پديد آورندگان :
بهاروند, سيامك دانشگاه آزاد اسلامي خرم‌آباد - گروه زمين‌شناسي , رهنماراد, جعفر دانشگاه آزاد اسلامي زاهدان - گروه زمين‌شناسي , سوري, سلمان دانشگاه آزاد اسلامي خرم‌آباد - باشگاه پژوهشگران جوان و نخبگان
كليدواژه :
پهنه‌بندي و زلزله , زلزله و زمين لرزه , خرم‌آباد , روش سلسله‌مراتبي فازي
چكيده فارسي :
ﺷﻬﺮ ﺧﺮم آﺑﺎد در اﺳﺘﺎن ﻟﺮﺳﺘﺎن ﺑﻪ دﻟﯿﻞ ﻗﺮارﮔﺮﻓﺘﻦ ﺑﺮ ﭘﻬﻨﮥ ﻟﺮزة زﻣﯿﻦ ﺳﺎﺧﺖ زاﮔﺮس، ﯾﮑﯽ از ﺷﻬﺮﻫﺎي ﻟﺮزه ﺧﯿﺰ اﯾﺮان ﺑﻪ ﺷﻤﺎر ﻣﯽ آﯾﺪ. در اﯾﻦ ﭘﮋوﻫﺶ ﺑﻪ ﻣﻨﻈﻮر اﯾﻤﻨﯽ ﺑﯿﺸﺘﺮ در ﻣﻨﺎﻃﻖ ﻣﺴﮑﻮﻧﯽ و ﻃﺮح ﻫﺎي ﻋﻤﺮاﻧﯽ، ﭘﻬﻨﻪ ﺑﻨﺪي ﺧﻄﺮ ﻟﺮزه ﺧﯿﺰي در ﺷﻬﺮ ﺧﺮم آﺑﺎد ﺑﺎ اﺳﺘﻔﺎده از ﺷﺶ ﻣﺆﻟﻔﮥ ﻣﺤﯿﻄﯽ ﺷﺎﻣﻞ ﻓﺎﺻﻠﮥ ﮐﺎﻧﻮﻧﯽ زﻣﯿﻦ ﻟﺮزه ﻫﺎ از ﺷﻬﺮ ﺧﺮم آﺑﺎد، ﻓﺎﺻﻠﮥ ﮔﺴﻞ ﻫﺎي اﺻﻠﯽ از ﺷﻬﺮ، ﻋﻤﻖ رﺧﺪاد زﻣﯿﻦ ﻟﺮزه ﻫﺎ، ﺷﺘﺎب زﻣﯿﻦ ﻟﺮزه، ﻟﯿﺘﻮﻟﻮژي و ﺷﯿﺐ ﻣﻄﺎﻟﻌﻪ ﺷﺪ. ﺑﺪﯾﻦ ﻣﻨﻈﻮر ﻧﺨﺴﺖ ﺑﺎ ﺑﻬﺮه ﮔﯿﺮي از ﮔﺮدآوري ﮐﺎﺗﺎﻟﻮگ داده ﻫﺎي ﻟﺮزه ﺧﯿﺰي در ﺑﺎزة زﻣﺎﻧﯽ ﺳﺎل ﻫﺎي 1900 ﺗﺎ 2018، ﻧﻘﺸﮥ ﻋﻮاﻣﻞ ﻓﺎﺻﻠﮥ ﮐﺎﻧﻮﻧﯽ زﻣﯿﻦ ﻟﺮزه ﻫﺎ از ﺷﻬﺮ ﺧﺮم آﺑﺎد و ﻋﻤﻖ رﺧﺪاد زﻣﯿﻦ ﻟﺮزه ﻫﺎ ﺗﻬﯿﻪ ﺷﺪ، ﺳﭙﺲ ﺑﺎ ﺑﻬﺮه ﮔﯿﺮي از ﻧﻘﺸﮥ زﻣﯿﻦ ﺷﻨﺎﺳﯽ و ﺧﻄﻮط رﻗﻮﻣﯽ ارﺗﻔﺎع ﻣﻨﻄﻘﻪ، ﻧﻘﺸﮥ ﻓﺎﺻﻠﻪ از ﮔﺴﻞ، ﻟﯿﺘﻮﻟﻮژي و ﺷﯿﺐ ﺷﻬﺮ ﺧﺮم آﺑﺎد و ﺑﺎ روش ﻗﻄﻌﯽ زﻟﺰﻟﻪ ﻃﺮح )DSHA( و ﺑﻬﺮه ﮔﯿﺮي از رواﺑﻂ ﺗﺠﺮﺑﯽ ﻣﻮﺟﻮد ﺑﯿﻦ ﻣﺸﺨﺼﻪ ﻫﺎي زﻟﺰﻟﻪ، ﻧﻘﺸﮥ ﺷﺘﺎب اﻓﻘﯽ زﻣﯿﻦ ﻟﺮزه ﻫﺎي )PGA( ﻣﻨﻄﻘﻪ ﺑﻪ دﺳﺖ آﻣﺪ. ﭘﺲ از ﺗﻬﯿﮥ ﻻﯾﻪ ﻫﺎي اﻃﻼﻋﺎﺗﯽ، ﻧﻘﺸﮥ ﻫﺮﯾﮏ از ﻋﻮاﻣﻞ ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﺎ اﺳﺘﻔﺎده از ﻣﻨﻄﻖ ﻓﺎزي و ﻓﺮاﯾﻨﺪ ﺗﺤﻠﯿﻞ ﺳﻠﺴﻠﻪ ﻣﺮاﺗﺒﯽ، اﺳﺘﺎﻧﺪاردﺳﺎزي و وزن دﻫﯽ ﺷﺪ. درﻧﻬﺎﯾﺖ ﺑﺎ ﺗﻠﻔﯿﻖ ﮥ ﻻﯾﻪ ﻫﺎي اﺳﺘﺎﻧﺪاردﺳﺎزي ﺷﺪه در وزن آﻧﻬﺎ، ﻧﻘﺸﮥ ﻧﻬﺎﯾﯽ ﭘﻬﻨﻪ ﺑﻨﺪي ﺧﻄﺮ زﻣﯿﻦ ﻟﺮزه در ﺷﻬﺮ ﺧﺮم آﺑﺎد ﺑﺎ اﺳﺘﻔﺎده از روش ﺗﻠﻔﯿﻘﯽ ﺳﻠﺴﻠﻪ ﻣﺮاﺗﺒﯽ ﻓﺎزي ﺗﻬﯿﻪ ﺷﺪ. ﺑﺮاﺳﺎس ﻧﺘﺎﯾﺞ ﺑﻪ دﺳﺖ آﻣﺪه ﺑﺎ اﺳﺘﻔﺎده از اﯾﻦ روش ﺑﻪ ﺗﺮﺗﯿﺐ 6/43، 12/74، 24/57، 5/13 و 21/12درﺻﺪ از ﻣﺴﺎﺣﺖ ﺷﻬﺮ ﺧﺮم آﺑﺎد در ﮐﻼس ﻫﺎي ﺧﻄﺮ ﺑﺴﯿﺎر ﮐﻢ، ﮐﻢ، ﻣﺘﻮﺳﻂ، زﯾﺎد و ﺑﺴﯿﺎر زﯾﺎد ﻗﺮار ﮔﺮﻓﺖ
چكيده لاتين :
The city of Khorramabad in Lorestan province is considered as one of the seismic cities of Iran due to
its location on the Zagros earthquake zone. In this research, for more safety in residential areas and
construction projects, seismic hazard zonation in Khorramabad city was studied using six
environmental parameters including focal length of earthquakes, distance from major faults, and focal
depth of earthquake events, earthquake acceleration, lithology, and slope. To this end, by using a
seismic data catalog for the period from 1900 to 2018, maps of the focal lengths and the focal depths
of earthquake events were prepared. Using the geologic and digital elevation maps, maps of distance
from the fault, the lithology and the slope, and using a Deterministic Seismic Hazard Assessment
(DSHA) and using the existing empirical relationships between the characteristics of the earthquake,
the peak ground acceleration map (PGA) of the region was prepared. After providing the data layers,
the map of each factor is standardized and weighed using fuzzy logic and hierarchical analysis
process, respectively. By integrating all standardized layers in their weights, the final map of
earthquake hazard zonation of the city was prepared using a hybrid hierarchical-fuzzy method. Based
on the results of the above-mentioned method, 6.43%, 12.74%, 24.57%, 35.13% and 21.12% of the
city's area are located in very low, low, moderate, high and very high risk classes, respectively.
