Optimal Design and Distribution of Viscous Dampers for Shear Building Structures Under Seismic Excitations

Abstract

Viscous dampers (VDs) are effective and widely used passive devices for the protection of civil structures, provided that appropriate design is carried out. For this purpose, optimal design and optimum distribution of VDs method are presented for a shear building under the critical excitation by using random vibration theory in the frequency domain. In the optimization, by using Differential Evolution (DE) algorithm and the top floor displacement are evaluated as objective functions taking into consideration upper and lower limits of VDs damping coefficients, so that optimal damper placement and properties of the shear building can be determined. In this design, the VDs-shear building system is tested under the three different ground motions being compared to some methods in the literature and uniformly distributed VDs placed at each story. It is shown that the results of the study are both compatible and very successful in reducing the response of the structure under the different ground motions.

A Heuristic Approach to Identify the Steel Grid Direction of R/C Slabs Using the Yield‐Line Method for Analysis

“…, l. ese constraints can be taken into account through a penalty function P(φ). Some constrained structural engineering problems solved by using penalty function methods are shown by Cetin et al [20].…”

“…In these cases, it can be useful to use the concept of structural optimization. It is well known that structural optimization is an important tool, both for sizing structure members and for helping the designer find the most suitable structural form [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Today, structural optimization is common in mechanical and aeronautical engineering, and in recent years it has been progressively adopted for structural-engineering applications, such as sizing building and bridge members [29][30][31][32][33][34][35][36], detailing reinforced concrete structures [37][38][39][40][41][42][43][44][45], shaping bridges [46][47][48][49][50], domes [51][52][53][54], and other threedimensional structures [55].…”

Distributed Passive Actuation Schemes for Seismic Protection of Multibuilding Systems

“…The combined allocation-tuning problem can be formulated as a constrained optimization problem, with a set of decision variables that describes the different allocation schemes and parameter values of the damping devices, an objective function that allows evaluating the suitability of the corresponding DDSs, and a system of constraints that incorporate relevant features of the considered technical setup. To solve allocation-tuning optimization problems (ATOPs), a wide variety of computational strategies have been proposed, which include specialized optimization methods [8][9][10][11][12] and adaptations of general-purpose optimization algorithms [13][14][15]. Specialized optimization methods are specifically designed for particular kinds of ATOPs and, sometimes, can produce remarkably effective results for the considered problem.…”

“…The general goal of the paper is to design high-performance DDSs for seismic protection of multibuilding systems (MBSs) formed by a row of m adjacent buildings as the one schematically displayed in Figure 1. There certainly exists a large number of works on DDS design for single buildings in the literature; some recent discussions on the topic can be found in References [5][6][7]15,16]. For the particular case of m = 2 adjacent buildings, the number of references is remarkably smaller but yet significant.…”

Mechanical Properties of Metallic Pseudo Rubber-Silicon Rubber Composite for Three-Way Seismic Isolation

“…Since the 1960s, seismic isolation (SI) has been widely studied and applied in buildings. It is generally agreed that the SI is the most mature and effective means to reduce the structural seismic damage for low-rise buildings and bridges [1][2]. The laminated rubber bearing is by far the most popular and well-developed SI devices [3][4].…”