Assessing the seismic torsional vulnerability of elevated tanks with RC frame-type staging

Dutta, Sekhar Chandra; Jain, Sudhir; Murty, C. V. R.

doi:10.1016/s0267-7261(00)00003-8

Cited by 34 publications

(21 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The variation of non-dimensionalized ratio K F /(K V D) and the variation of the ratio ( ) of uncoupled torsional period (¹ @ ) and uncoupled lateral period (¹ V ) for such tanks are reported elsewhere [15,17]. The above expression shows that for stagings with less number of columns and panels, the nondimensionalized sti!ness ratio K F /(K V D) approaches 0)25.…”

Section: Idealized Systemsmentioning

confidence: 81%

“…The closed-form expression for torsional sti!ness (K F ) for the same was also derived similarly [15,16]. Subsequently, the expression for ratio of torsional and lateral sti!nesses was obtained as follows:…”

Section: Idealized Systemsmentioning

confidence: 99%

“…On the other hand, the two-element systems have sti!ness ratio closer to that of stagings with four columns and small number of panels. An increase in the number of columns considerably increases the sti!ness ratio, while an increase in the number of panels increases the sti!ness ratio only marginally [15,16]. The ratio S F /S V of torsional strength, S F , and lateral strength, S V , of the idealized systems should also closely match with that of the frame stagings of elevated water tanks for fairly accurate prediction of their inelastic coupled lateral-torsional behaviour.…”

Section: Idealized Systemsmentioning

confidence: 99%

See 2 more Smart Citations

Inelastic Seismic Torsional Behaviour of Elevated Tanks

Dutta¹,

Jain

Murty

2001

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

Section: Idealized Systemsmentioning

confidence: 81%

Section: Idealized Systemsmentioning

confidence: 99%

Section: Idealized Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Inelastic Seismic Torsional Behaviour of Elevated Tanks

Dutta¹,

Jain

Murty

2001

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

“…Therefore, they should remain operational after earthquakes for essential needs. Various deficiencies for the poor seismic performance of elevated water tanks during past earthquakes such as improper structural design of elements and joints, low reserve strength and ductility, and the effect of soil flexibility have been reported in the previous studies (Rai 2003;Dutta et al 2000). Current force-based design procedure adopted by most seismic design codes allows the seismic design of structures to be based on static or dynamic analyses of elastic models of the structure using elastic design spectra.…”

Section: Introductionmentioning

confidence: 99%

Development of an integrated remote monitoring technique and its application to para-stressing bridge system

Miyamoto¹,

Motoshita²,

Casas³

2013

Int J Adv Struct Eng

View full text Add to dashboard Cite

The seismic design codes/standards of most countries include the nonlinear response of a structure implicitly through a response reduction/modification factor (R). It is the factor by which the actual base shear should be reduced to find the design base shear during design basic earthquake considering nonlinear behavior and deformation limits of structures. In the present study, attempts are made to determine the 'R' factors of four existing RC staging elevated water tanks, which are designed as per draft Indian standards for seismic design of liquid and RC designs and having a ductile detailing considering the effects of soil flexibility. The elevated RC water tanks are analyzed using displacement controlled non-linear static pushover analysis to evaluate the base shear capacity and ductility of tank considering soil flexibility. The 'R' factor is obtained for four realistic designs of elevated RC water tanks having different capacities at two performance levels. The evaluated values of 'R' factor are compared with the values suggested in the design code. The results of the study show that the flexibility of supporting soil has considerable effect on response reduction factor, period and overall performance of water tank, indicating that idealization of fixity at base may be seriously mistaken for soft soils. All the studied water tanks were designed with higher safety margin than that of specified in Indian Standards.

show abstract

“…Very few studies have been conducted so far concerning the modeling of ground supported liquid storage tanks and the determination of their dynamic behavior. Dutta et al (2000) investigated the recurrence of torsional failure of elevated water tanks in past earthquakes. The authors seek to estimate the range of variation of natural period ratio, s, for usually constructed reinforced concrete elevated water tanks with frame-type stagings to assess their torsional vulnerability.…”

Section: Introductionmentioning

confidence: 99%

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

Hacıefendioğlu

Soyluk

Birinci

2011

Stoch Environ Res Risk Assess

View full text Add to dashboard Cite

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.

show abstract

Assessing the seismic torsional vulnerability of elevated tanks with RC frame-type staging

Cited by 34 publications

References 7 publications

Inelastic Seismic Torsional Behaviour of Elevated Tanks

Inelastic Seismic Torsional Behaviour of Elevated Tanks

Development of an integrated remote monitoring technique and its application to para-stressing bridge system

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

Contact Info

Product

Resources

About