Complex bedding properties and in situ stress conditions of shale formation lead to complex hydraulic fracturing morphologies. However, due the limitations traditional numerical methods, simulation still needs further development. Based on this, liquid–solid interaction modes SPH governing equations considering force have been introduced. The smoothing kernel function method is improved by introducing fracture mark ξ, which can realize rock processes. boundary applied mapping “stress...

To overcome limitations inherent in existing mechanical performance prediction models for pervious concrete, including material constraints, limited applicability, and inadequate accuracy, this study employs a deep learning approach to construct Convolutional Neural Network (CNN) model with three convolutional modules. The primary objective of the is precisely predict 28-day compressive strength concrete. Eight input variables, encompassing coarse fine aggregate content, water admixture...

A high damping rubber bearing (HDRB) is widely utilized in base-isolation structures due to its good energy dissipation capacity and environmentally friendly properties; however, it incapable of isolating the vertical vibration caused by earthquakes subways effectively. Thick bearings with a low shape factor have become one important isolation forms. This paper provides an experimental comparative study on (HDRB-LSF), thick lead–rubber (TLRB), (LRB). The abilities above are analyzed...

Approximate analytical solutions are presented for the transient thermoelastic problem of rectangular plates with time-dependent convection and radiation boundaries. To include nonlinear boundary, whole heating process is divided into several time steps, a linearized approximation used to simplify term each step. The one-dimensional temperature along thickness direction solved using technique separation variables. displacement stress obtained by applying state-space method three-dimensional...

In a prestressed concrete bridge, the magnitude of prestress force (PF) decreases with time. This unexpected loss can cause failure bridge which makes identification (PFI) critical to evaluate safety. However, it has been difficult identify PF non-destructively. Although some research shown feasibility vibration based methods in PFI, requirement having determinate exciting these hinders applications onto in-service bridges. Ideally, will be efficient if normal traffic could treated as an...

Prestress force identification (PFI) is crucial to maintain the safety of prestressed concrete bridges. A synergic method has been proposed recently by authors that can determine PF and excitation simultaneously in beams with good accuracy. In this paper, ability application box-girder bridges demonstrated. reasonable assumption made capture similarity dynamic behavior bridge a beam under certain loading scenario, feasibility for affirmed. comprehensive laboratory test program conducted,...

The world has witnessed an alarmingly increasing number of serious natural hazards. In the aftermath a hazard, relevant authorities/agencies face, among others, challenging tasks rapidly evaluating and assessing damages to infrastructures restoring their essential functionality operation. availability reliable, high-quality structural operational/maintenance data structure its health, before after can be instrumental in rapid assessment damaged structure. We collectively refer, this paper,...

<abstract> <p>The detection effect of the transient electromagnetic method is ambiguous in engineering applications due to existence interference sources, so explaining influence these fixed sources on crucial. In this paper, response characterisation signals are thoroughly investigated. First, secondary field generated by analyzed, and a typical source calculated. Then, sensitivity analysis curve carried out. Finally, mathematical superposition for multiple proposed verified....

Prestress force dominates the carrying capacity of concrete girders, and is vital for bridge health monitoring. Many vibrational-based methods have been proposed to determine prestress using responses induced by known excitations, which means that they can barely use normal traffic in-service bridges as excitation achieve long-term Moreover, most studies are based on beam theory, may not be precise plate-like bridges. Hence, this paper establishes a motion equation prestressed slab via...

Moving load and structural damage assessment has always been a crucial topic in bridge health monitoring, as it helps analyze the daily operating status of bridges provides fundamental information for safety evaluation. However, most studies research consider these issues two separate problems. In practice, unknown moving loads usually coexist influence vibration synergically. This paper proposes an innovative synchronized method that determines damages forces simultaneously. The firstly...

This paper treats the vibration characteristics of three different types asymmetric buildings and investigates feasibility applying an innovative vibration‐based multicriteria approach‐based damage index (MCA‐DI) technique to detect damage. combines a modified form traditional modal strain energy method (MSEM) developed by decomposing mode shapes into lateral vertical components together with flexibility define new indicator. Lastly, dynamic behavior building instances, including 10‐storey...