.

The Whittier Narrows, California Earthquake of October 1, 1987—Preliminary Evaluation of the Performance of Strengthened Unreinforced Masonry Buildings

1988 ◽  
Vol 4 (1) ◽  
pp. 197-212 ◽  
Author(s):  
T. A. Moore ◽  
J. H. Kobzeff ◽  
J. Diri ◽  
C. Arnold
Keyword(s):  
Los Angeles ◽  
Case Studies ◽  
Unreinforced Masonry ◽  
Preliminary Evaluation ◽  
Masonry Buildings ◽  
Plane Shear ◽  
Hazard Reduction ◽  
Out Of Plane ◽  
Shear Failures ◽  
Bending Failure

This report presents preliminary case studies of the performance of selected unreinforced masonry buildings during the Whittier Narrows Earthquakes. Attention is focused on buildings located in the downtown Los Angeles area which have been rehabilitated to conform with the Los Angeles hazard reduction Ordinance. There was no life loss or major injuries attributed to the response of unreinforced masonry buildings to the earthquakes. However, there was a significant number of both rehabilitated and non-strengthened buildings for which masonry peeled off upper story walls. This was mainly due to separation of the outer whythe of brick, or out-of-plane bending failure, and/or in-plane shear failures of wall piers, particularly at building corners. The falling bricks associated with these failures did present an injury hazard so it is important to investigate economical measures to minimize these hazards in future earthquakes.

Impacts of the Los Angeles Retrofit Ordinance on Residential Buildings

1992 ◽  
Vol 8 (1) ◽  
pp. 79-94 ◽  
Author(s):  
Mary C. Comerio
Keyword(s):  
At Risk ◽  
Los Angeles ◽  
Average Cost ◽  
Residential Buildings ◽  
Residential Building ◽  
Unreinforced Masonry ◽  
Earthquake Hazards ◽  
The City ◽  
Rent Increase ◽  
Housing Units

The Los Angeles Earthquake Hazards Reduction Ordinance, enacted in 1981 required owners of all unreinforced masonry (URM) buildings to comply with retroactive seismic standards. Among the 8100 URM buildings are approximately 1600 residential buildings with 46,000 housing units. As of March 1991, 55% are complete, 13% are in progress, 12% have been demolished and 20% have not complied. Data kept by the city shows the average cost per unit to be about $6000, and the average rent increase for tenants to be $67 per month, a 14-26% increase over pre-retrofit rents. Less than one-third of the owners completing the retrofit have applied for rent increases. Only 6% of the completed buildings have received financing assistance from the city. Two-thirds of the residential building owners appear to be finding the financing to complete the retrofit without assistance from the city but the remaining one-third of the units are at risk because owners are unable or unwilling to undertake the required work. Tenants who were forced to leave demolished or vacated units had difficulty finding replacement housing at affordable rents, and all tenants in downtown neighborhoods have been impacted by increasing rents and lost units. The Los Angeles experience is important for other cities attempting to establish ordinances and prepare policy for assisting building owners and tenants.

Performance of masonry structures during the 1994 Northridge (Los Angeles) earthquake

1995 ◽  
Vol 22 (2) ◽  
pp. 378-402 ◽  
Author(s):  
Michel Bruneau
Keyword(s):  
Los Angeles ◽  
Unreinforced Masonry ◽  
Masonry Building ◽  
Masonry Buildings ◽  
Masonry Structures ◽  
Northridge Earthquake ◽  
Seismic Evaluation ◽  
Masonry Construction ◽  
Reinforced Masonry ◽  
The Impact

The surface magnitude 6.8 Northridge earthquake which struck the Los Angeles area on January 17, 1994, damaged a large number of engineered buildings, of nearly all construction types. As earthquakes of at least similar strength are expected to occur in most of eastern and western Canada, the study of the effects of this earthquake is of particular significance to Canada. This paper, as part of a concerted multi-paper reporting effort, concentrates on the damage suffered by masonry buildings during this earthquake, and explains why the various types of observed failures occurred. The seismic performance of all masonry construction similar to that commonly found in Canada is reviewed, but a particular emphasis is placed on providing an overview of damage to unreinforced masonry structures which had been rehabilitated before this earthquake. To provide a better appreciation of the impact of this earthquake on masonry buildings, and a better assessment of the engineering significance of their damage in a Canadian perspective, this paper first reviews the evolution of building code requirements for unreinforced masonry buildings up to the seismic retrofit ordinances enacted prior to this earthquake. Examples of various damage types, as observed by the author during his reconnaissance visit to the stricken area, are then presented, along with technically substantiated descriptions of the causes for this damage, and cross-references to relevant clauses from Canadian standards and codes, as well as the recently published Canadian Guidelines for the Seismic Evaluation of Existing Buildings, whenever appropriate. Key words: earthquake, unreinforced masonry, seismic rehabilitation, retrofit, retrofitted masonry building, reinforced masonry, buildings, failure, collapse, heritage buildings.

Utopian Visions in United States Urbanism

Moreana ◽  
2005 ◽  
Vol 42 (Number 164) (4) ◽  
pp. 157-186
Author(s):  
James M. McCutcheon
Keyword(s):  
United States ◽  
Los Angeles ◽  
New World ◽  
New Technology ◽  
World's Fair ◽  
Open Spaces ◽  
Central Park ◽  
Garden Cities ◽  
Oneida Community ◽  
The City

America’s appeal to Utopian visionaries is best illustrated by the Oneida Community, and by Etienne Cabet’s experiment (Moreana 31/215 f and 43/71 f). A Messianic spirit was a determinant in the Puritans’ crossing the Atlantic. The Edenic appeal of the vast lands in a New World to migrants in a crowded Europe is obvious. This article documents the ambition of urbanists to preserve that rural quality after the mushrooming of towns: the largest proved exemplary in bringing the country into the city. New York’s Central Park was emulated by the open spaces on the grounds of the Chicago World’s Fair of 1893. The garden-cities surrounding London also provided inspiration, as did the avenues by which Georges Haussmann made Paris into a tourist mecca, and Pierre L’Enfant’s designs for the nation’s capital. The author concentrates on two growing cities of the twentieth century, Los Angeles and Honolulu. His detailed analysis shows politicians often slow to implement the bold and costly plans of designers whose ambition was to use the new technology in order to vie with the splendor of the natural sites and create the “City Beautiful.” Some titles in the bibliography show the hopes of those dreamers to have been tempered by fears of “supersize” or similar drawbacks.

Los Angeles in the 1930sThe WPA Guide to the City of Angels

2011 ◽  
Author(s):  
Federal Writers Project of the Works ◽  
David Kipen
Keyword(s):  
Los Angeles ◽  
The City

Review: Urban Latino Cultures: La Vida Latina en LA by Gustavo Leclerc, Raúl Villa, and Michael J. Dear (eds.)

1999 ◽  
Vol 22 (1) ◽  
pp. 126-128
Author(s):  
Catherine S. Ramirez
Keyword(s):  
Twentieth Century ◽  
Los Angeles ◽  
Mexican American ◽  
History Of ◽  
Crime Wave ◽  
Eighteenth And Nineteenth Centuries ◽  
The City ◽  
History Of Los Angeles

Throughout the twentieth century (and now the twenty-first), the specter of a Latina/o past, present, and future has haunted the myth of Los Angeles as a sunny, bucolic paradise. At the same time it has loomed behind narratives of the city as a dystopic, urban nightmare. In the 1940s Carey McWilliams pointed to the fabrication of a “Spanish fantasy heritage” that made Los Angeles the bygone home of fair señoritas, genteel caballeros and benevolent mission padres. Meanwhile, the dominant Angeleno press invented a “zoot” (read Mexican-American) crime wave. Unlike the aristocratic, European Californias/os of lore, the Mexican/American “gangsters” of the 1940s were described as racial mongrels. What's more, the newspapers explicitly identified them as the sons and daughters of immigrants-thus eliding any link they may have had to the Californias/os of the eighteenth and nineteenth centuries or to the history of Los Angeles in general.

Városutópiák környezetpszichológiai és szimbolikai elemzése

2003 ◽  
Vol 58 (4) ◽  
pp. 431-472 ◽  
Author(s):  
Edit Lippai ◽  
Andrea Dúll
Keyword(s):  
Los Angeles ◽  
Jersey City ◽  
The City

A városépítészet egész történetét végigkísérik a „Jó város - jó társadalom” elképzelések, vagyis az utópiák. A jelen tanulmányban néhány, a szépirodalomban megjelent ideális, tökéletes, kívánt városelképzelést, vagyis eutópiát elemzünk környezetpszichológiai és szimbolikai szempontból. A városok tényleges téri-társadalmi szerkezetének és folyamatainak, valamint ezek mentális-érzelmi leképezodésének vizsgálata egyidos a környezetpszichológiával. A kutatást Kevin Lynch (1960) úttöro vizsgálatai alapozták meg, amelyeket „A város képe” (The Image of the City) címu klasszikus könyvében publikált. Lynch három amerikai város - Boston, Los Angeles és Jersey City - lakosságának reprezentatív mintáin végzett kutatásában a lakók mentális térképeit vizsgálta. Kutatásának eredményei szerint az emberek fejében él egy kép a városukról (image of the city), ami a városlakó orientációs bázisa és egyúttal esztétikai-formai struktúra. Összehasonlítva a három amerikai városról alkotott mentális térképeket, Lynch rájött, hogy bizonyos környezeti elemek általános térkép-jellegzetességnek tekinthetok: utak (paths), határok (edges), lakónegyedek (districts), csomópontok (nodes), iránypontok (landmarks). Az utópiák három csoportra oszthatók: idobeli (múlt- és a jövobeli), térbeli (négy világtáj irányában, illetve magasban vagy mélyben levo) és abszolút (képzeletbeli) utópiákra. Az általunk elemzett idobeli utópiák: Atlantisz, Mennyei Jeruzsálem, Minas Tirith és Diaspar, térbeli utópiák: Nekeresd, Napváros, Eldorado és abszolút utópia: Elefántcsonttorony. Ezeket a városutópiákat ebben a munkában kulturális városképeknek tekintettük, és ily módon elemeztük fizikai, észlelheto elemeiket. Vizsgálatunk során arra az érdekes felfedezésre bukkantunk - természetesen Lynch munkájáról nem is tudva -, hogy az utópiák megalkotói pontosan az általuk empirikusan feltárt fenti szempontok alapján írták le információikat az általuk tökéletesnek tartott városról. Elemzésünk eredménye szerint leírhatók a vágyott város ismérvei általában: 1. széles, jó alapanyagból készült sugárutak, 2. jól elkülönített határok és szélek, amelyek védenek, s tagolják a város szerkezetét és 3. a városon belül tágas tereket, kerületeket fognak közre, valamint 4. a csomópontokban a vizuális tájékozódást segíto jellegzetes és látványos tereptárgy van. A városok lakóit többek között közös szimbólumrendszer és a kommunikáció adott, megszokott módja kapcsolja egymáshoz. Az utópikus városok szimbolikus „kognitív térképeinek” funkciója - a valós városokéhoz hasonlóan - az lehet, hogy keretet és biztonságos kapaszkodót nyújtanak egy ideális világban, megteremtik az arról való közös kommunikáció lehetoségét, és ily módon kifejezik, létrehozzák és fenntartják az emberek vágyott tökéletes helykötodését és helyidentitását.

DIALOG Z HUMANIZMEM RENESANSOWYM W DZIEŁACH PIOTRA SKARGI / PIOTR SKARGA’S DIALOGUE WITH RENAISSANCE HUMANISM

2013 ◽  
Vol 54 (4-5) ◽  
pp. 405-424
Author(s):  
Alina Nowicka -Jeżowa
Keyword(s):  
Catholic Church ◽  
Roman Catholic ◽  
Roman Catholic Church ◽  
Ignatian Spirituality ◽  
Clear Cut ◽  
Renaissance Humanism ◽  
Cultural Conditions ◽  
Political Views ◽  
The City ◽  
The Church

Summary The article tries to outline the position of Piotr Skarga in the Jesuit debates about the legacy of humanist Renaissance. The author argues that Skarga was fully committed to the adaptation of humanist and even medieval ideas into the revitalized post-Tridentine Catholicism. Skarga’s aim was to reformulate the humanist worldview, its idea of man, system of values and political views so that they would fit the doctrine of the Roman Catholic church. In effect, though, it meant supplanting the pluralist and open humanist culture by a construct as solidly Catholic as possible. He sifted through, verified, and re-interpreted the humanist material: as a result the humanist myth of the City of the Sun was eclipsed by reminders of the transience of all earthly goods and pursuits; elements of the Greek and Roman tradition were reconnected with the authoritative Biblical account of world history; and man was reinscribed into the theocentric perspective. Skarga brought back the dogmas of the original sin and sanctifying grace, reiterated the importance of asceticism and self-discipline, redefined the ideas of human dignity and freedom, and, in consequence, came up with a clear-cut, integrist view of the meaning and goal of the good life as well as the proper mission of the citizen and the nation. The polemical edge of Piotr Skarga’s cultural project was aimed both at Protestantism and the Erasmian tendency within the Catholic church. While strongly coloured by the Ignatian spirituality with its insistence on rigorous discipline, a sense of responsibility for the lives of other people and the culture of the community, and a commitment to the heroic ideal of a miles Christi, taking headon the challenges of the flesh, the world, Satan, and the enemies of the patria and the Church, it also went a long way to adapt the Jesuit model to Poland’s socio-cultural conditions and the mentality of its inhabitants.

Wastewater treatment and risk assessment in ocean outfall evaluations

1998 ◽  
Vol 38 (10) ◽  
pp. 309-316
Author(s):  
William F. Garber
Keyword(s):  
Wastewater Treatment ◽  
Los Angeles ◽  
Energy Use ◽  
Epidemiological Studies ◽  
Environmental Risks ◽  
Advanced Treatment ◽  
Negative Effect ◽  
Ocean Outfall ◽  
Treatment And Disposal ◽  
The City

Past evaluations of the success of wastewater treatment and submarine outfall placement and operation have considered only a limited number of parameters affecting the marine and onshore environments. Important questions regarding the best allocation of available funds have not been adequately addressed. The relative contamination of the sea from airborne and landwash contaminants has not been considered. Neither has the increased air pollution deriving from the energy required for advanced treatment. Similarly, regular epidemiological studies to evaluate actual changes in morbidity arising from drastic changes in treatment and disposal have not been made prior to very large committments of funds. Most importantly, little attention has been given to the relative ranking of all environmental risks within a catchment area. The net result is that, when all factors are considered, the very large expenditures and increased energy use for sanitary wastewater treatment and outfall disposal will have a net negative effect on the physical and societal environment. The City of Los Angeles and the Los Angeles Metropolitan area can be used to illustrate this probability.

The New Age for Sewer Planning at the City of Los Angeles

2015 ◽  
Vol 2015 (12) ◽  
pp. 1353-1359
Author(s):  
Mario Dimzon ◽  
Fernando Gonzalez ◽  
Ali Poosti ◽  
Adel Hagekhalil ◽  
Erick Heath ◽  
...  
Keyword(s):  
Los Angeles ◽  
New Age ◽  
The City
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