Abstract
The intelligent evaluation system of existing reinforced concrete bridge “BLP” is a special software for the load-bearing capacity rapid analysis and evaluation of the existing reinforced concrete bridge, which was developed by the Highway Research Institute of the Ministry of Transport. Based on the parametric modelling method, it can quickly and easily establish the finite element plane model of the bridge structure for the static analysis of ultimate bearing capacity limit states and serviceability limit state, under variety norms. And it can easily and quickly build variable-section beams and rebars, with the special module. According to the comprehensive modification method of the load-bearing capacity evaluation, it can automatically recommend checking sections, and automatically calculate partial modification coefficient of resistance effect, and conveniently judge the safety coefficient of the sections, and quickly get the results of bridge load-bearing capacity. In summary, this system can significantly improve the work efficiency and accuracy of load-bearing capacity for exiting reinforced concrete bridge. This paper introduces in detail the characteristics of the intelligent analysis technology, calculation principle and real bridge application examples of the system.
Highlights
The existing bridges in one of the following situations [1], the load-bearing capacity should be inspected and evaluated: 1) Bridges with technical conditions of grades 4 and 5; 2)
The accuracy of the results of this method is relatively high, the cost is relatively high, which is not suitable for large-scale and regular assessment of the carrying capacity of bridges. This software was based on the comprehensive modification method of the load-bearing capacity evaluation for the existing reinforced concrete bridge
The operation of this software mainly includes four steps: 1) Establishing finite element models, 2) Calculating resistance reduction coefficients based on bridge defects, materials, and state parameters, 3) Calculating load effects and resistance effects based on current load conditions and design loads, 4) Automatically comparing the load effect and the resistance effect after modification to judge the load-bearing capacity
Summary
The existing bridges in one of the following situations [1], the load-bearing capacity should be inspected and evaluated: 1) Bridges with technical conditions of grades 4 and 5; 2). The accuracy of the results of this method is relatively high, the cost is relatively high, which is not suitable for large-scale and regular assessment of the carrying capacity of bridges This software was based on the comprehensive modification method of the load-bearing capacity evaluation for the existing reinforced concrete bridge. Assessing the bearing capacity of a bridge ,this method is practical, economical, reasonable, and reliable, which has changed the situation that the evaluation of the loasbearing capacity of highway bridges relied too much on load test identification, and can generally saves 50% to 60% of the funds for the load-bearing capacity of the bridge[2] The operation of this software mainly includes four steps: 1) Establishing finite element models (including steel bars), 2) Calculating resistance reduction coefficients based on bridge defects, materials, and state parameters, 3) Calculating load effects and resistance effects based on current load conditions and design loads, 4) Automatically comparing the load effect and the resistance effect after modification to judge the load-bearing capacity
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