下载专区
Qr Code
- Current Discuss
- First Published
- Album Paper
-
Study on Axial Compression Behavior of H-Shaped Composite Short Columns with RCFST Flanges and Cellular Double Webs
JI Jing, CHE Weizhong, JIANG Liangqin, LIU Yingchun, ZHANG Zhanbin, CHU Xuan
2025,42(2):1-11, DOI: 10.3969/j.issn.1673-9469.2025.02.001
Abstract:
To study the axial compression performance of H-shaped composite short columns with concrete-filled rectangular steel tubular flanges and double cellular webs, 19 full-scale specimens were designed with control parameters including slenderness ratio, confinement effect coefficient, steel yield strength, concrete axial compressive strength, hole-height ratio, and spacing-height ratio. Based on simplified steel constitutive models and constrained concrete nonlinear constitutive models, numerical simulations of 12 H-shaped cellular composite columns with concrete-filled rectangular steel tubular flanges were conducted using ABAQUS finite element software to obtain load-displacement curves of specimens. Through comparison with existing experimental data, the applicability and accuracy of the adop-ted material constitutive models and finite element modeling results were verified. Further parametric analyses were performed to investigate the influence of different parameter variations on the axial bearing capacity of this new type of short columns, thereby revealing the mechanical processes, failure modes, and load-bearing mechanisms. The results indicated that the bearing capacity significantly increased with the confinement effect coefficient, steel yield strength, concrete axial compressive strength, and spacing-height ratio but decreased with the slenderness ratio and hole-height ratio. All specimens exhi-bited similar failure patterns: outward bulging of flanges with convex failure morphology, and cellular steel webs developing cracks extending bilaterally along the web plane from circular holes. Finally, statistical regression analysis based on the 1stOpt software was conducted to establish a bearing capacity formula for this composite short column type, providing theoretical basis for practical engineering applications.
-
Axial Compression Test and Simulation of L-Shaped Steel Reinforced Concrete Columns After Freeze-Thaw Cycles
LI Wen, WANG Xingzhuo, GE Nan, TENG Zhenchao, ZHANG Yunfeng, WANG Tong
2025,42(2):12-18, DOI: 10.3969/j.issn.1673-9469.2025.02.002
Abstract:
In order to investigate the influence of freeze-thaw cycles on the mechanical performance of steel-reinforced concrete (SRC) irregular-shaped column structures, based on the axial compression tests of five L-shaped SRC columns after freeze-thaw and the simulation study of 14 L-shaped SRC co-lumns, the parameters including concrete strength, reinforcement ratio and steel content were analyzed. According to the results, the calculation formula for the post-freeze-thaw bearing capacity was established. The research results show that the freeze-thaw cycles have a significant impact on the durability and structural performance of SRC components, manifested as the damage of the components gradually deepening from the inside to the outside, and the ultimate axial compression bearing capacity decreases significantly after 50 freeze-thaw cycles. The calculation values of the bearing capacity formula proposed based on the finite element results have an error within 5%, which can reflect the change of ultimate bearing capacity and provide a reference for the application of this structure in cold regions.
-
Experimental Study on Rheological Mechanical Properties of Deep Granite in Beishan
ZHU Qizhi, CAO Jiaxiang, ZHAO Xingguang
2025,42(2):19-27,36, DOI: 10.3969/j.issn.1673-9469.2025.02.003
Abstract:
Taking the core samples from the deep strata of the northern mountains of Gansu Province as the research object, this study explores the short-term and long-term mechanical properties of the North Mountain granites under different confining pressure conditions, thereby providing theoretical support for the deep construction of the underground laboratory for nuclear waste geological disposal in the North Mountain. Conventional triaxial compression tests and creep tests were carried out to investigate the mechanical characteristics of the North Mountain granites under different confining pressure conditions. The main conclusions are as follows: (1) In the triaxial compression tests, the North Mountain granites experienced five stages: initial crack closure, linear elasticity, stable crack propagation, unstable crack propagation, and post-peak softening. With the increase of confining pressure, the typical characteristic stress and peak strain increased significantly, showing a clear confining pressure effect, and could be well described by linear fitting. (2) The multi-stage creep tests revealed that under different failure stress levels, the North Mountain granites experienced the attenuation stage, the steady-state stage, and the acceleration stage, with the attenuation stage and the steady-state stage alternating; and (3) In terms of macroscopic failure characteristics, under low confining pressures, the North Mountain granites exhibited mixed failure of tension and shear; under higher confining pressures, macroscopic main cracks penetrating the surface of the specimens appeared, presenting a typical shear failure mode.
-
Influence of Matrix and Boulder Strength on Mechanical Properties of Bimrocks Type Rocks
ZHAO Bohan, WEI Jihong, CAO Yao, JIN Chunlin, HUANG Jiahao, YU Keqiang
2025,42(2):28-36, DOI: 10.3969/j.issn.1673-9469.2025.02.004
Abstract:
To study the influence of the strength of the matrix and the block stones on the mechanical properties of bimrocks, block stones and matrix were prepared with different ratios of cement and quartz sand. Two matrix ratios and four stone contents were used to make specimens for indoor uniaxial tests and direct shear tests. The test results show that under uniaxial compression conditions, when the stone content is 50%, the specimens with matrix ratios of 1∶3 and 3∶1 have reached the maximum values of uniaxial compressive strength and elastic modulus, and the failure types of the specimens are all shear failure. Under direct shear conditions, the low-strength group (cement∶sand ratio of 1∶3) shows a trend of decreasing shear strength with the increase of stone content under all normal forces. The high-strength group (cement∶sand ratio of 3∶1) also basically conforms to this trend. Both matrix ratio specimens show a trend of increasing cohesion first and then decreasing with the increase of stone content, and the internal friction angle shows an overall decreasing trend. Under the same stone content, the cohesion of the high-strength group is respectively increased by 222.86%, 200.36%, 784.86%, and 383.14% compared with the low-strength group; the internal friction angle is reduced by 25.29%, 22.35%, 26.43%, and 24.26%, respectively.
-
Numerical Simulation of Foamed Mud Seepage Based on PFC-CFD Coupling
YUAN Junping, XU Xingyu, CHEN Long, DING Guoquan, LIN Yanling
2025,42(2):37-45, DOI: 10.3969/j.issn.1673-9469.2025.02.005
Abstract:
Based on the PFC3D software, a one-dimensional foam mudstone seepage model was established, and the fluid-solid coupling simulation was carried out. The dynamic adjustment of bubble particle size was realized through the FISH function. In addition, a continuous grouting algorithm was developed, and the uniformity and continuity of mudstone distribution were verified. The seepage process of foam mudstone in soil layers was successfully simulated. Regarding the problem that the formation time of mud film is difficult to determine, three types of calculation termination conditions were proposed. By comparing the results of indoor experiments and numerical simulations, the rationality of the model was verified.
-
Evaluation of the Treatment Effect of Loess Foundation Compaction Pile Method Based on Rayleigh Wave Method
LIU Pengyu, RAN Saijia, XIONG Baolin, LIU Jiale
2025,42(2):46-52, DOI: 10.3969/j.issn.1673-9469.2025.02.006
Abstract:
To quickly detect the effectiveness of the compaction pile method for loess foundation treatment, this article selects a compaction pile method foundation treatment area on the Chengwei Expressway as the experimental area, and uses the multi-channel transient Rayleigh wave method for rapid detection. In order to distinguish the treatment effects of soil between piles and compacted piles, two types of point distribution methods were used for on-site experimental research in the test area. The detection data was processed in different regions using formulas to obtain the average wave velocity in each region. By analyzing the contour map, it can be concluded that the wave velocity at the compacted pile is larger, while the wave velocity at the centroid of the equilateral triangle pile is smallest. This is consistent with the actual situation, and the quality of the pile can be well tested. The results of wave velocity measurement were fitted and compared with in-situ test data. When the wave velocity reached 195 m/s or above, the results indicated that the foundation treatment effect was qualified. At the same time, it was found that there was a good correlation between wave velocity, bearing capacity, collapsibility coefficient, and dry density. This provides a possibility for using Rayleigh wave velocity to estimate the foundation bearing capacity, collapsibility coefficient, and dry density.
-
Analysis of Vibration Characteristics of Surrounding Rock with Varied Properties During Shield Tunnel Excavation
JIN Yangwenrun, LIU Changchun, ZHANG Hong, LIU Jun, XU Zequan, ZHEN Mengyang
2025,42(2):53-59,66, DOI: 10.3969/j.issn.1673-9469.2025.02.007
Abstract:
To gain a deeper understanding of the influence of shield tunneling vibration on different strata, on-site vibration signal monitoring was conducted under typical working conditions of shield machines in soft strata, strata with soft upper and hard lower layers, and medium-hard sandstone strata, taking a certain shield construction project as an example. When analyzing the vibration signals, consi-dering the instantaneous non-stationarity of the vibration signals during shield construction and the adaptive advantages of the Hilbert-Huang Transform analysis method, the Empirical Mode Decomposition (EMD) method was used to deeply analyze the vibration signals at the measurement points in the three strata. The analysis results show that the vibration signal frequencies of shield construction in the three rock strata mainly concentrate in the range of 0 to 185 Hz, and in the EMD components of the signals, the Intrinsic Mode Function (IMF) 2 to 4 frequency band components dominate, covering the majority of the signal energy. During the shield tunneling process, the instantaneous energy range and the main vibration frequency band of each stratum are approximately the same. As the stratum type gradually changes from soft rock to hard rock, the shear wave velocity of the stratum gradually increases, and the peak value of the instantaneous energy of the stratum vibration also gradually increases. Among the three strata, the hard rock stratum has the largest energy, the medium-hard rock stratum has the second largest energy, and the soft soil stratum has the smallest energy.
-
Research on Semi-active Control System of Bridge and Seismic Self-centering Performance Based on Electromagnetic Inertial Mass Damper
SHI Xiaodong, SUN Longpan, LI Muyuan, LIU Xiaohang, GUO Jin
2025,42(2):60-66, DOI: 10.3969/j.issn.1673-9469.2025.02.008
Abstract:
To verify the feasibility of applying the Electromagnetic Inertia Mass Damper (EIMD) to the semi-active control of bridge structures, an experimental study was conducted to verify the accuracy of its mechanical model and the sensitivity of its parameters. A new control algorithm was proposed and an EIMD-continuous girder bridge control system was designed. Taking an actual engineering continuous girder bridge as the object, the control effect of the relative displacement of the bridge structure's piers and girders under earthquake action was evaluated through numerical simulation methods, and the research on the self-resetting performance of the bridge structure was carried out. The results show that compared with the traditional passive control methods, the absolute value of the relative displacement of the bridge structure's piers and girders is significantly reduced, which shows excellent shock absorption effect. The proposed new control algorithm has a significant improvement effect on the self-resetting function of the bridge structure.
-
Numerical Study on the Hazard of Fireball Caused by Leakage of High-Pressure Natural Gas Pipeline
WANG Lili, GAO Zhaoji, MA Songhao, FU Shibo, HU Fangwen, WANG Huajie
2025,42(2):67-72, DOI: 10.3969/j.issn.1673-9469.2025.02.009
Abstract:
Based on the thermal dose criterion, the mathematical model of flash fireball is established. Using MATLAB programming, the thermal radiation dose of dynamic flash fireball is calculated programmatically. The influences of leakage aperture, pipeline operating pressure and ambient temperature on the thermal radiation hazard range of the fireball are studied, and the boundary range of eight hazard areas under the studied conditions is obtained according to the critical thermal radiation dose. The results show that the critical thermal radiation hazard radius of flash fireball is approximately linearly positively correlated with the leakage aperture and pipeline medium transportation pressure, and the leakage aperture exhibits the greatest influence on the critical thermal radiation hazard radius.
-
Study on Unloading Technology of a Coal Conveying Trestle Reconstruction and Reinforcement Project
MENG Wenqing, ZHANG Mingyu, CUI Hanlong, LU Zhongke
2025,42(2):73-79, DOI: 10.3969/j.issn.1673-9469.2025.02.010
Abstract:
To enhance the collaborative working performance of the newly added brackets and supports on a certain coal conveying bridge under load conditions and to reduce the reinforcement volume of the original structure, this study utilized jacks to implement load relief on the original structure. Through simulation using finite element software with different levels of load relief and relief methods, the changes in internal forces of members, jack readings, and the number of over-limit components were syste-matically compared. The results show that when the deformation of the original structure returns to 0 mm, the load relief degree is optimal, which can simultaneously reduce the internal forces of the structure and decrease the reinforcement workload; during construction, a scheme of overall proportional displacement load relief can be adopted, which enables the internal forces and displacements to change linearly, achieving a safe and controllable transition of the structure to the target load relief state.
-
Research on Roof Breakage and Control of the Fully Mechanized Mining Face in a Deep Coal Mine in Kailuan, Tangshan
LYU Yan, GUO Yanhua, WU Chao, SHI Huawang
2025,42(2):80-88, DOI: 10.3969/j.issn.1673-9469.2025.02.011
Abstract:
An in-depth study was conducted on issues such as the determination of the basic roof fracture step distance, the structural form of the basic roof and the reasonable working resistance of the supports in the main face of a certain deep coal mine in Kailuan. The calculation formula for the basic roof fracture step distance was derived, a judgment method for the structural form of the basic roof in the main face was established, and the calculation formula for the working resistance of the supports under different structural forms of the basic roof was constructed. The results show that the initial fracture step distance of the roof of the working face is 26.7 m, and the periodic fracture step distance is 15.5 m. When the mining height is less than 4.52 m, the basic roof is prone to form a "masonry beam" structure, and when the mining height is greater than 4.52 m, the basic roof will enter the collapse zone in the form of a "cantilever beam". The influence of the fracture step distance of the basic roof and the support control distance on the working resistance of the supports under the two structural forms was analyzed, and it was determined that the reasonable working resistance of the supports in the 46092 working face should not be less than 10 851 kN. The rated working resistance of the existing supports is 10 000 kN, which is slightly insufficient in some areas of the working face.
-
Statistical Analysis of Seismic Data Based on Folium Geographic Information Visualization
ZHOU Yangxin, LI Yongqiang, LI Mingji, PAN Hongxu, XU Yan, CHEN Bo
2025,42(2):89-93, DOI: 10.3969/j.issn.1673-9469.2025.02.012
Abstract:
To conduct a more clear statistical analysis on the distribution of earthquakes and the characteristics of focal depths in China, based on the earthquake data published by the China Earthquake Administration, taking the data of earthquakes above magnitude 5.0 in China and surrounding areas from 2011 to 2022 as an example, we use the Python third-party library Folium for map data visualization to visualize the earthquake data and present the statistical results on the map. This enables the visualization of earthquake-related data on the map. From the visualization results of earthquake data, it can be more clearly seen that large and medium-sized earthquakes in China are active, with a wide distribution range and shallow source depths.
-
Analysis of Tensile Mechanical Property of GH3536 Alloy Fabricated by Selective Laser Melting
WU Mingchun, ZHANG Kai, ZHENG Bailin
2025,42(2):94-100,112, DOI: 10.3969/j.issn.1673-9469.2025.02.013
Abstract:
Utilizing Selective Laser Melting (SLM) technology, the GH3536 alloy specimens for tensile tests were fabricated by selective laser melting technology. The differences in tensile mechanical properties under different forming angles were tested. After the horizontal formed specimens were subjected to hot isostatic pressing treatment (1 175 ℃, 160 MPa, and 1 h furnace cooling), the specimens without treatment (i.e., deposited state specimens) were compared. The reasons for the changes in material properties after the treatment were analyzed. The tensile curves of GH3536 alloy with randomly distributed crystal orientations were calculated by the crystal plasticity finite element method. Combined with the VRH averaging method for the estimation results of elastic modulus, it was found that the material properties after hot isostatic pressing treatment were close to isotropic.
-
A Quantitative Study on the Emotional Comfort Degree of the Distance-to-Height Ratio of Rural Hutongs
ZHANG Jing, LI Shikun, WHANG Mincheol
2025,42(2):101-106, DOI: 10.3969/j.issn.1673-9469.2025.02.014
Abstract:
In order to quantify the influence of the distance-height ratio of rural hutong space on human emotional comfort, based on the actual situation of rural areas in southern Hebei Province, three kinds of hutong spaces with different distance-height ratios were designed. Thirty-two subjects were invited to participate in a 2D virtual experience, during which their emotional changes were recorded. Both subjective emotional scale data and physiological data were collected to jointly assess spatial perception abi-lity and emotional comfort levels. The results from the subjective emotion scale showed that when D/H<1, subjects perceived the space as narrower, showing lower emotional comfort (3.16±0.22). When 1<D/H<3, the perceived spaciousness increased with higher emotional comfort (5.06±0.17). When D/H approached 1, emotional comfort was intermediate (4.13±0.09), indicating optimal perceived proportionality. Physiological measurements correlated with the subjective scale results, revealing sympathetic/parasympathetic nervous system responses underlying the observed emotional comfort variations. This study demonstrates that optimally proportioned hutong spaces significantly enhance emotional comfort, modulate autonomic nervous system responses, and promote physical-mental wellbeing. These findings provide empirical evidence for proportion-oriented design of rural street spaces.
-
Relationship Between Environmental Design Perception Elements and Aesthetic Emotions Based on Regression Analysis
2025,42(2):107-112, DOI: 10.3969/j.issn.1673-9469.2025.02.015
Abstract:
The relationship between the perceptual elements of environmental design and aesthetic emotions was explored, providing a basic framework for the application of generative artificial intelligence in architectural and environmental design. Through questionnaire surveys, data on eight perceptual elements including spatial sense, brightness sense, scale sense, rhythm sense, order sense, variability, colorfulness and naturalness, as well as six emotional indicators including security sense, pleasure sense, attractiveness, interest sense, impression sense and dependence sense were collected. The research using multiple linear regression analysis and multi-layer perceptron regression model found that the sense of order significantly enhanced the sense of security, variability and naturalness improved the sense of pleasure, and rhythm and variability stimulated the sense of interest. These results provide a reference for the optimization of generative artificial intelligence algorithms, and are helpful for designing design schemes that are more emotionally resonant and user-centered.
建筑智能感知专栏
Journal Introduction
Organizer：河北省教育厅
Governing Body：河北工程大学
Chief editorial unitf：练继建
Address：河北省邯郸市经济技术开发区太极路19号河北工程大学行政服务中心4层
Postal Code：056038
Phone：0310-3969121、3969124
Email：journal-1@hebeu.edu.cn
CN：13-1375/N
Most Read
- Numerical simulation of the single pile static load test based on ABAQUS software
- Environmental implication of PAHs in surface water of Dongwushi reservoir in Handan
- Adaptive differential evolution algorithm
- 1
- Research on indoor lighting environment of campus buildings on the basis of Ecotect simulation analysis
- Study of displacement boundary stress effects on the transient thermal stress of 2D-FGM plate
- Ultimate bearing capacity of suction caisson in saturated sand
- Analysis and modeling of magnetism and solid coupling for switched reluctance motors
- Analysis of Extreme Hydrometeorological Characteristics in Huaihe River Basin in Recent 70 Years
- Effects of recycled coarse aggregate size on early anti-crack performance of recycled aggregate concrete
External Links