3-D pushover analysis of a collapsed reinforced concrete chimney

Pushover analysis for the seismic response prediction of cable-stayed bridges under multi-directional excitation

“…However, studying the longitudinal and transverse flexure separately is conceptually wrong if material nonlinearities are involved, because the damage exerted to the tower due to its longitudinal flexure unavoidably affects the transverse response and vice versa. In order to overcome this drawback, and to consider the nonlinear modal interaction, the Coupled Nonlinear Static Pushover analysis (CNSP) is proposed here, rooted in EMPA (presented above) and in the proposal of Huang and Gould [19].…”

“…These components are multiplied by the factor Λ, which takes into account the difference in the spectral accelerations associated with each governing mode [19]:…”

“…Unfortunately, pushover procedures presented so far deal only with one DOF. Several authors proposed solutions for coupled capacity curves; Lin and Tsai [18] suggested a three DOF system which inevitably increases the complexity of the pushover analysis; more practically, Huang and Gould [19] extracted the transverse and longitudinal components of the coupled pushover analysis, and obtained the corresponding displacement demands from the 'capacity spectrum method' included in ATC-40 [2].…”

“…In this direction, Lin and Tsai [18] proposed an extension of MPA, substituting the SDOF by a three degree of freedom system which takes into account the coupling between the two horizontal translations and the vertical rotation, increasing the complexity of the procedure. More practically, Huang and Gould [19] performed a simultaneous bi-directional pushover analysis considering two load patterns along both horizontal directions.…”

Ayarli Kütle Sönümleyi̇ci̇li̇ Yüksek Mi̇nareleri̇n Di̇nami̇k Anali̇zi̇

“…Bu ise ana yapının özellikleri belirli olduğuna göre, AKS için optimum kütle, rijitlik ve sönüm değerlerinin belirlenmesi ile sağlanacaktır. Yapısal ve dinamik davranışları betonarme yüksek minarelere benzeyen betonarme yüksek bacalar için sönüm oranı oldukça düşüktür ve tipik olarak %2~5 aralığında değişir [20]. Başka bir örnek verilmek istenirse, yüksekliği 43 m olan betonarme bir su deposu üzerinde yapılan deneysel bir çalışmada sönüm oranı %2,65 olarak belirlenmiştir [21].…”