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about olivo barbieri

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Os comentários da Zazie ( a Lili Caneças da blogosfera lusitana)
não são bem-vindos a este blogue e, como tal, serão apagados.

ALGUMAS CONSIDERAÇÕES, INOCENTES, SOBRE O NOVO PLANO DE DINAMIZAÇÃO DA BAIXA-CHIADO, A APRESENTAR DIA 22 PELA CÂMARA MUNICIPAL DE LISBOA

Segundo o que foi anunciado, no próximo dia 22 a Câmara Municipal de Lisboa irá apresentar (com pompa e circunstância) a proposta de dinamização da Baixa -Chiado elaborada pela última comissão ( a quarta ou quinta, já lhe perdemos o conto...) nomeada, para o efeito, por Maria José Nogueria Pinto.

Muito se devia discutir quanto ao método escolhido (grupo de "notáveis" versus participação alargada a um vasto leque de especialistas e cidadãos interessados no tema), às propostas já avançadas por alguns membros da comissão (Baixa "recuperada" como centro financeiro, Baixa recuperada como destino de habitação das classes alta e média alta, etc.) ou quanto às considerações de Maria José Nogueira Pinto e seus pares da comissão ("a proposta já conterá todas as respostas a quaisquer perguntas que venham a ser formuladas", segundo palavras de MJNG, ou de Manuel Salgado que indica que o futuro do Quartel do Carmo da GNR poderia ser " um centrode design dada a próximidade do Bairro Alto e do Museu do Design a ser instalado em SantaCatarina", o que, em termos de compreensão do que são hoje as indústrias criativas denota bem a falta de conhecimento que existe na comissão).

Mas tudo isto, parecendo muito, é muito pouco importante.

É que o problema/base da Baixa Pombalina, e sobre o qual e até hoje ainda não ouvimos qualquer declaração de nenhum responsável, é o problema das estrututras do construido.

Os estudos já feitos e publicados, (e a Formiga Bargante só conseguiu obter acesso a alguns deles, mas essa é outra estória...), são aterradores:

There has not been a major quake near Lisbon for the past 250 years, so the lessons learned may have been forgotten. After all, Lisbon still sits on shifting sands, as last year's collapse of a new waterfront subway station attested. Carlos Sousa Oliveira, a seismologist at Lisbon University, worries that today's Lisbon may not be so earthquake-proof. His recent studies of the city's buildings show that renovations carried out on many of the Pombaline structures over the past century - plumbing, electrical wiring and redesign - have compromised the integrity of the timber gaiolas. Recent restoration and remodelling of buildings in the Baixa have been done without a set of strict guidelines and, he says, create serious uncertainties about how well they will withstand an earthquake. The question now is whether the world's first earthquake-proof city will be ready for the next big one.
Resurrecting Lisbon.
By Bruce Stutz
NewScientist.com News Service | 22 October 2005


A survey carried out by the city council, DCEOD (1993), showed that around 80% of the buildings still had the original “gaiola” structure, if the modifications in the shops at the ground level were disregarded. By then, the structure of 12% of the buildings, randomly distributed in the sixty blocks, was totally replaced by reinforced concrete.
accounting for the "block effect" in structural interventions in Lisbon´s old "Pombaline" downtown buindings
v.cóias e silva, paulo b. lourenço, luis f. ramos e carlos g.mesquita

Como exemplos de intervenções que enfraqueceram significativamente a resistência sísmica dos edifícios da Baixa, podem apontar-se os seguintes:
a) - Corte dos pilares ao nivel do piso térreo para abertura de grandes espaços, frequentemente estabelecimentos comerciais. Este tipo de alterações é feito, geralmente, com um reforço que consiste em introduzir uma viga no topo da parede ou pilar que se corta para redestribuir as cargas para elementos adjacentes. Esta solução pode salvaguardar a resistência a cargas verticias, mas enfraquece significativamente a resistência às forças horizontais, na zona da estrutura em que os efeitos dessas forças são mais fortes. O efeito extremamente negativo deste tipo de alterações é comprovado pelo histórico sísmico mundial que está repleto de exemplos que atestam o mau desempenho de edifícios com estas caracteristicas.
in: segurança estrutural da baixa pombalina - mário lopes, rita bento e rafaela cardoso.

Mesmo quando se fala da Baixa em termos de futuro, a sua importância e valor são realçados com base nos mesmos aspectos (culturais, históricos, urbanisticos, etc. - nota FB), raramente se discutindo a existência fisíca da própria Baixa, isto é, a segurança estrutural dos edifícios normalmente não se questiona. No entanto, essa deveria ser uma das preocupações mais básicas, pois sem a perseveração dos edifícios os restantes aspectos não terão interesse em termos de futuro e serão apenas história.
in: segurança estrutural da baixa pombalina - mário lopes, rita bento e rafaela cardoso.

A partir da próxima segunda feira começaremos a publicar textos sobre este assunto.

Entretanto, e por entendermos que este é um tema que deveria interessar a todos, desde já ficam abertas as "páginas" da Formiga Bargante, seja na forma de comentários, textos a inserir no blogue, ou de textos publicados noutros blogues e a que aqui se possam fazer referência sob a forma de link.

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about thomas dworzak

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Os comentários da Zizie ( a Lili Caneças da blogosfera lusitana)
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about polinexi papapetrou

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não são bem-vindos a este blogue e, como tal, serão apagados.

UNCAPTIVE MIND

"All my films, from the first to the most recent ones, are about individuals who can't quite find their bearings, who don't quite know how to live, who don't really know what's right or wrong and are desperately looking." These words do as good a job as any of summing up the career of the Polish director Krzysztof Kieslowski. But if you want to read more about him, see my recent essay ....

LINK

Lie by Lie

IN MEMORIAN

NOVA YORK

CAMBOJA - POL POT

VIETNAM

HOLOCAUSTO

URRS - UCRANIA

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