Ebrahim Zamani

• Doctor of Philosophy (Ph.D)
• Professor (Assistant) at University of Shahrood

This research investigats the behavior of external concrete beam–column joints strengthened by carbon fiber-reinforced polymer sheets under reversed cyclic loads. The objective of this study is to compare two strengthening techniques. One specimen was strengthened by external bonding reinforcement (EBR) method while two other specimens were strengt...

Several parameters may affect the response of structures to seismic excitation. These include features of the structures, properties of imposed ground motion and geological specifications of building location. This research has been conducted to investigate the effects of the frequency content of earthquakes as an important property of ground motio...

Braced frames are generally used to defy lateral and sometimes axial force distributions between the main and secondary columns. In recent decades a variety of bracing systems have been devised and recommended, each system with its own merits and disadvantages. Nowadays, the use of energy dampers in structures for earthquake energy dissipation has...

In recent years, the use of braced frame systems has been expanded to achieve a stiff and ductile structures in high seismic zones. Among the various types of bracing systems, the knee bracing system has been specially considered for seismic design in steel structures. In this system, the diagonal member provides the system's stiffness, and the kne...

ویژگی¬های دیوار برشی فولادی از جمله ظرفیت باربری و سختی بالا در مقایسه با سیستم¬های لرزه¬ای دیگر باعث شده است که دیوار برشی فولادی یک سیستم مؤثر لرزه¬ای باشد. که استفاده از آن باعث کاهش هزینه¬ها و کوتاه¬شدن زمان ساخت می¬شود. تاکنون دیوارهای برشی فولادی صاف، حفره¬دار، موجدار، شیاردار و سخت-کننده مورد آزمایش قرار گرفته است. در این پژوهش سعی شده دیوار...

The scope of this study is to present the results of an experimental investigation of the behavior of shear deficient exterior beam–column joints retrofitted by carbon-fibre-reinforced polymers (CFRP’s). The joints have no transverse reinforcement so they called non-seismic (NS) joints. Four NS-grade of beam–column joints were tested under reversed...

This paper presents an experimental investigation on the behavior of retrofitted beam-column joints subjected to reversed cyclic loading. The experimental program comprises 8 external beam-column joint connection subassemblages tested in 2 phases; one was the damaging phase and second was the repairing phase. The Beam-column joints were designed on...

The efficiency of a seismic retrofit using externally bonded fiber-reinforced polymer composites on existing damaged reinforced concrete joints, designed prior to the introduction of modern standard seismic design code provisions in the mid-1970s, are herein presented, based on experimental investigations on beam-column joint subassemblies. The exp...

This paper presents the test results of three precast and one monolithic connection in moment-resisting concrete frame subjected to constant axial compression and lateral reversed cyclic loads. The precast specimens had cast-in-place concrete connections with different details, namely straight spliced (PC1), U-shaped (PC2), and U-shaped with steel...

In reinforced concrete design, there are situations where transfer of shear across a specific plane needs to be considered. Examples of such situation include corbels, bearing shoes, ledger beam bearing, and a host of connection between precast concrete elements. In this study, the shear transfer behavior of reinforced concrete is investigated expe...

Two types of precast and one type of monolithic full scale beam-column connections are tested under reversed cyclic loads. Both of the precast concrete connections tested were cast in place, but with different connection details, namely straight spliced (PC1) and U-shaped (PC2). The straight spliced and U-shaped connections were located in the beam...