Eswaran, R.
Study of reinforced concrete circular column crack control and modifcation in P-M interaction diagram - Vol.48, Issue 01 - Chennai CSIR- Strctural Engineering research Centre 2021 - 24-31p.
This paper presents the study of design methods for checking of
Reinforced Cement Concrete (RCC) circular columns crack width
control. The various case studies of design explain the importance of
crack width control in addition to design for limit state of collapse ie.,
strength requirements. In the beginning, this paper explains the cases
for which the higher area of reinforcement is required for crack width
control than the requirement for strength aspect. The sample design
calculation for crack width checking is also presented. Next, this paper
explains the safe zone in P-M interaction curve as per SP-16 of Indian
standards, where the circular sections are safe in both strength as well
as crack width control requirements. The unsafe zone in P-M
interaction curve describes the circular sections are safe as per
strength but unsafe as per crack width control requirements. Finally
the method for modification of P-M interaction curve in unsafe zone is
explained by increasing the percentage of reinforcement to satisfy the
crack width control. The modified design charts for calculating area of
reinforcement required are presented. These modified design charts
provide guidance to the structural designer while designing for limit
state of serviceability for RCC circular columns.
Civil Engineering
Circular Column Unsafe Zone Crack Width Control Axial Load vs. Moment
Study of reinforced concrete circular column crack control and modifcation in P-M interaction diagram - Vol.48, Issue 01 - Chennai CSIR- Strctural Engineering research Centre 2021 - 24-31p.
This paper presents the study of design methods for checking of
Reinforced Cement Concrete (RCC) circular columns crack width
control. The various case studies of design explain the importance of
crack width control in addition to design for limit state of collapse ie.,
strength requirements. In the beginning, this paper explains the cases
for which the higher area of reinforcement is required for crack width
control than the requirement for strength aspect. The sample design
calculation for crack width checking is also presented. Next, this paper
explains the safe zone in P-M interaction curve as per SP-16 of Indian
standards, where the circular sections are safe in both strength as well
as crack width control requirements. The unsafe zone in P-M
interaction curve describes the circular sections are safe as per
strength but unsafe as per crack width control requirements. Finally
the method for modification of P-M interaction curve in unsafe zone is
explained by increasing the percentage of reinforcement to satisfy the
crack width control. The modified design charts for calculating area of
reinforcement required are presented. These modified design charts
provide guidance to the structural designer while designing for limit
state of serviceability for RCC circular columns.
Civil Engineering
Circular Column Unsafe Zone Crack Width Control Axial Load vs. Moment