scholarly journals The Recent Earthquakes in Italy

Nature ◽  
1891 ◽  
Vol 44 (1135) ◽  
pp. 293-293
Author(s):  
J. P. O'REILLY
Keyword(s):  
Recent Earthquakes

Failure Analysis Of Buried Gas Pipelines Crossing Seismic Faults

2020 ◽  
Vol 3 (2) ◽  
pp. 781-790
Author(s):  
M. Rizwan Akram ◽  
Ali Yesilyurt ◽  
A.Can. Zulfikar ◽  
F. Göktepe
Keyword(s):  
Ground Deformation ◽  
Warning System ◽  
Strike Slip ◽  
Gas Pipelines ◽  
Steel Pipes ◽  
Seismic Fault ◽  
Fault Parameters ◽  
Dip Angle ◽  
Permanent Ground Deformation ◽  
Recent Earthquakes

Research on buried gas pipelines (BGPs) has taken an important consideration due to their failures in recent earthquakes. In permanent ground deformation (PGD) hazards, seismic faults are considered as one of the major causes of BGPs failure due to accumulation of impermissible tensile strains. In current research, four steel pipes such as X-42, X-52, X-60, and X-70 grades crossing through strike-slip, normal and reverse seismic faults have been investigated. Firstly, failure of BGPs due to change in soil-pipe parameters have been analyzed. Later, effects of seismic fault parameters such as change in dip angle and angle between pipe and fault plane are evaluated. Additionally, effects due to changing pipe class levels are also examined. The results of current study reveal that BGPs can resist until earthquake moment magnitude of 7.0 but fails above this limit under the assumed geotechnical properties of current study. In addition, strike-slip fault can trigger early damage in BGPs than normal and reverse faults. In the last stage, an early warning system is proposed based on the current procedure. 

Notices of recent earthquakes; No. 4

1874 ◽  
Vol s3-7 (40) ◽  
pp. 384-387
Author(s):  
C. G. Rockwood
Keyword(s):  
Recent Earthquakes

scholarly journals Sustainable Measures for Protection of Structures Against Earthquake Induced Liquefaction

2021 ◽  
Author(s):  
Gopal S. P. Madabhushi ◽  
Samy Garcia-Torres
Keyword(s):  
Soil Liquefaction ◽  
Excess Pore Pressure ◽  
Economic Losses ◽  
Element Analysis ◽  
Centrifuge Testing ◽  
Centrifuge Tests ◽  
Liquefiable Soil ◽  
Recent Earthquakes ◽  
Excess Pore Pressures ◽  
Excess Pore

AbstractSoil liquefaction can cause excessive damage to structures as witnessed in many recent earthquakes. The damage to small/medium-sized buildings can lead to excessive death toll and economic losses due to the sheer number of such buildings. Economic and sustainable methods to mitigate liquefaction damage to such buildings are therefore required. In this paper, the use of rubble brick as a material to construct earthquake drains is proposed. The efficacy of these drains to mitigate liquefaction effects was investigated, for the first time to include the effects of the foundations of a structure by using dynamic centrifuge testing. It will be shown that performance of the foundation in terms of its settlement was improved by the rubble brick drains by directly comparing them to the foundation on unimproved, liquefiable ground. The dynamic response in terms of horizontal accelerations and rotations will be compared. The dynamic centrifuge tests also yielded valuable information with regard to the excess pore pressure variation below the foundations both spatially and temporally. Differences of excess pore pressures between the improved and unimproved ground will be compared. Finally, a simplified 3D finite element analysis will be introduced that will be shown to satisfactorily capture the settlement characteristics of the foundation located on liquefiable soil with earthquake drains.

scholarly journals SEISMIC RISK IN GREECE: WHAT RECENT EARTHQUAKES HAVE TAUGHT US

2002 ◽  
Vol 19 (2) ◽  
pp. 99S-111S
Author(s):  
Vassilis LEKIDIS ◽  
Petros DIMITRIU
Keyword(s):  
Seismic Risk ◽  
Recent Earthquakes

scholarly journals The Recent Earthquakes in Iceland

Nature ◽  
1887 ◽  
Vol 37 (948) ◽  
pp. 201-201
Author(s):  
TH. THORODDSEN
Keyword(s):  
Recent Earthquakes

Notices of recent earthquakes

1873 ◽  
Vol s3-6 (31) ◽  
pp. 40-43 ◽  
Author(s):  
C. G. Rockwood
Keyword(s):  
Recent Earthquakes

VI.—On some Recent Earthquakes on the Durham Coast and their Probable Cause

1885 ◽  
Vol 2 (11) ◽  
pp. 513-515
Author(s):  
G. A. Lebour
Keyword(s):  
Recent Earthquakes ◽  
The Town ◽  
Considerable Discussion

Since the latter end of 1883 up to the present time (Sept. 1885) the inhabitants of certain portions of the town of Sunderland have been much disturbed by a series of small but distinctly sensible earth-shakes, which have caused considerable discussion in the local press and elsewhere. These shocks were chiefly felt in that quarter of the town known as the Tunstall Road, but were not absolutely limited to that locality. They were accompanied by rumblings— sometimes dull but often loud—by the rattling of crockery and furniture, and frequently by very distinct shakes of the entire framework of buildings. Often the shocks have, at night, waked up and terrified the sleeping inhabitants.

Notices of recent earthquakes

1873 ◽  
Vol s3-5 (28) ◽  
pp. 260-263 ◽  
Author(s):  
C. G. Rockwood
Keyword(s):  
Recent Earthquakes
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