Different Analysis Strategies for Roller Compacted Concrete Dam Design
This study presents the results of numerical simulations of the 56 m high Kocak concrete gravity dam planned to be constructed in Giresun, Turkey. A three stage analysis procedure was employed, namely rigid block stability analysis, two-dimensional finite
- PDF / 1,107,261 Bytes
- 18 Pages / 439.37 x 666.142 pts Page_size
- 44 Downloads / 188 Views
Abstract This study presents the results of numerical simulations of the 56 m high Kocak concrete gravity dam planned to be constructed in Giresun, Turkey. A three stage analysis procedure was employed, namely rigid block stability analysis, two-dimensional finite element analysis both in frequency and time domain and three-dimensional dynamic analysis. The preliminary dimensions of the dam cross section were determined from stability analysis following recommendations in [1] and [2]. Afterwards, a time history analysis was conducted by following the procedure of [3] that accounts for foundation flexibility and dam-reservoir interaction using the finite element method. In order to estimate the crack lengths and distances, a nonlinear time history analysis was conducted for the two-dimensional model using Westergaard’s [4] added mass approach including concrete cracking based on a smeared rotating crack approach. In the 3D linear spectrum analysis, the importance of modeling the exact geometry and complete soil-dam interaction and the influence of earthquake induced effects were investigated. It was found that the preliminary design section based on rigid body equilibrium is susceptible to cracking. However, the locations of expected cracks are highly dependent on the 2D versus 3D idealization of the dam geometry. Considering the fact that the length to height ratio of the dam is around 3, detailed three-dimensional simulations was found to be necessary to determine potential damage locations after an earthquake. The analysis results shed light on the locations of grout curtain to U. Akpinar (&) A. Aldemir B. Binici Department of Civil Engineering, Middle East Technical University, Dumlupınar Bulvarı, Ankara 06531, Turkey e-mail: [email protected] A. Aldemir e-mail: [email protected] B. Binici e-mail: [email protected]
A. Öchsner et al. (eds.), Design and Analysis of Materials and Engineering Structures, Advanced Structured Materials 32, DOI: 10.1007/978-3-642-32295-2_9, Ó Springer-Verlag Berlin Heidelberg 2013
117
118
U. Akpinar et al.
reduce uplift pressures without sustaining severe damage under operational based earthquake hazard, and stability of the structure under maximum design and maximum credible earthquake hazard levels.
1 Introduction This chapter presents, different analysis methodologies were utilized in the design process of roller-compacted concrete (RCC) dams emphasizing on a case study, i.e. Kocak dam, which is located in Camoluk region of Giresun and has a distance of nearly 9 km to the East Anatolian fault. The following analysis techniques were carried out throughout this study. 1. Rigid block stability analyses 2. 2D linear elastic frequency domain analyses 3. 2D nonlinear finite element analysis including dam-foundation-reservoir interaction 4. 3D linear elastic finite element analyses with multi directional earthquake effects including dam-reservoir-rock interaction The aim of this study was to evaluate the safety of the most economical dam cross-section by comparing
Data Loading...
