en Research Paper Research Paper <font size="1" face="Times-Italic"><font size="1" face="Times-Italic"><p align="left">Limit to the tension reinforcement ratio in flexural high strength reinforced concrete (HSRC) members is</p><p align="left">based on the requirement that tension failure as sufficient rotation capacity are ensured at ultimate limit state.</p><p align="left">However, the provisions for the total amount of longitudinal reinforcement ratio ( and ) are not associated with</p><p align="left">any rational derivation. In this paper, a quantitative measure to evaluate an upper limit to the compression</p><p align="left">reinforcement ratio of flexural HSRC members is proposed. The quantitative criterion to can be derived</p><p align="left">from i) steel congestion and ii) considerations that are related to the diagonal compression bearing capacity of the</p><p align="left">members. In this paper it is shown that, when shear loading is dominant, the limit to is set by the diagonal</p><p align="left">compression criterion. Parameters that affect this limit are deeply investigated and the expressions were derived for</p><p align="left">different end conditions, to provide an additional tool for a better design and assessment of the flexural capacity of</p><p align="left">HSRC members.</p></font></font> Congestion Criterion, Diagonal Compression, HSRC, Upper Limit to , End conditions. 19 26 http://ijce.iust.ac.ir/browse.php?a_code=A-10-94-5&slc_lang=en&sid=1 A.A. Maghsoudi maghsoudi.a.a@mail.uk.ac.ir 180031947532846006048 180031947532846006048 Yes H. Akbarzadeh Bengar h_akbarzadeh_b@yahoo.com 180031947532846006049 180031947532846006049 No