Earthquake resistant structures

About: Earthquake resistant structures is a research topic. Over the lifetime, 1126 publications have been published within this topic receiving 27467 citations.

Seismic-Resistant Special Truss-Moment Frames

Abstract: This paper presents a new design concept and procedure for seismic resistant special truss-moment frames, which have been validated by full-scale tests on full-span truss-column subassemblages. The new design concept results in increased economy and excellent inelastic response with stable hysteretic behavior of the special trusses in moment frames when subjected to severe earthquake motions. The new concept also has an added advantage that the structure can be retrofitted after a major earthquake by simply replacing the damaged web members in the special segments of floor trusses. The proposed system is an excellent and efficient seismic resistant framing system for building structures.

Experimental Evaluation of Adaptive Elastomeric Base-Isolated Structures Using Variable-Orifice Fluid Dampers

Abstract: An experimental study of a base-isolated, 1:4 scale, three-story steel frame is presented. The isolation system incorporates laminated rubber (elastomeric) bearings combined with variable-orifice fluid dampers. The dynamic behavior of the variable-orifice dampers is modulated in accordance with an H∞ optimal feedback control algorithm. An experimental shaking table test program was used to evaluate the effectiveness of the variable-orifice dampers in reducing the dynamic response of the isolated test structure when subjected to both near-field and far-field earthquake records. The experimental test results demonstrate that the adaptive isolation system can significantly reduce the superstructure response compared to a conventional passive isolation system. In addition, analytical models of the isolated test structure were developed and calibrated via experimental system identification testing. Numerical simulations of the experimental tests demonstrate that the analytical models are well suited for descri...

Geotechnical aspects of the 1995 kobe earthquake

Abstract: The paper provides background information on earthquake generating plate tectonics in the Japanese archipelago, historical seismicity and development of fault rupture in the region during the Kobe earthquake. The geological setting and topography are described together with the expansion of land reclamation in the port area of Kobe. Characteristics of the ground motions recorded at various sites during the earthquake are also presented. Soil conditions investigated at two sites by way of undisturbed sampling using ground freezing technique are described. Features of liquefaction and consequent lateral spreading which occurred in the reclaimed fills are presented in terms of attenuation characteristics of the lateral displacement of the ground diminishing with distance inland from the waterfront. Outcome of comprehensive investigation on the damage to foundations of LPG storage tanks is described with emphasis on the behavior of precast reinforced concrete piles. Simple analyses were made for the behavior of piles undergoing lateral spreading.

Horizontal connections for precast concrete shear wall panels under cyclic shear loading

Abstract: The performance of precast concrete loadbearing shear wall panel structures during an earthquake relies on the behavior and integrity of the connections between the panels. Design of these structures requires the ability to predict the behavior of the connections. This paper presents results of an experimental study of horizontal connections for precast wall panels subjected to reversed cyclic shear deformations combined with simulated gravity loads normal to the connection. The influence of mild steel reinforcement, post tensioning and shear keys was investigated. Experimental results were used to determine the cyclic behavior of the connections and to identify the contribution of the connections and to identify the contribution of the connection components. Simple rational models were proposed to predict the limit states of the connections. Two numerical design examples are included to illustrate the proposed models. Based on the study, design recommendations are presented.