Reinforcement Learning (RL) refers to learning to behave optimally in a stochastic environment by taking actions and receiving rewards [1]. The environment is assumed Markovian in that there is a fixed probability of the next state given the current state and the agent’s action. The agent also receives an immediate reward based on the current state and the action. Models of the next-state distr...

Simply put, reinforcement learning (RL) is a term used to indicate a large family of dierent algorithms RL that all share two key properties. First, the objective of RL is to learn appropriate behavior through trialand-error experience in a task. Second, in RL, the feedback available to the learning agent is restricted to a reward signal that indicates how well the agent is behaving, but does ...

This study presents a design criterion developed for fatigue strengthening of a 120-year-old metallic railway bridge in Switzerland and presents a pre-stressed un-bonded reinforcement (PUR) system developed to apply the strengthening. The PUR system uses carbon fiber reinforced polymer (CFRP) plates; however, unlike conventional pre-stressed CFRP reinforcement methods, preparation of the existi...

in this paper attempts have been done to create a mortar with relatively high uniaxial compressive strength (ucs), easy casting, high flexibility, instant hardening, low cost and easy availability. the main use of this material is to physically model the mechanical behavior of jointed rock-like blocks. the effect of four parameters such as joint roughness coefficient (jrc), bridge length (l), b...

With the continuous improvement of bridge construction technology in our country, although service life has been greatly extended, mechanical connection steel bar is still stage straight thread connection, which nearly 30 years behind that foreign countries. According to development status and application requirements China, it great practical significance explore new technologies methods solve...

Three-dimensional model is established with finite difference method to simulate construction process based on design and construction plans of existing overpass pile foundation adjacent to certain large-section railway tunnel in Chengdu, China. Ground, isolation pile, main bridge pier and ramp pile near the tunnel are taken as research object, and surface settlement amount, displacement change...

Flanged shear walls are used extensively in moderate- and high-rise buildings to resist lateral loads induced by earthquakes. The seismic performance of many buildings is, therefore, closely linked to the behavior of the reinforced concrete walls. They must be carefully designed to provide not only adequate strength, but also sufficient ductility to avoid brittle failure under strong lateral lo...

Accelerated bridge construction (ABC) has attracted much attention in China as a new and efficient method. However, the seismic performance of connections between precast piers other structures limits application ABC medium high zones. In this paper, quasi-static test was conducted to investigate differences cap–column socket connection (PSC) specimen, which reinforced an embedded RC column-to-...