NEW LATERAL LOAD PATTERN FOR ESTIMATING SEISMIC DEMANDS OF ELEVATED WATER TANKS SUPPORTED ON CONCRETE SHAFT
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN STRUCTURAL, CIVIL AND ENVIRONMENTAL ENGINEERING
Author(s): AFSHIN MELLATI , FARAMARZ KHOSHNOUDIAN , MOHAMMAD HADIKHAN TEHRANI
Abstract: Up to now, few studies have been done on seismic behavior of elevated water tanks, despite the necessity of water tanks for consuming water and firefighting, especially after earthquake. The scope of this paper is to propose new lateral load patterns to evaluate seismic responses of elevated water tanks supported on concrete shaft and also modeling the structures using simple models such as frame elements, Housner model and Cone model rather than rigorous methods. In this regard, a shaft supported elevated water tank is simulated by considering the soil-structure and fluid-structure interactions. Then the effects of soil type variations on these responses are investigated. By Incremental Dynamic Analysis (IDA) the exact responses of this structure are studied under an ensemble of ground motions. Thereafter, Nonlinear Static Analysis (NSA) named as Pushover is performed by variation of lateral load patterns. At the end, the more reliable lateral load patterns are proposed based on compa
- Publication Date: 05-May-2013
- DOI: 10.15224/978-981-07-6261-2-87
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CRITICAL IMPACT ENERGY OF OGIVE NOSE HARD PROJECTILE FOR PENETRATION AND PERFORATION OF CONCRETE SLAB SIMULATION STUDY
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN STRUCTURAL, CIVIL AND ENVIRONMENTAL ENGINEERING
Author(s): AHMAD MUJAHID AHMAD ZAIDI , ISMAIL ABDUL RAHMAN , KAMRAN LATEEF , QADIR BUX ALIAS IMRAN LATEEF , SASITHARAN NAGAPAN
Abstract: In this paper two dimension (2D) asymmetrical numerical simulation analyses has been conducted on ABAQUS using dynamic Explicit analysis and Concrete damaged plasticity constitutive model. The simulation study was conducted for critical impact energy on thick concrete slabs impacted with ogive nose hard projectile diameter of 26.9mm and 76.2mm having CRH ratio 2.0 and 6.0. The limitations of concrete damaged plasticity model also have been analyzed. Furthermore, the simulation modeling was extending to achieve critical impact energy and residual impact energy for perforation of same thick concrete slab. In case of penetration, it was found that the simulation results are in close relation with experimental data. The limitation of Concrete damaged plasticity model found as that, during the impact analyses model does not allow the removal of elements. The extended simulation modeling for perforation shows encouraging results for critical impact energy and residual impact energy.
- Publication Date: 05-May-2013
- DOI: 10.15224/978-981-07-6261-2-74
- Views: 0
- Downloads: 0