cost optimization of the reinforced concrete cantilever soil retaining wall of a given height satisfying some structural and geotechnical design constraints is performed utilizing harmony search and improved harmony search algorithms. the objective function considered is the cost of the structure, and design is based on aci 318-05. this function is minimized subjected to design constraints. a n...

The seismic safety levels provided by the three most recent editions of ACI and ASCE regulations for new moment frame structures are determined. Five special RC frames having 3, 5, 10, 15, 20 stories designed separately based on 318-99, 318-05, 318-11, associated UBC 97, 7-05, 7-10. A suit 10 consistent earthquake records is selected non-linear dynamic analysis buildings. Incremental conducted,...

This paper presents the results from the testing of a 0.4-scale “hybrid” precast concrete wall specimen under reversed-cyclic lateral loads combined with gravity loading. The specimen was designed to conform to the requirements of ACI ITG-5.2 (2009) and tested according to ACI ITG-5.1 (2007) to ultimately support the validation of hybrid precast walls for use in moderate and high seismic region...

The use of soft computing techniques is becoming more common in providing solutions to complex engineering problems such as the concrete breakout strength anchor. Available include semi-empirical equations that are known over or underpredict and some incapable generating predictive equations. This study proposes a gene expression programming (GEP)-based mathematical model predict edge capacity ...

Precast, prestressed hollow core slabs (HCS) are commonly used by the construction industry for floor and roof systems worldwide. Generally, web shear strength governs design of such members. This is because width resisting stresses relatively small prestressing force at bottom restrains flexural cracking. Although most available codes follow Mohr’s circle stress estimating cracking capacity HC...

In this paper, an optimum design algorithm is presented for reinforced concrete folded plate structures. The provisions are implemented by ACI 318-11 and 318.2-14, which quite complex to apply. variables divided into three classes. first class refers the involving plates, number of supports, thicknesses configurations longitudinal transverse reinforcement, span length each plate, angle inclinat...