Preliminary report of investigations of the central Chile earthquake of March 3, 1985

1985 ◽  
Author(s):  
Sylvester Theodore Algermissen
Keyword(s):  
Preliminary Report ◽  
Central Chile ◽  
Chile Earthquake

The Political Economy of Gutswirtschaft: A Comparative Analysis of East Elbian Germany, Egypt, and Chile

1979 ◽  
Vol 21 (4) ◽  
pp. 483-518 ◽  
Author(s):  
Alan Richards
Keyword(s):  
Political Economy ◽  
Latin America ◽  
Comparative Analysis ◽  
Preliminary Report ◽  
Theoretical Framework ◽  
The Political ◽  
Central Chile

In many otherwise diverse societies, owners of large agricultural estates have paid their year-round workers with the use of a piece of land on which to produce their own subsistence crops. In a “preliminary report” Magnus Morner cited some eleven examples of this system in Europe, Latin America, and Africa. Although Mörner mentions different influences, he does not advance an argument to explain these systems. This essay seeks to contribute to our understanding of the political economy of these “labor rent” or “estate labor” systems. The paper is exploratory: previous approaches are considered, a theoretical framework is proposed, and some tentative hypotheses are presented. My evidence comes from three examples: the Insten system of East Elbian Germany from ca. 1750 to ca. 1860; the ‘izbah system of the Egyptian Delta from ca. 1850 to ca. 1940; and the pre-1930 inquilinaje system of Central Chile.

Seismic Rocking Response of a Triangular Building Founded on Sand

1987 ◽  
Vol 3 (4) ◽  
pp. 793-809 ◽  
Author(s):  
G. Bongiovanni ◽  
M. Celebi ◽  
E. Safak
Keyword(s):  
System Identification ◽  
Free Vibration ◽  
Mathematical Models ◽  
Excellent Performance ◽  
Central Chile ◽  
Concrete Building ◽  
Chile Earthquake ◽  
Modes Of Vibration ◽  
Vibration Tests ◽  
Identification Techniques

A twenty-two story, triangular in plan, symmetrical, reinforced concrete building on the beachfront in Vin~a del Mar, Chile, was temporarily instrumented in August 1985 following the 3 March 1985 Central Chile earthquake ( Ms = 7.8) and aftershocks were recorded. Ambient and free vibration tests were also performed. The paper reports studies of the records of the responses of the building, the primary modes of vibration of the structure, its excellent performance during the earthquake and results from analyses using mathematical models and system identification techniques.

Dual seismogenic behavior: The 1985 Central Chile Earthquake

1995 ◽  
Vol 22 (24) ◽  
pp. 3541-3544 ◽  
Author(s):  
Sergio E. Barrientos
Keyword(s):  
Central Chile ◽  
Chile Earthquake

The 1985 Central Chile Earthquake: A Repeat of Previous Great Earthquakes in the Region?

Science ◽  
1986 ◽  
Vol 233 (4762) ◽  
pp. 449-453 ◽  
Author(s):  
D. COMTE ◽  
A. EISENBERG ◽  
E. LORCA ◽  
M. PARDO ◽  
L. PONCE ◽  
...  
Keyword(s):  
Central Chile ◽  
Great Earthquakes ◽  
Chile Earthquake

Slip distribution of the 1985 Central Chile earthquake

1988 ◽  
Vol 145 (3-4) ◽  
pp. 225-241 ◽  
Author(s):  
Sergio E. Barrientos
Keyword(s):  
Slip Distribution ◽  
Central Chile ◽  
Chile Earthquake

Topographical and geological amplifications determined from strong-motion and aftershock records of the 3 March 1985 Chile earthquake

1987 ◽  
Vol 77 (4) ◽  
pp. 1147-1167
Author(s):  
M. Çelebi
Keyword(s):  
Site Response ◽  
Strong Motion ◽  
Spectral Ratios ◽  
Data Set ◽  
Frequency Dependent ◽  
Central Chile ◽  
Strong Motion Records ◽  
Chile Earthquake ◽  
Populated Region ◽  
Geological Formations

Abstract Site-response experiments were performed 5 months after the MS = 7.8 central Chile earthquake of 3 March 1985 to identify amplification due to topography and geology. Topographical amplification at Canal Beagle, a subdivision of Viña del Mar, was hypothesized immediately after the main event, when extensive damage was observed on the ridges of Canal Beagle. Using frequency-dependent spectral ratios of aftershock data obtained from a temporarily established dense array, it is shown that there is substantial amplification of motions at the ridges of Canal Beagle. The data set constitutes the first such set depicting topographical amplification at a heavily populated region and correlates well with the damage distribution observed during the main event. Dense arrays established in Viña del Mar also yielded extensive data which are quantified to show that, in the range of frequencies of engineering interest, there was substantial amplification at different sites of different geological formations. To substantiate this, spectral ratios developed from the strong-motion records of the main event are used to show the extensive degree of amplification at an alluvial site as compared to a rock site. Similarly, spectral ratios developed from aftershocks recorded at comparable stations qualitatively confirm that the frequency ranges for which the amplification of motions occur are quite similar to those from strong-motion records. In case of weak motions, the denser arrays established temporarily as described herein can be used to identify the frequency ranges for which amplification occurs, to quantify the degree of frequency-dependent amplification and used in microzonation of closely spaced localities.

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