Numerical investigation of stochastic response of an elevated water tank to random underground blast loading

Abstract

This paper presents a stochastic finite element seismic response study of a water tank subjected to random underground blast-induced ground motion. Such tanks contain water and hazardous chemical substances, which implies significant risk to human life, serious environmental pollution, and considerable economic loss. The random blast-induced ground motion is represented by power spectral density function and applied to each support point of the three dimensional finite element model of the elevated water tank-fluid interaction system. A parametric study is conducted to estimate the effects of the blastinduced ground motion on the stochastic response of the elevated water tank system. Therefore, the analyses are carried out for different values of the charge weight and the distance from the charge centre. Additionally, in order to investigate the effect of the fluid on the stochastic response of the elevated water tank, three cases with different water levels are considered in the analyses. Finally, it is observed that underground blast loading considerably changes the stochastic behavior of the elevated water tank system.

An efficient finite element model for dynamic analysis of gravity dam-reservoir-foundation interaction problems

“…The equations of motion for each domain (dam, reservoir and foundation) were obtained by the energy method. Then, the coupled equation of motion for the system was derived using frictionless contact elements at the interfaces between mediums (Akkas, Akay et al 1979, Hacıefendioğlu 2009, Hacıefendioğlu, Soyluk et al 2012. The consistent mass matrices of the elements in the dam, near-field reservoir domain, and near-field foundation domain was calculated by 3x3 Gauss numerical integration method.…”

“…This boundary condition can be implemented using truss elements (Akkas, Akay et al 1979, Hacıefendioğlu 2009, Hacıefendioğlu, Soyluk et al 2012) between interface nodes or penalty methods (Klaus-Jurgen 1982). In this paper, short and axially almost rigid truss elements were used as interface link elements.…”

“…In the past studies, the dynamic analysis of DRI, DFI, and DRFI problems was studied by many researchers using several approaches such as the FE method (Chopra and Chakrabarti 1971, Chopra and Chakrabarti 1973, Gutierrez and Chopra 1978, Akkas, Akay et al 1979, Hacıefendioğlu 2009, Akköse and Şimşek 2010, Bayraktar, Sevim et al 2011, Gorai and Maity 2021, Boundary Element (BE) method (Medina and Domínguez 1989, Dominguez and Meise 1991, Tsai, Lee et al 1992, Maeso and Domínguez 1993, Küçükarslan 2004a, Küçükarslan 2004b, and coupled FE-BE method (Touhei and Ohmachi 1994, Abouseeda and Dakoulas 1998, Yaseri and Konrad 2021. The modeling of reservoir domain which is a challenging topic has been implemented by using the approaches such as Lagrangian (Akkas, Akay et al 1979, Wilson and Khalvati 1983, Hacıefendioğlu 2009, Akköse and Şimşek 2010, Bayraktar, Sevim et al 2011, Hacıefendioğlu, Soyluk et al 2012, Eulerian (Chopra and Chakrabarti 1971, Chopra and Chakrabarti 1973, Chopra 2020, Gorai and Maity 2021, and Added Mass (Westergaard 1933, Kuo 1982, Zhang, Wang et al 2013 with appropriate boundary conditions (Sommerfeld 1949, Sharan 1985, Higdon 1991, Kellezi 2000, Pelecanos, Kontoe et al 2013, Khazaee and Lotfi 2014. The dynamic behavior of dam structure is generally evaluated either in the time domain…”

Mine blast‐induced ground motion response reduction using semi‐active devices

“…Due to reducing the structural responses and repelling the destructive effects on different elements of structure, the use of dampers is inevitable. [ 1–3 ] Some dampers are used for the control of the responses of structures such as TMD dampers. [ 4–7 ] These types of dampers work by frequency and can help decrease the responses of the structures.…”

Seismic performance evaluation of concrete gravity dams using an efficient finite element model

“…Therefore, the dynamic analysis of dams has previously been studied using a variety of methodologies, including the Boundary Element Method (BEM) (Domínguez and Medina 1989;Medina and Domínguez 1989;Dominguez and Meise 1991;Tsai et al 1992;Maeso and Domínguez 1993;Küçükarslan 2004b;Küçükarslan 2004a), Finite Element Method (FEM) (Chopra and Chakrabarti 1971;Gutierrez and Chopra 1978;Akkas et al 1979;Hacıefendioğlu et al 2007;Hacıefendioğlu 2009;Akköse and Şimşek 2010;Bayraktar et al 2011;Azizan et al 2017;Gorai and Maity 2021), and FEM-BEM (Touhei and Ohmachi 1994;Abouseeda and Dakoulas 1998;Yaseri and Konrad 2021). The reservoir domain has been modeled by using Eulerian (Chopra and Chakrabarti 1971;Gogoi and Maity 2007;Alembagheri 2016;Gorai and Maity 2019), Lagrangian (Akkas et al 1979;Wilson and Khalvati 1983;Hacıefendioğlu 2009;Akköse and Şimşek 2010;Bayraktar et al 2011;Hacıefendioğlu et al 2012) or Added Mass (Westergaard 1933;Kuo 1982;Zhang et al 2013) approach and boundary condition (Sommerfeld 1949;Sharan 1985;Higdon 1991;Kellezi 2000;Pelecanos et al 2013;Khazaee and Lotfi 2014) at the far-field reservoir. Among these, the added mass method which is the distributi...…”