Ancajas,Julius Ed A.
A proposed connection design details of a crack-free chb wall for one-storey residential building against earthquake effects - Cebu City CIT-U 2015
?Earthquakes are one of the most devastating natural hazards that cause great loss of life and livelihood. On average, 10,000 people die each year due to earthquakes, while annual economic losses are in the billions of dollars and often constitute a large percentage of the gross national product of the country affected? (Elnashai and Sarno, 2008).
Earthquake is one of the most cautioned natural calamity everyone should be concerned of. It is a work of nature that wraks havoc upon the world and causes great damage if not prepared of. Hand-in-hand it can be mitigated so as to minimize, as much as possible, the damage it would take. Structures and buildings need to be designed properly in order to reduce any casualties whenever actual earthquake happens.
The study is mainly focused on developing a design for the connection of a CHB wall to the columns and the beams. Specifically, the researchers are mainly concerned on the walls for residential buildings. The researchers have conceptualized a design which incorporates their knowledge from the different subjects taken during their stay in the university. Design details for the CHB wall would be the same as the conventional method of construction. The difference would only lie on the CWBW (column-to-wall, beam-to-wall) connection, where a slit has been introduced to cut-off the connection between the wall and the frame. The aim of the study is to minimize, if not prevent cracks or any damages from forming when induced with ground shaking. Stated also in the paper are related studies that supports the concept of the design developed by the researchers.
In order to check the effectiveness of the design developed, the researchers have constructed a model with a scale of 1/6 ratio. The model is a one-storey 3 meters by 3 meters residential building with the element dimensions presented in the paper; both for actual and for the model dimensions. Also, step by steps details for the construction of the model is presented in the paper in order for the readers to be able to understand how the design will be applied on the actual construction. This study will serve as an eye-opener to the public to inform them of a better design for the connection of the walls in their houses that would improve its performance during an actual earthquake. The detailed steps can be followed if they wish to try out the innovate design developed.
In accordance to the testing of the model, since actual shaker table is not available in the university and even in the whole province of Cebu, the researchers have also developed an improvised shaker table which was used to test the model constructed. The shaker table has made use of the spring action to produce shaking which would imitate ground movement during an earthquake. It also consists of an electric fan motor with only one fan blade to cause a wobbling effect thus producing vibrations though the springs which is located on every corner of the shaker table. Figures have been presented in the paper to clearly present how it has been built.
From the testing, there is minimal results that have been shown. Nevertheless, the results have shown that developed design by the researchers have improved the performance of the wall during induced seismic activity. It has been shown that there were cracks that have formed on the wall model which followed the conventional method for the CWBW connection details. Moreover, more evident results would have been observed if actual shaker table have been used to test the model constructed. Improvement on the model and the shaker table would surely produce apparent results to clearly imitate the behavior of the developed design and the conventional one during an actual earthquake.
For everyone to reflect on the urgency of such studies the researchers would leave a statement to be pondered upon. ?Shelter is one of the primary necessity of a man. This has been true since even before the Stone Age. It is only appropriate that everyone should work together on its advancement in order to have a more secure and safer shelter for each one of us? ? The Researchers (2015)
T An21 2015
A proposed connection design details of a crack-free chb wall for one-storey residential building against earthquake effects - Cebu City CIT-U 2015
?Earthquakes are one of the most devastating natural hazards that cause great loss of life and livelihood. On average, 10,000 people die each year due to earthquakes, while annual economic losses are in the billions of dollars and often constitute a large percentage of the gross national product of the country affected? (Elnashai and Sarno, 2008).
Earthquake is one of the most cautioned natural calamity everyone should be concerned of. It is a work of nature that wraks havoc upon the world and causes great damage if not prepared of. Hand-in-hand it can be mitigated so as to minimize, as much as possible, the damage it would take. Structures and buildings need to be designed properly in order to reduce any casualties whenever actual earthquake happens.
The study is mainly focused on developing a design for the connection of a CHB wall to the columns and the beams. Specifically, the researchers are mainly concerned on the walls for residential buildings. The researchers have conceptualized a design which incorporates their knowledge from the different subjects taken during their stay in the university. Design details for the CHB wall would be the same as the conventional method of construction. The difference would only lie on the CWBW (column-to-wall, beam-to-wall) connection, where a slit has been introduced to cut-off the connection between the wall and the frame. The aim of the study is to minimize, if not prevent cracks or any damages from forming when induced with ground shaking. Stated also in the paper are related studies that supports the concept of the design developed by the researchers.
In order to check the effectiveness of the design developed, the researchers have constructed a model with a scale of 1/6 ratio. The model is a one-storey 3 meters by 3 meters residential building with the element dimensions presented in the paper; both for actual and for the model dimensions. Also, step by steps details for the construction of the model is presented in the paper in order for the readers to be able to understand how the design will be applied on the actual construction. This study will serve as an eye-opener to the public to inform them of a better design for the connection of the walls in their houses that would improve its performance during an actual earthquake. The detailed steps can be followed if they wish to try out the innovate design developed.
In accordance to the testing of the model, since actual shaker table is not available in the university and even in the whole province of Cebu, the researchers have also developed an improvised shaker table which was used to test the model constructed. The shaker table has made use of the spring action to produce shaking which would imitate ground movement during an earthquake. It also consists of an electric fan motor with only one fan blade to cause a wobbling effect thus producing vibrations though the springs which is located on every corner of the shaker table. Figures have been presented in the paper to clearly present how it has been built.
From the testing, there is minimal results that have been shown. Nevertheless, the results have shown that developed design by the researchers have improved the performance of the wall during induced seismic activity. It has been shown that there were cracks that have formed on the wall model which followed the conventional method for the CWBW connection details. Moreover, more evident results would have been observed if actual shaker table have been used to test the model constructed. Improvement on the model and the shaker table would surely produce apparent results to clearly imitate the behavior of the developed design and the conventional one during an actual earthquake.
For everyone to reflect on the urgency of such studies the researchers would leave a statement to be pondered upon. ?Shelter is one of the primary necessity of a man. This has been true since even before the Stone Age. It is only appropriate that everyone should work together on its advancement in order to have a more secure and safer shelter for each one of us? ? The Researchers (2015)
T An21 2015