The analysis of bored piles, or drilled shafts, at the service limit state is important when foundation settlements are critical to the operation of a structure. The t–z method is a widely used soil–structure interaction model for the analysis of drilled shaft settlement. In current practice, nominal values of soil stiffness and strength parameters are used to determine settlement based upon th...

Issues of load combinations of earthquakes and heavy trucks are important contents in multihazards bridge design. Current load resistance factor design (LRFD) specifications usually treat extreme hazards alone and have no probabilistic basis in extreme load combinations. Earthquake load and heavy truck load are considered as random processes with respective characteristics, and the maximum comb...

This paper summarizes the recent work by the first author’s research group related to the performance evaluation of existing bridges under vehicle dynamic effects. Based on the data from short-term monitoring of existing bridges, a framework to estimate the extreme structure responses from the live load in a mean recurrence interval is developed in the first part. The Gumbel distribution of the...

Grillages are widely used in various structures. In this research, the Colliding Bodies Optimization (CBO) and Enhanced Colliding Bodies Optimization (ECBO) algorithms are used to obtain the optimum design of irregular grillage systems. The purpose of this research is to minimize the weight of the structure while satisfying the design constraints. The design variables are considered to be the c...

Computational cost of metaheuristic based optimum design algorithms grows excessively with structure size. This results in computational inefficiency of modern metaheuristic algorithms in tackling optimum design problems of large scale structural systems. This paper attempts to provide a computationally efficient optimization tool for optimum design of large scale steel frame structures to AISC...

in this research, the charged system search (css) and enhanced charged system search (ecss) algorithm are used to obtain the optimum design of irregular grillage systems with different spacing and various boundary conditions. the cross-sectional properties of the beams are selected as the design variables and the weight of structure is used as the objective function. the displacement limitation...

In this article, an Advanced Charged System Search (ACSS) algorithm is applied for the optimum design of steel structures. ACSS uses the idea of Opposition-based Learning and Levy flight to enhance the optimization abilities of the standard CSS. It also utilizes the information of the position of each charged particle in the subsequent search process to increase the convergence speed. The objec...

The objective of this paper is to propose and illustrate feasibility, approach, validation as per prevailing codes design standards, specification rehabilitate bridge pier cap by using Ultra-High Performance Concrete (UHPC). evaluation existing caps bearings indicates that the complete removal bearing undesirable due 1) massive size 2) difficulty in cutting through thick components 3) deeply an...

This article presents a procedure for the reliability assessment of cold-formed steel beams based on Direct Strength Method (DSM) and Effective Section (ESM). Using comprehensive database, statistical analysis test results was performed to determine properties professional factor random variable. The parameters related material strength, geometric load effects were obtained from established ref...

Jambi University is one of the State Universities in Indonesia which currently phase sustainable development focusing on increasing development, especially water resource infrastructure. Planning for reservoirs with reinforced concrete an option long-term infrastructure planning. The planned reservoir form a that functions as container storing clean treatment system at University. focuses desig...