Determining the Optimal Scalar Intensity Measure of Floor Communication Towers

Abstract

Various structural types and ground motion characteristics lead to distinct intensity measures of structural seismic performance. For the lattice high-rise steel structure of communication towers, determining the intensity measures to adjust ground motion is critical. Additionally, a crucial problem is whether the ground motion intensity parameters of pulse-like ground motion and ordinary ground motion are consistent. In this study, a standard floor four-leg angle steeled communication tower was considered the study object, and 50 pulse-like ground motions and 50 ordinary ground motions were identified to form a pulse-like ground motion set and ordinary ground motion set, respectively. For comparative analyses, 15 ground motion parameters, including amplitude, spectrum, duration, and energy parameters, were selected. The results revealed that for the lattice towers, such as communication tower, under the action of pulse-like ground motion or ordinary ground motion, efficiency, practicability, and sufficiency should be considered. Furthermore, the most suitable intensity measure was the spectral acceleration corresponding to the natural period of the tower. This study provides a basis for selecting the ground motion for dynamic time history analysis of the lattice steel tower.

Optimal Intensity Measures for Probabilistic Seismic Stability Assessment of Large Open-Pit Mine Slopes under Different Mining Depths

“…Using the results of slope fragility curves as well as the seismic hazard curves of the site of interest, the FOS hazard curves can be calculated using equation (12). Based on the above results, PGV is a relatively better IM among three commonly used IMs, especially for the slope cases with depths of 50 m and 100 m. Due to the lack of groundmotion prediction equations (GMPEs) for SMV, VSI, and HI in the region of interest [62,63].…”

“…Te performance-based earthquake engineering (PBEE) developed by the Pacifc Earthquake Engineering Research (PEER) Center is an advanced probabilistic seismic risk assessment methodology and can provide more rational, credible, and practical way to quantify the inherent uncertainties of all performance variables of slopes. Te PBEE framework has been currently applied to the seismic risk assessment of various civil engineering structures such as buildings [9], bridges [10], dams [11], and towers [12]. However, limited numbers of literature are available on probabilistic seismic stability assessment of slopes based on the advanced PBEE methodology [13], especially to open-pit mine slopes.…”

Faya Uzak Yer Hareketi Kayıtları Etkisindeki Yapıların Deprem Davranışları ile Yer Hareketi Şiddet Ölçütlerinin Etkinliklerinin Değerlendirilmesi

“…Bu araştırma sonucunda PGA'nın sismik analizlerde diğer YHŞÖ'ne göre yapı davranışı ile daha az ilişkili olduğu ve en büyük yer değiştirme (PGD), Ortalama Karekök Yer Değiştirme (RMSD), Ortalama Karekök Hız (RMSV) ve Özgül Enerji Yoğunluğunun (SED) yapı davranışı ile ilişkisinin daha güçlü olduğu sonucunu ortaya koymuşlardır. Li ve arkadaşları [10], yaptıkları çalışmada iletişim kulelerinin yüksek katlı çelik yapısı için ideal olan YHŞÖ'nin belirlenmesini incelemişlerdir. Analizlerinde, faya yakın (darbe içeren kayıtlar) ve faya uzak kayıtlar kullanmışlardır.…”