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035 _a.b1247387x
099 9 _aAIT Thesis no.ST-24-26
100 1 _aJayasinghe, Rajasinghege Mahendra Deshapriya
245 1 0 _aProgressive collapse analysis of steel transmission towers subjected to earthquakes with pulse effect using applied element method
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2024
300 _a77 leaves :
_bill.+
_e1 online resource
490 1 _aThesis ;
_vno. ST-24-26
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering
502 _aThesis (M. Eng.) - Asian Institute of Technology, 2024
520 _aSteel electric transmission towers are crucial for supporting overhead powerlines and are classified as lifeline structures. The most commonly used type of steel electric transmission towers are suspension towers. These steel structures are generally considered safe during seismic events. However, collapses have been observed under a specific ground motion effect known as a pulse. Progressive collapse of transmission towers can occur by sudden natural hazards like earthquakes, particularly when influenced by pulse effects. This causes localized damage to structural elements, such as load-bearing members, and leads to the failure of the entire structure or a significant portion of it. Pulse effects are especially critical, being characterized by their short duration, large amplitude, and rapid release of seismic energy. These intense forces can cause transmission towers to fail, impacting the whole lifeline and may lead to a total blackout.This research aims to examine the progressive collapse behavior of steel electric transmission towers under pulse and non-pulse conditions of identical ground motions. The Applied Element Method (ELS software) is used for numerical analysis on both wire-loaded and non-wire-loaded configurations of suspension-type towers subjected to three ground motions.To extract pulse from the three ground motions, continuous wavelet transform analysis is employed. Only the significant pulse was extracted.The results indicate that both wire-loaded and non-wire-loaded towers under pulse conditions collapsed during the pulse duration. However, without pulse conditions both towers only experienced minor damage without collapse. Non-wire-loaded tower required peak ground acceleration (PGA) with pulse to collapse compared to wire loaded tower. Most of the higher displacements and elements failed at tower height between 37.05 m to 42.55 m. It{u2019}s also identified as the critical location of both tower configurations under pulse effects, with failure primarily due to the buckling effect. When wire-loaded and non-wire-loaded towers collapse under pulse conditions, the total energy-time graphs observe a significant release of energy (sudden sharp peak during the collapse), while under non-pulse conditions for both towers, the energy curves remain constant towards the end.
650 0 _aElectric lines
_xPoles and towers
_xEarthquake effects
650 0 _aSteel, Structural
_xEarthquake effects
650 0 _aFinite element method
_xData processing
700 1 _aKrishna, Chaitanya,
_eChairperson
700 1 _aAnwar, Naveed,
_eExamination Committee
700 0 _aThanakorn Pheeraphan,
_eExamination Committee
710 2 _aComputer and Structures Inc.(CSI), USA,
_eScholarship Donor
710 2 _aAIT Scholarship,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. ST-24-26
856 4 0 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/Viewer/viewer.php?id=B23545
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909 _aBarcode : -
_bCREATED : 2026-02-02
_cRECORD # : i1357050x
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
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