Der Bericht dokumentiert Ort, Datum, Magnitude und Tiefe der Erdbeben in Sachsen über einen Zeitraum von drei Jahren. Bei der Auswertung der Registrierungen werden zusätzlich zu den Online-Stationen des seismologischen Sachsennetzes auch die Stationen der Nachbarländer einbezogen, deren Standorte in der Veröffentlichung dargestellt sind. Ein besonderes Ereignis stellt dabei der Erdbebenschwarm von Oktober bis Dezember 2008 dar. Das Kapitel »Induzierte Seismizität« befasst sich mit den Untersuchungen zur bergbauinduzierten Seismizität der Uranerzgrube Schlema-Alberoda und zur Böschungsbewegung des ehemaligen Braunkohletagebaues Nachterstedt.

Objective: The primary goal of this research is to identify social vulnerability and resilience to earthquake hazards within the Capital Regional District (CRD) and to generate recommendations for how the provincial health system and various local and regional government agencies can support the continued enhancement of disaster-resilient communities. Methods: Both quantitative and qualitative research methods were employed to evaluate social vulnerability and resilience. Quantitatively, the methodology developed by Cutter et al., was replicated to create a Social Vulnerability Index (SoVI). These data were supported by qualitative data obtained from focus group interviews in three communities in the CRD. Together, this mixed methods approach provided additional insights into the dimensions of social vulnerability, and resilience within the CRD. Results. From the SoVI, twenty-five census tracts (CTs) within the CRD exhibited ‘high social vulnerability’. These highly vulnerable CTs were most likely to be in more densely populated areas, whether they were in inner city neighbourhoods or suburbs of the City. The qualitative results suggest that a large scale seismic hazard will present substantial challenges for the CRD. The smaller, rural and remote communities of Sooke and Port Renfrew appeared to be more interested in emergency preparation than those in the City of Victoria, if judged by their participation rates. Conclusion. The information collected from research participants and the generation of the SoVI complements existing hazard maps and local knowledge well. Both have their place as tools for enhancing understanding of risk-assessment for the area. / Graduate

Sites in a 66-station geodetic network in central Greece have been occupied up to six times since 1989 using GPS surveying, and accurate positions have been computed using fiducially-improved or precise orbits. Site velocities are calculated under the assumption that they are constant with time, after correcting for co-seismic effects, and that the position of the fixed base station (and hence the entire network) may be subject to small errors. Low-order polynomial expressions do not fit the velocity field well. The pattern of observed strain closely resembles that derived from independent geodetic observations made over a hundred-year time-scale. Significant geodetic strain is observed across the Gulf of Korinthos, even after the co-seismic displacement field of the Ms=6.2 1995 Egion earthquake has been removed by forward modelling. Geodetic strain is higher in the western than eastern Gulf, in contrast to the seismic strain which is similar throughout. Seismic strain matches geodetic strain in the east, but a significant deficit of seismic moment exists in the west which may represent a high earthquake hazard in the medium term. The Ms=6.6 1995 Grevena earthquake struck a previously seismically quiet region well covered by a recent triangulation / trilateration survey. Ninety-one points from this network were reoccupied with GPS immediately after the earthquake, and site displacements computed. To invert for the earthquake source parameters from the geodetic displacement field, a novel inversion scheme is used which combines the Monte-Carlo and simplex approaches. A priori parameters are not required, even though the inverse problem is strongly nonlinear. The resulting focal mechanism agrees well with the global CMT solution and locally observed aftershocks, but implies a significantly higher scalar moment than do seismological studies. A network for observing post-seismic deformation has been established, which in view of the low background seismicity seems likely to provide significant results.

The 1994 Northridge and 1995 Kobe earthquakes, which were moderate in seismological terms, showed that many buildings were subjected to demolition or very expensive repairs because of severe damage in principle members, mainly in the column-beam connections. As a result, the development of dissipative systems was encouraged, which limit the damage parts to easily replaceable elements, in case of moderate earthquakes. One such system is the knee braced frame. Knee braced frames are a modified form of cross bracing in which the brace is cut short and connected to the mid point of a knee element spanning between the adjacent beam and column. The key component is the knee element, which controls both the initial elastic stiffness of the frame, and the onset of yield and subsequent energy dissipation. The knee elements are required to ensure energy absorption through repeated large deformations without suffering collapse or instability. This thesis describes the development of different knee element designs and their performance assessments. It is shown that the dissipative mechanism of the web yielding in shear is advantageous because it is independent of the moment distribution and it does not affect the connections and extends the dissipative zones to all its lengths. Extensive finite element modelling and experimental testing have been undertaken. In the shear yielding mode excellent performance was achieved using standard hot rolled sections, modified by the addition of web stiffeners to prevent localised buckling failure. Weakening of the knee element's webs so that it yields very early in an earthquake has potential benefit, but is shown to be unsafe as it promotes premature failure of the element. A knee element model for non-linear dynamic analysis of an entire building has been developed. Time history analyses showed that knee braced frames with the developed knee element have a large global ductility and an outstanding performance. Results obtained with different pushover analysis methods (Eurocode 8, FEMA-356 and ATC-40) have been compared to those obtained wit the time history analyses. Moreover FEMA-356 method, which includes a more accurate representation of the structure's significant post-yield stiffness, gave the closest agreement with the time history analyses and is recommended for the design of knee braced frames.

SOFTWARE DEVELOPMENT FOR R/C BUILDING VULNERABILITY INDEX AND MEMBER IMPORTANCE CALCULATION Turkey has many active faults which have the potential to generate large earthquakes. Recent earthquakes showed that the buildings in Turkey are not well designed and vulnerable to earthquakes. Previous studies on the subject showed that many structures in Turkey need to be strengthened before the next major earthquake to minimize property loss and casualties. A number of fast and approximate (mostly empirical) methods have been developed in the past to process large building stock. However, there are some important and special structures that do not fit with the general building stock and needs special consideration (e.g., disaster management center, governmental buildings, hospitals, tall structures, etc.). This study targets to evaluate those important and special structures in a detailed, fast, and correct manner. The developed software, which constitutes an important part of this study, does process the building information several times to determine member-based importance factors. The vulnerability index of the building will be determined using the importance of each load-carrying member and how much each member is forced with respect to its capacity. In order to augment user perception, a functional graphical user-interface is designed. Software is equipped with modules that generate input files for SAP2000 analysis program, conduct dynamic and static analysis automatically, and postprocess the generated analysis results which enable the engineer to make a decision on the vulnerability of the structure. Program is written in C++, using object-oriented programming technique. The main difference between this and similar studies is the generator program which automatically generates 3D-FE models and post-processes nonlinear analysis results for an effective decision mechanism. In this way, more realistic results can be obtained much faster. As future studies, new routines are planned to be implemented to the graphical user interface of the program which will suggest smart and engineered retrofit/strengthening alternatives to the user.

The aim of this thesis is to develop a GIS methodology to assess urban vulnerability to earthquake through a spatial analytical procedure in which vulnerability is taught of as a spatial decision problem. The main concepts within the framework is vulnerability assessment. In its typology, the defined technology is highly current, emergent and necessary for the local goverments. Considering the discussions on subsidiarity for local area services such a knowledge is hoped to prove the capacity of local goverments. First earthquake losses were estimated. Earthquake loss estimation activities can be categorized into two series of phases: pre-disaster phase / risk assessment, mitigation management post- disaster phase / emergency and rehabilitation management Two methods were used in estimating the primary damages and losses due to earthquake. In the first method spatial multicriteria analysis was performed to assign a vulnerability value to each building. As a second method SRAS(Seismic Risk Analysis Software) was used. Besides criteria for social risks, criteria for systematic vulnerability, which may influence the emergency response and management activities following the earthquake, were also considered. Criteria standardization, weighting and combining were accomplished by means of multi-criteria evaluation (MCE) methods, the theoretical background being based on the multi-attribute utility theory (MAUT). Expert knowledge based analysis was used and also three different earthquake scenarios about Odunpazari were run on SRAS. After the aggregation of the vulnerability values from building scale to neighbourhood scale, the urban facilities were analysed. Results showed that, 1/3 of the neighborhoods in Odunpazari are vulnerable to any possible earthquake.

iv This study aimed to examine the possible effects of being a volunteer in a nongovernmental organization (Neighborhood Disaster Support Project) for psychological distress and posttraumatic growth following the 1999 Marmara earthquake. The predictors of psychological distress and posttraumatic growth were also investigated. Risk factors were examined as pre-earthquake variables (e.g. socio-demographic variables), earthquake variables (e.g. severity of impact), and post-earthquake variables (e.g. being a Neighborhood Disaster Volunteer (NDV) or not, and coping strategies). One hundred survivors (66 Males and 34 females with an age range of 18-59) of the earthquake, who are NDVs and a control group, composed of 100 survivors (66 Males and 34 females with an age range of 18-60) who are not NDVs participated in the study. Furthermore, in order to see the effects of being closer or further to the earthquake epicenter, half of the sample was taken from G&ouml / lc&uuml / k (epicenter of the quake), and the rest were from izmit (further from the epicenter). Data was collected 4,5 years after the earthquake by a questionnaire consisting of three parts. One psychology graduate student and five trained NDVs administered the questionnaire individually. The first part of the questionnaire had items taping socio-demographic information and earthquake experiences. The second part included items related to the experience of being a volunteer. Finally, the third part contained three scales which assessed the participants&rsquo / psychological distress (Symptom Checklist-40), coping skills (Ways of Coping Questionnaire), and posttraumatic growth level (Stress Related Growth Scale). The results of factor analysis indicated that earthquake experience could be grouped into two factors, namely severity of impact and perceived life threat. It was found that the respondents had significantly higher perceived life threat than the severity of impact. The factor analysis for coping yielded four factors, which were problem focused/optimistic, fatalistic, helplessness and escape coping approaches. The comparison of the volunteer and non-volunteers samples showed that the non-volunteer sample uses significantly more levels of fatalistic coping. Moreover it was found that women use significantly more levels of helplessness coping. When the impact of the earthquake severity on post traumatic growth levels was investigated, results showed that individuals from G&ouml / lc&uuml / k (epicenter of the quake) had significantly higher growth levels than those from izmit (further away from epicenter). The results of regression analyses showed that low education level, helplessness approach, and less use of problem solving/optimistic approach were significant predictors of subjects&rsquo / general distress levels. Being a volunteer, using problem solving/optimistic approach and fatalistic approach appeared as significant predictors of posttraumatic growth. The results were discussed within the psychological distress and growth theories. Furthermore, limitations of the study, implications for psychosocial interventions and future research were discussed.

In Turkey, in most of the reinforced concrete buildings, hallow masonry infill walls are used as a non-structural element, during design stage, their contribution to overall building behavior is not well known. Observations made after the earthquakes revealed that these non-structural elements had beneficial effects on the lateral capacity of the building. In this study, the contribution of the hallow masonry infill walls to the lateral behavior of reinforced concrete buildings was investigated. For this purpose, two different buildings were chosen as case studies. Three and six story symmetric buildings are modeled as bare and infilled frames. The parameters that were investigated are column area, infill wall area, distribution of masonry infill walls throughout the story. To determine the effect of each parameter, global drift ratios are computed and are compared for each case.

This thesis focuses on the experimental studies conducted on the development of low-cost seismic base isolation pads using scrap automobile tires. Seismic base isolation is a well-defined building protection system against earthquakes, on which numerous studies have been conducted. The majority of the previous studies focus on the performance improvement of the base isolation systems. However, this study aims at cost and weight reduction of seismic base isolation pads by recycling otherwise useless material: scrap tires. Elastomer-based isolators have been heavily studied and used for the last 25 years. Steel or fiber reinforcement inside the elastomer isolators provides high vertical stiffness, whereas rubber segments between reinforcement layers provide low horizontal stiffness for the seismic base isolation. Since 1960&rsquo / s, automobile tires have been produced by means of vulcanizing rubber with steel mesh in different forms which have a similar effect as the steel plates or fibers inside the conventional elastomer-based isolators. Therefore, rectangular shaped layers cut from tread sections of used tires and then piled on top of each other can function as an elastomeric bearing. Since the tires are being designed for friction, load transfer between scrap tire layers would be large enough to keep all layers intact. A minimal slip generated between the piled layers at high strain rates may even help to dissipate some extra energy. Axial compression, dynamic free vibration, static shear and shaking table tests have been conducted on Scrap Tire Pads (STP) prepared by using different tire brands for different number of layers and orientations. The results have shown that the average shear modulus of STPs change between 0.9MPa and 1.85MPa. At the end of the dynamic tests it has been noticed that the lateral stiffness of STPs can be simply adjusted by changing the number of tread layers placed on top of each other. The amount of wire mesh inside the tire tread layers is relatively low compared to the steel plates in regular elastomeric pads / consequently, axial load capacity of STPs has been found to be around 8.0MPa. Static large deformation shear experiments have been performed to obtain the horizontal stiffness and shear modulus values at high strains and the results are tabulated in the manuscript. Steel and rubber layers are produced separately and just put on top of each other without any adhesive to form the &frac14 / scaled versions of STPs which were used to isolate a &frac14 / scaled masonry house on the shaking table available in METU Structural Laboratory. The experiment showed that non-vulcanized rubber-steel layers put on top of each other can also be used to isolate structures. In conclusion, STPs may be used as a low-cost alternative to conventional elastomer-based pads for seismic isolation of massive structures (e.g. stone wall rural masonry) or for temperature induced deformation compensation of rural bridges. STP usage is demonstrated using three hypothetical design examples in the manuscript.

全球氣候變遷天災頻傳，全球溫室效應亦導致氣候異常，颱風、洪水等天然災害發生的頻率與損失幅度亦逐漸增加，在地球環境越趨變化快速與惡化之下，政府如何因應天災所帶來之損失與影響亦越趨重要。 本研究宗旨希冀能提高政府對於地震等巨災風險管理的重視，研究風險管理如何緩和地震及風災洪水對台灣政府財政之損害。本文將以台灣地區之地震造成政府財產中橋樑損失資料以及風災洪水造成公部門建物內容物毀損資料，模擬出可能損失金額。分析政府在利用三種不同保險機制後政府之損失與風險分散程度，並以現行於台灣之住宅地震保險基金分層承擔風險機制為例，將所模擬出之政府財產總損失套入基金，擴大住宅地震保險基金的承保範圍並設立洪水基金，分析政府存在基金下之財政支出與損失波動度。另計算政府財產在三種保險機制設計下，不同風險偏好之政府所需繳納之保費；最後一部分將檢視發行地震巨災債券的價值變化。 / Because of global climate change, natural disasters frequently happened all over the world. Global warming leads to climate anomalies, the frequency and loss severity of typhoons, floods and other natural disasters have also increased steadily. And under the Earth's environment changes and deteriorates rapidly, how should the government response to natural disasters are becoming more and more important. The purpose of this study is to attach importance to earthquake or other catastrophe risk management, and how to mitigate earthquake and flood catastrophes damage to the Taiwan government. The purpose of this study is to estimate the exposures of some public properties of Taiwan to earthquake and flood catastrophes. The research team was able to secure from National Center University two event loss tables on the earthquake risk of road bridges and the flood risk of government buildings. Based on these tables we simulated 500,000 earthquake and flood losses respectively and constructed two loss distributions. Then we imposed three insurance schemes to illustrate how risk management can mitigate the Nat Cat risks. We further enlarged the scope to all government properties based on the losses from the 921 earthquake and the Morakot typhoon. On these enlarged loss distributions we imposed risk management schemes similar to that of the Residential Earthquake Insurance Fund (TREIF) to investigate the potential benefits of risk management on the Nat Cat exposures of government properties. And we find optimal premiums under different insurance mechanism with different risk preferences of the government. The last part will examine the changes in the value of the issue of earthquake catastrophe bonds.