Advances in Frontier Research on Engineering Structures

Editorial Board Members
Contents
Analytical and Numerical Analysis for the Vibrational Response of Timber-Concrete Composite Floor
1 Introduction
2 Model Stargey
2.1 Model
2.2 Material
2.3 ABAQUS Modeling Approach Explanation
2.4 STRAND7 Modeling Approach Explanation
3 Analytical Solution to Calculate Fundamental Frequency
3.1 Boundary Condition
4 Numerical and Analytical Results Analysation
4.1 Primary Beam Length Effect
4.2 Secondary Beam Length Effect
4.3 Number of Bays Effect
4.4 Concrete Slab Thickness Effect
5 Error Analysing
6 Conclusion
References
Research on the Integration Technology of Structural Performance Evaluation and 3D Design for Spatial Steel Structure Bridges
1 Introduction
2 3D Design of Steel Bridge Components of Spatial Shape by Plate Design Method
2.1 Steel Structure Bridge Plate Design Method
2.2 The Application of the “Plate Design Method”
3 Finite Element Simulation and Optimization of 3D Design of Spatial Steel Structure Bridge Components
3.1 Finite Element Simulation Analysis
3.2 Simulation Optimization of 3D Design
4 BIM and FEM Integrated Technology of Spatial Steel Structure Bridge Components
4.1 Integration Technology Process
4.2 Integrated Design Method
4.3 Examples of Integrated Design
5 Conclusion
References
Aseismic Design of an Out-of-Code High-Rise Building in Shanghai
1 Introduction
2 Foundation and Basement Structure Design
3 Superstructure Design
3.1 Lateral Force Resistant Structural System
3.2 Structural Calculation and Analysis
4 Determination of Structural Regularity and Main Seismic Strengthening Measures
4.1 Rule Judgment of Unit A and Unit C
4.2 Main Seismic Strengthening Measures of Unit A and Unit C
4.3 Rule Judgment of Unit B
4.4 Main Seismic Strengthening Measures of Unit B
5 Conclusion
References
Finite Element Analysis of Reinforced Concrete Slab-Rectangular Column Connections Using ABAQUS
1 Introduction
2 Test Specimens
3 Finite Element Simulations
3.1 Modeling in ABAQUS
3.2 Concrete Damage Plasticity Model
4 Finite Element Analyses Results
4.1 Load–Deflection Response
4.2 Crack Pattern
4.3 Average Shear Stress in the Critical Section
4.4 Coefficient of the Bending Moment Transferred by Eccentric Shear
5 Conclusions
References
Rail Surface Defect Detection Method Based on Deep Learning Method with 3D Range Image
1 Introduction
2 Background
2.1 Defect Detection Based on Deep Learning Method
2.2 3D Images
2.3 Net Network Architecture
3 Twin Unet & 3D+ Neural Network
3.1 Overall Network Framework
3.2 Twin Coded Information Module
3.3 Decoding Information Module
3.4 Loss Function
4 Experiment and Analysis
4.1 Experimental Environment
4.2 Establishing a Dataset
4.3 Comparative Experiment
4.4 Experimental Analysis
5 Conclusions
References
Research on Damage Mechanism and Structural Optimization of Joints in Cavity Shear Wall Structure
1 Introduction
2 Engineering Survey
3 Structural Modeling and Analysis
3.1 Calculation Assumption
3.2 Finite Element Modeling
3.3 Finite Element Model Calculation
4 Data Analysis and Processing
5 Conclusion
References
Theoretical Study on Natural Vibration Frequency of Externally Prestressed Simply Supported Steel Beams
1 Introduction
2 Classical Theoretical Analysis and Its Errors and Corrections
3 Theoretical Analysis of the Natural Vibration Frequency of Steel Beams Based on the Action Mechanism of the Prestressed System
3.1 Prestressed Components
3.2 Calculation of the Natural Vibration Frequency of the Externally Prestressed Steel Beams with Linear Coupling Cables
3.3 Influencing Factors of Natural Vibration Frequency of Externally Prestressed Steel Beams with Linear Coupling Cables
4 Analysis of Influencing Factors of Natural Vibration Frequency
4.1 Influence of Prestress on Natural Vibration Frequency
4.2 Effect of Eccentricity on Natural Vibration Frequency
4.3 Influence of the Cross-Sectional Area of the Cable on Natural Vibration Frequency
5 Conclusion
References
Finite Element Analysis of Punching Shear of Reinforced Concrete Mushroom Slab-Column Connections Using ABAQUS
1 Introduction
2 Test Specimens
3 Finite Element Method
3.1 Methodology
3.2 Concrete Damage Plasticity Model
4 Finite Element Analyses Results
4.1 Load–deflection Response
4.2 Crack Pattern
4.3 Coefficient of Bending Moment Transferred by Eccentric Shear Force
5 Conclusions
References
Research on Restoring Force Model of Built-in Steel Tube Reinforced STRC Column Joints
1 Introduction
2 Establishment of Finite Element Model
2.1 Material Constitutive Relation
2.2 Model Establishment
2.3 Verified by Experiments
2.4 Finite Element Analysis Results
3 Establishment of Resilience Model
3.1 Four Basic Assumptions
3.2 Establishment of Skeleton Curve
3.3 Determination of Unloading Stiffness and Reloading Stiffness
3.4 Hysteresis Loop Rule
4 Conclusion
References
Study on Frost Resistance of Steel-PVA Hybrid Fiber Concrete
1 Introduction
2 Experiment
2.1 Raw Materials of Experiment
2.2 Design of Mix Proportion
3 Experimental Results and Analysis
3.1 Experimental Results
3.2 Range Analysis
3.3 Factor-Index Analysis
3.4 Mechanism of High Frost Resistance of Steel—PVA Fiber Concrete
4 Conclusion
References
Experimental and Numerical Investigation of Weak-Axis Connected Steel Plate Shear Wall with Non-slotted and Partially Slotted Infill Plates
1 Introduction
2 Experimental Work
2.1 Test Specimen and Test Setup
2.2 Loading Protocol and Measurement
2.3 Cyclic Behavior of Test Specimen
2.4 Cyclic Behavior of Test Specimen
3 Numerical Analysis
3.1 Validation of FE Model
3.2 Partially Slotted Steel Plate Shear Wall
3.3 Comparison of Mechanical Performance
4 Conclusions
References
Full-Permeability Analysis of Normal Amplitude and Variable Amplitude Fracture of M24 High Strength Bolts
1 Introduction
2 Experiment Analysis
2.1 Experiment Purpose
2.2 Materials and Method
2.3 Discussion
3 Conclusion
References
Research on Health Assessment Model and Data Analysis Method of Steel-Concrete Composite Girder Bridge
1 Introduction
2 Assessment Model
2.1 Evaluation Model Based on Bridge Monitoring Scheme
2.2 Model Weights
3 Data Analysis Methods
3.1 Data Membership Vectorization
3.2 Comprehensive Assessment
4 Case Studies
4.1 Establish a Health Status Assessment Model
4.2 Data Processing and Comprehensive Evaluation
5 Conclusion
References
Finite Element Analysis of Anchor Length Detection Method Based on Parallel Seismic Methods
1 Introduction
2 Principle of Parallel Seismic Methods
2.1 Basic Principle
2.2 Calculation of Anchor Length
3 Non-destructive Testing Method for Tunnel Anchor Lengths
4 Simulation Analysis of Abaqus-Based Tunnel Anchor Length Detection
4.1 Finite Element Modelling
4.2 Point Wave Speed Processing
4.3 Linear Fit Analysis
5 Conclusion
References
Numerical Simulation of Rockburst Characteristics of Tunnel Surrounding Rock Under Dilatancy Effect
1 Introduction
2 Calculation Model, Scheme and Rock Burst Criterion
2.1 Calculation Model, Scheme and Constitutive Parameters
2.2 Rockburst Criterion
3 Result Analysis and Discussion
3.1 Influence of Dilatancy Angle on Rockburst Grade of Tunnel Surrounding Rock
3.2 Influence of Dilation on Circumferential Stress Distribution of Tunnel Surrounding Rock
4 Conclusions
References
Credibility of Estimating the Hysteretic Energy Demands of Concentrically Braced Steel Frames
1 Introduction
2 Design Overview
3 Design Standards
4 Estimation of Structural Hysteretic Energy Demand
5 Time-History Analysis
5.1 Comparison of Hysteretic Energy Analysis Value with Estimated Value
5.2 Distribution of Hysteretic Energy Dissipation in Different Members
5.3 Interlayer Distribution Model of Hysteretic Energy
6 Conclusion
References
Analysis of Key Points of Steel Structure Construction Technology in Film Engineering Projects
1 Project Overview
1.1 Geological Conditions of Foundation Pit
1.2 Ground Motion Parameters of the Project
1.3 Site Soil Type
2 Technical Analysis of Steel Structure
2.1 Basic Idea
2.2 Basic Principles
3 Analysis of Key Points of Installation and Construction Technology
3.1 The Deepening of the Steel Component Assembly Plan and the Key Points of Assembly Construction
3.2 Optimizing the Construction Sequence
3.3 Main Components Manufacturing Process and Quality Control Points
3.4 Anti-corrosion and Fire-Proof Coating Control
3.5 Steel Structure Hoisting Scheme
4 Conclusion
References
Analysis of the Influence of Foundation Pit Excavation on the Surrounding Surface Settlement and Retaining Structure
1 Introduction
2 Project Summary
3 Anaysis of Deformation Law of Underground Disphragm Wall
4 Surface Settlement Analysis
5 Relationship Between Surface Settlement Behind the Wall and Lateral Deformation of the Wall
6 Conclusion
References
Numerical Simulation with FLAC3D on Excavation Process of Underground Powerhouse of Kaluma Hydropower Station
1 Introduction
2 Rock Mass Quality Classification
3 Model of Underground Cavern Rock Mass
4 Results and Analysis
5 Conclusion
References
Study on Sound Insulation of Integrated Composite Wallboard Made of ALC and Rock Wool Panel
1 Introduction
1.1 The Template Files
2 Sound Insulation Requirements and Measurement of Enclosure Walls
3 Comparison of Sound Insulation Performance of Lightweight Concrete Walls
3.1 Foamed Cement Composite Wallboard
3.2 ALC Block Wall
3.3 Composite Wall with Rock Wool Panel Sandwiched Between Two-Layer ALC Panels 
4 Integrated Composite Wallboard ALC + Rock Wool Sound Insulation
4.1 ALC + Rock Wool Integrated Composite Wallboard Structure
4.2 Sound Insulation Experimental Scheme
4.3 Prediction of Sound Insulation Experimental Results
4.4 Experimental Results of Sound Insulation
4.5 Analysis of Sound Insulation and Coincidence Frequency of Integrated Composite Wallboard
5 Conclusions
References
Study on the Properties of Concrete with Different Admixtures in Acid Corrosive Environment
1 Introduction
2 Material and Experiments
2.1 Materials
2.2 Mix Proportion
3 Experimental Section
3.1 Design of Simulated Test
3.2 Test Method
4 Analysis of Test Results
4.1 Morphology Changes
4.2 Variation of Intensity
5 Conclusions
References
Monitoring and Analysis of Dam Deformation in Yuankou Reservoir
1 Introduction
1.1 Layout of Dam Surface Deformation Monitoring Points
1.2 Layout of Deformation Monitoring Points in Upstream Dam Slope
2 Analysis of Monitoring Results
2.1 Observation of Dam Surface Deformation
2.2 Internal Deformation of Upstream Dam Slope
3 Conclusion
References
Experimental Study on Mix Ratio Design of High Coal Gangue Content Concrete
1 Introduction
2 Materials and Methods
2.1 Experimental Materials
2.2 Experimental Method
3 Results and Discussion
4 Conclusion
References
Analysis on Reinforcement of Statically Indeterminate Truss
1 Introduction
2 Finite Element Modeling
3 Finite Element Model Analysis and Discussion
3.1 Finite Element Model Analysis
3.2 Increased Cross-Section Method
3.3 Specific Research
3.4 Discussion
4 Conclusion
References
Measurement of Velocity and Particle Size in Shock Wave Area Generated by Experimental Granular Flow Impacting on a Cylinder Based on Image Processing Methods
1 Introduction
2 Methods
2.1 Experimental Set-Up
2.2 Granular Material
2.3 Image Processing Methods
2.4 Velocity Measurement Based on Moving Images
2.5 Particle Identification Using the Image Deblurring Method
3 Results
3.1 Granular Flow Velocity
3.2 Particle Size Identification
4 Discussions
5 Conclusions
References
Analysis on Fatigue Crack of Orthotropic Steel Bridge Decks
1 Introduction
2 Crack Disease Inspection
3 Numerical Analysis of the Diaphragm
3.1 Finite Element Model
3.2 Finite Element Analysis Results
4 Conclusions
References
Research on Mechanical Properties of Steel Shell Concrete Immersed Tube Shear Connectors
1 Introduction
2 Loading Tests
2.1 Testing Apparatus
2.2 Experiment Designs
2.3 Test Data Analysis
3 Numerical Analysis of Connectors
3.1 Finite Element Modelling and Settings
3.2 Numerical Calculation Results Analysis
4 Theoretical Calculation Method Proposal
5 Conclusion
References
Research on Dam Deformation Monitoring Model Based on BP + SVM Optimal Weighted Combination
1 Introduction
2 BP Neural Network Model
3 SVM Support Vector Machine Model
4 Construction of Optimal Weighted Combination Model
5 Analysis of Examples
6 Conclusion
References
Equivalent Standard Axle Load Analysis Considering Dynamic Load Based on Vehicle Axle-Tire Vertical Acceleration Field Testing
1 Introduction
2 Vehicle Vibration Model and Dynamic Load
3 Axle-Tire Acceleration Field Test Design
3.1 Testing Road and Roughness Testing
3.2 Test Vehicles
3.3 Testing Method and Data Collection
4 Result Analysis
4.1 Vertical Axle-Tire Vibration Acceleration Temporal Analysis
4.2 Axle Load Conversion Considering Dynamic Load
5 Conclusions
References
Slope Reliability Analysis Based on Nonlinear Stochastic Finite Element Method
1 General Instructions
2 Slope Safety Analysis Method Based on Nonlinear Stochastic Finite Element Method
2.1 Local Average Method for Random Field Discretization
2.2 Viscoplastic Method
2.3 Strength Reduction Finite Element Method
2.4 Criterion for Judging Slope Instability
3 Example Analysis
3.1 A Calculation Example of Homogeneous Slope
3.2 A Calculation Example of Slope Considering Material Properties Random Field
3.3 Comparison of FS Distribution and Reliability Index Solution of M1 Method
3.4 Comparison Analysis of Reliability Indexes Obtained by M1 Method and M2 Method
4 Conclusion
References
Basic Research on Automatic Tying Equipment for Reinforced Steel Skeletons of Precast Shear Walls
1 Introduction
2 Number and Volume Ratio of Three Types of Shear Walls
3 External Profile Dimensions of Precast Shear Walls
4 Types of Prefabricated Reinforcement
5 Thickness of Steel Skeletons
6 Production Methods
7 Conclusions
References
Bridge Comparison of Erection Solutions for Steel Box Girders Spanning from Anchorage in the Sea on Shenzhen-Zhongshan Bridge
1 Introduction
2 Engineering Situations
2.1 Consolidation of Long Segment Girder
2.2 Small Segment Jack-In Method
2.3 Large Segment Jack-In Method
3 Process and Simulation Analysis of Incremental Launching Construction
3.1 Construction Process
3.2 Load Combination
3.3 The Computation
4 Conclusions
References
Analysis on Migration Mechanism of Chloride Ions in Concrete Close-End Pipe Piles
1 General Introductions
2 Transport Mechanism of Chloride Ion in Concrete
2.1 Diffusion
2.2 Convection
3 Influencing Factors of Chloride Ion Diffusion Coefficient
4 Transport Law of Chloride Ion in Concrete Pipe Pile
5 Analysis of Examples and Parameter Influence
5.1 Comparison with Origianl Survey Data
5.2 The Influence of Seepage
5.3 The Influence of Seepage Velocity
5.4 The Influence of Pipe Pile Thickness
5.5 The Influence of Diffusion Coefficient
6 Conclusion
References
Numerical Simulation Research for Rock Stability of Ventilation and Safety Tunnel of Karuma Hydropower Plant
1 General Introduction
2 Calculation Illustration
2.1 Calculation Software
2.2 Calculation Model
2.3 Material Property
3 Calculation Results and Analysis
4 Conclusion
References
Experimental Study on Mechanical Properties of the Damaged Hoop Head Mortise-Tenon Joint
1 General Instructions
2 Experiment Design
2.1 Specimen Design and Material Properties
2.2 Loading Device and Measuring Solution
3 Experiment Results and Analysis
3.1 Failure Modes
3.2 Hysteresis Curve
3.3 Skeleton Curve and Ductility
3.4 Energy Dissipation Capacity
4 Conclusions
References
Experimental Study on the Self-Repair Properties of Shape Memory Alloy Concrete Beam
1 Introduction
2 Experimental Programme
2.1 Experimental Materials
2.2 Experimental Design
2.3 Test Equipment, Instruments and Devices
2.4 Test Methods
3 Test Results and Observations
3.1 Test Results
3.2 Recovery Effect Analysis
3.3 Effect of Damage Level on Mechanical Properties of Test Beams
4 Conclusions
References
Application of ABAQUS by Using Python in Concrete-Filled Steel Tube
1 Instructions
2 Introduction of ABAQUS and Python
2.1 The Template File
3 Application
4 Verification
5 Conclusions
References
Establishment of Community Earthquake Vulnerability Assessment System
1 Introduction
2 Case Study
2.1 Seismic Risk Analysis of Xinchengzi Community
3 Conclusions
References
Research on Deformation Characteristics of SCP Foundation for HKZM Bridge
1 Introduction
2 Project Overview
3 Experiment
3.1 Experiment Design
3.2 Analysis of Test Results
4 Monitoring Data Analysis
5 Conclusion
References
Research on Vibration Design of Large Compressor Foundation
1 Introduction
2 Engineering Overview
3 Comparison of Computational Models of Two Different Finite Element Types
3.1 Build the Model
3.2 Mode Shape Comparative Analysis
3.3 Comparative Analysis of Vibration Velocity Response
4 Influence of Structural Arrangement on Vibration
4.1 Influence of Roof Thickness on Vibration
4.2 Influence of Column’s Section on Vibration
4.3 Influence of Equipment Axis and Foundation Eccentricity on Vibration
4.4 Influence of Roof Overhang Length on Vibration
5 Conclusion
References
Analysis of the Impact of Earthquakes on the Stability of Overlying Fill Slopes
1 Introduction
2 Determination of Model Dimensions and Parameters
2.1 Slope Dimensions
2.2 Boundary Conditions
3 Design of Seismic Conditions
4 Analysis of Slope Stability Under Seismic Conditions
4.1 Displacement
4.2 Stability Coefficient
5 Conclusions
References
Theoretical Study of the Reinforcement of Pre-stressed Concrete Cylinder Pipes with External Pre-stressed Strands
1 Introduction
2 Theoretical Research
2.1 Determination of Pre-stress Loss, σst,l
2.2 Calculation of Area of Pre-stressed Steel Strands
3 Applications
4 Conclusion
References
Structural Seismic Performance of Prefabricated Steel Plate Shear Wall with High Energy Dissipation
1 Introduction
2 Fabricated Steel Plate Shear Wall with High Energy Dissipation
3 Finite Element Analysis
3.1 Finite Element Model
3.2 Model Parameter and Cyclic Loading Procedure
4 Result Analysis
4.1 Failure Mode
4.2 Hysteretic Curve
4.3 Skeleton Curve
4.4 Stiffness Degradation
4.5 Displacement Ductility
4.6 Energy Dissipation Performance
5 Conclusions
References
Sensor Fault Diagnosis Method of Bridge Monitoring System Based on FS-LSTM
1 Introduction
2 Mathematical Model of Sensor Faults
2.1 Constant
2.2 Gain
2.3 Bias
2.4 Gain and Linear Drift
2.5 Noise
3 Fault Diagnosis Method of FS-LSTM
3.1 Update and Forecasting Process
3.2 Determine Network Structure Hyper Parameters
3.3 Fault Threshold
4 Numerical Example
5 Conclusion
References
Experimental Study on Inclination Test of Fiber Bragg Grating
1 Introduction
2 Principle of Fiber Bragg Grating Inclination Test
2.1 Characteristics of Fiber Bragg Grating
2.2 Principle of Fiber Bragg Grating Inclination Measurement
3 Fiber Bragg Grating Calibration Test
3.1 Experimental Steps
3.2 Test Results and Analysis
4 Indoor Model Test
4.1 Test Ideas
4.2 Experimental Steps
4.3 Experimental Results and Analysis
5 Conclusion
References
The External Prestress Effect of Curved Tendons on the Natural Vibration Characteristics of Steel Beams
1 Introduction
2 Establishment of the Vibration Equation Based on the Hamilton Principle
3 Reliability Verification of Vibration Equation
4 Finite Element Verification
4.1 Influence of Prestress Value on Natural Frequency
4.2 Influence of Prestressed Cable Section Area on Natural Frequency
5 Conclusions
References
Transverse Vibration Characteristics of Clamped-Elastic Pinned Beam Under Compressive Axial Loads
1 Introduction
2 Theoretical Derivation
3 Verification
3.1 Model Establishment
3.2 Calculation of Natural Frequency
3.3 Modes Analysis
3.4 Influence of Coupling of Constrained Stiffness and Compressive Axial Loads on Natural Frequency
4 Conclusions
References