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Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an accelerogram at a site during a particular earthquake. Earthquake shaking generally occurs in all three directions. Therefore, PGA is often split into the horizontal and vertical components. Horizontal PGAs are generally larger than those in the vertical direction but this is not always true, especially close to large earthquakes. PGA is an important parameter (also known as an intensity measure) for earthquake engineering, The design basis earthquake ground motion (DBEGM) is often defined in terms of PGA.

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  • ذروة التسارع الأرضي (ar)
  • Spitzenbodenbeschleunigung (de)
  • Aceleración sísmica (es)
  • Percepatan tanah puncak (in)
  • Accélération maximale du sol (fr)
  • Peak ground acceleration (it)
  • 최대 지반 가속도 (ko)
  • 表面最大加速度 (ja)
  • Peak ground acceleration (en)
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  • Spitzenbodenbeschleunigung ist ein Wert für die maximale Bodenbeschleunigung am Messort während eines Erdbebens. In der Fachliteratur wird sie auch als PGA bezeichnet (Akronym der englischen Bezeichnung Peak Ground Acceleration). Sie kann als Maß für die zerstörerische Kraft eines Erdbebens herangezogen werden. Im Bauwesen gibt es vorgeschriebene Industrienormen (EN 1998-1), die bestimmen, welchen PGA-Wert Gebäude unbeschädigt überstehen müssen. Als Einheit wird meist m/s2 oder die Erdbeschleunigung g verwendet. (de)
  • 최대 지반 가속도(Peak ground acceleration, PGA)는 지진 발생 시 진동으로 지반이 움직인 최대 가속도를 의미한다. 지진의 진도와 관련이 있으며 단위는 보통 g(중력 가속도 단위) 또는 gal(cm/s²)를 이용한다. PGA는 지형이나 지물, 지진계의 위치에 큰 영향을 받으므로 진원지에서 가속도는 다양하게 나타난다. 최대 지반 가속도를 표시할 때엔 진도 지도(shake map)을 이용해 표시한다. 지진 진도도 보통 이 최대 지반 가속도를 이용해 나타낸다. (ko)
  • 表面最大加速度(ひょうめんさいだいかそくど、英語: peak ground acceleration, PGAと略される。また design basis earthquake ground motion、DBEGMとも)とは、地震での地表での加速度の最大値の測定値であり、地震工学における重要な入力パラメータである。単に最大加速度と呼ばれる事も多い。 震度と同様、ある場所においてどれだけ強く地面が揺れたかを表すものである。マグニチュードとは異なり、地震全体のエネルギーを示すものではない。 地震においては建築物やインフラストラクチャーの被害は、地震のマグニチュードよりも、地震動により強く関係する。中程度の地震では表面最大加速度が被害の最大の決定要因である。強い地震では被害はにより強く依存する。 (ja)
  • ذروة التسارع الأرضي (بالإنجليزية: (PGA) Peak Ground Acceleration)‏ هي قياس يستعمل في وصف الهزات الأرضية، على مستوى سرعة تحرك سطح الأرض. تعتبر من أهم القياسات المستعملة في هندسة الزلازل، و في حساب احتمالات الخطر الزلزالي في منطقة معينة، و يعتبر أهم مفسر للأضرار التدميرية للزلازل. يرتبط هذا المقدار بشدة الهزة الأرضية، و بالبنية الجيولوجية للمنطقة المدروسة. (ar)
  • La aceleración sísmica es una medida utilizada en terremotos que consiste en una medición directa de las aceleraciones que sufre la superficie del suelo. Es una medida muy importante en ingeniería sísmica.​ Normalmente la unidad de aceleración utilizada es la intensidad del campo gravitatorio (g = 9,81 m/s2). (es)
  • Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an accelerogram at a site during a particular earthquake. Earthquake shaking generally occurs in all three directions. Therefore, PGA is often split into the horizontal and vertical components. Horizontal PGAs are generally larger than those in the vertical direction but this is not always true, especially close to large earthquakes. PGA is an important parameter (also known as an intensity measure) for earthquake engineering, The design basis earthquake ground motion (DBEGM) is often defined in terms of PGA. (en)
  • L'accélération maximale du sol (en anglais : Peak Ground Acceleration ou PGA) est un paramètre caractérisant le mouvement de sols soumis à des ondes sismiques ; il est lié à la vitesse du sol se déplaçant lors d'un séisme. Ce paramètre dépend de l'intensité de la secousse, mais aussi de la nature géologique du sous-sol. Pour les petits séismes (magnitude < 3), c’est surtout l’accélération qui est ressentie par la population et rarement les mouvements verticaux (Wu et al., 2003). Les dommages aux structures augmentent avec le PGA en lien avec les hautes vitesses. (fr)
  • Il Peak ground acceleration (PGA) è la misura della massima accelerazione del suolo indotta del terremoto e registrata dagli accelerometri. Diversamente dalla scala Richter, che misura l'ampiezza globale di un terremoto, il PGA misura l'intensità di un terremoto in una singola area geografica. La misura del PGA può essere vista come una misura strumentale di ciò che la scala Mercalli misura con quanto riportato da persone sulla gravità del sisma. Normalmente il valore del PGA e quello della scala Mercalli sono ben correlati. (it)
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