Abstract
This research work aims to compare the seismic performance (in terms of lateral load strength, stiffness, ductility, response modification factor and performance levels) of full scale infilled frames before and after retrofitting. To evaluate the seismic performance, two infilled frames with door opening at different locations were constructed in the laboratory based on the current construction practices in Pakistan. In one infilled frame, door opening was at the center (Frame-1) while in other, door opening was at a side (Frame-2). After construction, both the specimens were tested with quasi-static test. The damaged parent specimens were then retrofitted with Ferrocement overlay and cracks in the infill wall were repaired with grout injection. Steel door frames of gauge 18 were installed at the door opening to make the model more realistic. Results obtained after performing quasi static test on the retrofitted specimen have showed that the specimens not only gained the original strength, but the seismic parameters of the infilled frames were observed to have also improved.
Highlights
The Building Code of Pakistan Seismic Provision (BCP SP) was developed in 2007, after the unusual and unprecedented Kashmir earthquake of 2005 [1]
Existing non-engineered Reinforced Concrete (RC) buildings which were not designed and constructed according to the BCP-2007 are vulnerable to earthquakes To survive the future earthquakes, the existing RC buildings can be upgraded to a desired level of performance against the
The experimental study discussed in this research paper focused on the seismic performance of full scaled infilled frames having doors at different locations with reinforced plaster, grout injection and installation of steel door frames
Summary
The Building Code of Pakistan Seismic Provision (BCP SP) was developed in 2007, after the unusual and unprecedented Kashmir earthquake of 2005 [1]. Buildings in the areas affected by the said earthquake, suffered minor to major damage, and in some cases complete collapse. The main reasons behind the huge damage of buildings were low awareness about the earthquake, lack of seismic design codes and due to the major issues regarding construction practices i.e. poor quality of concrete, poor quality of mortar used in construction of walls and weak connections at the corners [2]. The infill walls and beam column joints in RC Reinforced Concrete (RC) frames may experience damages during an earthquake due to the design errors, poor detailing, and poor construction practices. Existing non-engineered RC buildings which were not designed and constructed according to the BCP-2007 are vulnerable to earthquakes To survive the future earthquakes, the existing RC buildings can be upgraded to a desired level of performance against the
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call