The Seismic Shock Prediction Algorithm based on the Rock Mass behaviour data

KGHM S.A. exploits copper ore deposits in underground mining facilities. As a result of this operation the seismic activity of the rock mass is induced. One of the symptoms of seismic activity of the rock mass is the occurrence of high energy seismic shocks. These phenomena can lead to severe destructions in mine workings. Resulting from that is a threat to work safety in the area of seismic shock occurrence and risk of damage to mine's property. Particularly strong seismic shocks may also pose a threat to objects on the surface. The level of seismic activity of the rock mass depends on many factors that can be divided into factors related to the environment in which the operation is carried out and factors related to methods of conducting the operation. In the report authors propose an algorithm for prediction of the occurrence of seismic shocks with a given energy.

Probability Distribution of ADAS Metal Dampers in R.C. Buildings Using Nonlinear Analysis: التوزيع الاحتمالي لمخمدات معدنية من نوع ADAS في المباني البيتونية المسلحة باستخدام التحليل اللاخطي

This study discusses the effect of metallic yielding dampers (ADAS) on the behavior of reinforcement concrete buildings when exposed to seismic shocks. The objective of the study is to reduce the negative impacts on the main structural elements (plastic, fall) by using the technique of metallic dampers. The method of metallic dampers is one of the modern ways based on the principle of dissipating the resulting energy from the seismic shock and reducing the needed energy in the main structural elements of the building to keep it in a flexible state. This technique also provides a controlling mechanism for story displacement, the handling of the soft story mechanic and the torsion mechanic of the buildings. In this study, the effect of the addition of ADAS dampers on the construction behavior was observed in terms of (building period, base shear, roof displacement, roof acceleration, story displacement, dissipative energy). Based on the preceding, this study will give the possibility of predicting the behavior of the building when using ADAS metal dampers in the reinforced concrete structures with their distribution methods.

Reef: Drawing in the Expanded Field

In this article we introduce a body of research on drawing in the extended field and discuss a recent outcome – Reef, an installation at the Tin Shed gallery, Sydney. The research agenda has evolved from architectural sketch drawing. The research extends the open, evocative capacity of drawing through experimental installation art works, deploying sculptural sketch objects, VR, AR and soundscapes. Reef is the second in a series exploring the landscape phenomena of seismic shock. It is a sketch of a section of seabed in Kaikōura, Aotearoa New Zealand.

Reef: Drawing in the Expanded Field

In this article we introduce a body of research on drawing in the extended field and discuss a recent outcome – Reef, an installation at the Tin Shed gallery, Sydney. The research agenda has evolved from architectural sketch drawing. The research extends the open, evocative capacity of drawing through experimental installation art works, deploying sculptural sketch objects, VR, AR and soundscapes. Reef is the second in a series exploring the landscape phenomena of seismic shock. It is a sketch of a section of seabed in Kaikōura, Aotearoa New Zealand.

DO RECONSTRUCTION INVESTMENTS IMPROVE TECHNOLOGICAL PROGRESS IN AN EARTHQUAKE-STRICKEN AREA? EVIDENCE FROM THE WENCHUAN EARTHQUAKE

This study identified the impact of a seismic shock on technological progress in earthquake-stricken areas (ESAs) using a synthetic control method. Technological progress was measured using the total factor productivity (TFP) and the TFP growth rate. The ESAs after the Wenchuan Earthquake in China were used as an empirical case study; the Solow residual model was used to assess the TFP and the TFP growth rate in 16 districts. Counter-factual dynamics for the ESAs were constructed to exclude the effect of the macro-economy. The research findings indicate that technological progress in the ESAs after the Wenchuan Earthquake improved as a result of reconstruction investments. However, there were differences in the speed of technological progress between ESAs. These differences may be attributed to the differences in the industrial characteristics between ESAs. The study concludes that the technological progress of the secondary industry, such as the manufacturing industry and building industry, is more resilient. This refers to the capacity to resist economic losses after the seismic shock, compared to the tertiary industry, such as the service industry and tourist industry. However, there was a larger long-term advancement in the technological progress in the tertiary industry compared to the secondary industry after the earthquake. With this understanding, ESA governments can implement appropriate strategies to meet both short-term needs and sustainable economic growth.

First-Aid and Provisional Devices in Historical Structures with Collapse Risk after Seismic Shock

Realization of first-aid devices for the safety of heavily damaged structures of the Cultural Heritage assets is one of the main problems in the post-earthquake emergency phase. However, the adopted solutions, characterized by the utmost urgency, often appear uneven, ineffective and expensive. Six years after the earthquake in Emilia Romagna Region, which damaged numerous historical buildings, above all churches, it seems worthwhile to reflect on the management of the post-earthquake emergency and reconstruction interventions. As a matter of fact, in 2012, many Public Institutions were unprepared to deal with such an event: the lack of an appropriate knowledge about how to intervene in such conditions has led to solutions that are unnecessarily expensive, technically ineffective and, sometimes, even harmful for the building itself. Frequently, the strengthening devices had to be entirely redesigned during the subsequent phase of definitive intervention, entailing additional costs for the removal of those realized in the emergency phase. The cases in which the provisional devices have been designed in preparation for the final strengthening, sometimes even becoming definitive themselves, are rare. Therefore, this experience has raised some reflections concerning the functionality of the temporary safety measures. It has been noticed that an appropriate design of the provisional devices is fundamental in order to avoid interventions that could compromise the value of the architectural asset, to allow the knowledge of the structure for designing the definitive strengthening and to consider the permanent implications of such safety measures. This note presents some case-studies related to strengthening actions following the 2012 earthquake in Emilia, aiming to identify possible solutions for implementing the first-aid interventions in an integrated way with the subsequent strengthening phase in order to significantly reduce economic, material and time costs.

Seismic Performance of a Historical Apartment Building Using a Barcelona Model (BM) Adapted for Masonry Walls

The main objective of this study was to examine the dynamic response of a masonry monumental apartment building subjected to a strong seismic event. A three-dimensional FE model of the building was prepared with the ABAQUS Standard software program. Three components of the registered seismic event were applied as seismic excitation acting in three directions. To represent the inelastic behavior of the masonry elements of the structure under the earthquake, a Barcelona Model (BM) was assumed as a constitutive model for the masonry elements. The analysis proved that strongly nonlinear behavior of the masonry monumental apartment building was observed under the strong seismic shock. The plastic strains as well as the tensile damage (cracking) were obtained in some zones of the walls of the structure after seismic shock. In the paper authors also discussed the methodology for strengthening and structural health monitoring dedicated for historical masonry structures.