Free from damage beam-to-column joints: Testing and design of DST connections with friction pads

Structural control systems have gained popularity for the ability to reduce the structural vibration response of civil structures subjected to different types of dynamic loads. Passive, semi-active, active and hybrid control systems have been widely utilized in various types of structures. This article presents one of the most economical and yet the most effective approaches used in structural vibration control. Herein, a comprehensive state-of-the-art review of the development and application of metallic dampers is discussed. The dampers are classified into five categories: steel, aluminum, lead, copper and shaped-memory alloy dampers. In addition, the details of various computational methods used in the analysis of metallic dampers are briefly explained. This article reveals that the use of metallic dampers is being advanced broadly owing to their low manufacturing costs, stable hysteresis behavior, resistance to ambient temperature, reliability and high energy dissipation capability. It is also concluded that mild steel is the most popular material among metallic dampers.

State-of-the-Art Review of Metallic Dampers: Testing, Development and Implementation

Cyclic testing of replaceable damper: Earthquake-resilient prefabricated column-flange beam-column joint

A brace-type seismic damper based on yielding the walls of hollow structural sections

Seismic resilient steel structures: A review of research, practice, challenges and opportunities

Seismic performance of steel structures with slit dampers

This study represents a summary of a current experimental program in the application of an energy dissipation system for seismic protection of structures. Shaking table test has been carried out for the structures with and without a hysteretic damper device for two types of structures in one direction (CBSS: Concentrically Braced Steel Structure, HDSS: Hysteretic Damper Steel structure). The hysteretic damper device which is proposed in this study has been developed to provide relatively high initial stiffness, stable hysteresis with the limited but controlled yield strength in different stories in order to have equal plastic deformation in high intensity of ground motion, and excellent energy dissipation capabilities. The experimental results and test method have been outlined here. In this experiment, the non-linear dynamic response analysis has been performed with different scaling factor for the two types of idealized three-story concentrically braced steel structures. It has been emphasized that the hysteretic damper can absorb the majority of input energy from earthquakes in order to reduce the displacement and damage to the main steel frame. The mechanical properties of dampers such as yield strength and stiffness are defined to have the equal damage at each story.

Shaking table test for evaluating the seismic response characteristics of concentrically braced steel structure with and without hysteretic dampers

Existing shear wall system may cause ductility fallen to the structure which it is on because relatively weak concrete core would easy to be damaged. In this study, steel hysteresis dampers whose stiffness is higher than existing coupling beam and whose strength is easy to change depending on design load was used in coupling beam. The steel hysteresis damper was proposed for the shape connected in double in series, from this, several static test were conducted to verify structural performance of the damper. FEM analysis was also performed, then design equation were suggested.

Structural Performance Evaluations of Steel Hysteretic Damper in Series for High-Rise Shear Wall System

Static Loading Test for Performance Evaluation of Dual-Frame Type Seismic Retrofit System

In order to evaluate the limit earthquake resistance of multi-story steel frames influenced by the strength and stiffness ratios of members, a series inelastic response analysis were carried out. From the analysis results, the damage distribution rules of multi-story steel frames were proposed. Conclusions are summarized as follows; 1)As the stiffness ratios of beam and column becomes small, the damage concentrates on the lower end of columns of the first story. 2) Considering the strength and stiffness ratios of the beam and column with weak beam type mechanism, the equations predicting the damage distribution of multi-story steel flames were proposed. 3) Through the equation which was supposed in this study, it is speculated that the damage distribution of the rigid or semirigid beam collapse type multi-story steel structure building can be predicted.

/pdf/damage-distribution-rule-of-weak-beam-type-multi-story-steel-574u81tn57.pdf

Hong-Sik Ryu

Papers

Seismic performance of steel structures with slit dampers

Shaking table test for evaluating the seismic response characteristics of concentrically braced steel structure with and without hysteretic dampers

Structural Performance Evaluations of Steel Hysteretic Damper in Series for High-Rise Shear Wall System

Static Loading Test for Performance Evaluation of Dual-Frame Type Seismic Retrofit System

Damage Distribution Rule of Weak Beam Type Multi-Story Steel Frames Influenced by Strength and Stiffness Ratios of Beam and Column