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钢管混凝土(单圆管)肋拱面内极限承载力的参数分析

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铁道学报 2004年第4期26卷 87-92页

作者：陈宝春秦泽豹福州大学土木建筑工程学院福建福州350002 福建工程学院土木系福建福州350014

应用双重非线性有限元分析方法对钢管混凝土(单圆管)肋拱受力全过程的非线性性能与极限承载力进行了参数分析。分析的参数有矢跨比、长细比、含钢率以及加载方式。分析结果可供提出极限承载力实用算法和工程应用参考。

关键词：钢管混凝土拱非线性极限承载力参数分析

Advancements in machine learning for material design and process optimization in the field of additive manufacturing

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china Foundry 2024年第2期21卷 101-115页

作者： Hao-ran Zhou Hao Yang Huai-qian Li Ying-chun Ma Sen Yu Jian shi Jing-chang cheng peng Gao Bo Yu Zhi-quan Miao Yan-peng Wei National Key Laboratory of Advanced Casting Technologies Shenyang Research Institute of Foundry Co.Ltd.CAMShenyang 110022China department of Mechanical engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Space physics Beijing 100076China School of Materials Science and engineering Nanyang Technological University639798Singapore

Additive manufacturing technology is highly regarded due to its advantages,such as high precision and the ability to address complex geometric ***,the development of additive manufacturing process is constrained by issues like unclear fundamental principles,complex experimental cycles,and high *** learning,as a novel artificial intelligence technology,has the potential to deeply engage in the development of additive manufacturing process,assisting engineers in learning and developing new *** paper provides a comprehensive overview of the research and applications of machine learning in the field of additive manufacturing,particularly in model design and process ***,it introduces the background and significance of machine learning-assisted design in additive manufacturing *** then further delves into the application of machine learning in additive manufacturing,focusing on model design and process ***,it concludes by summarizing and forecasting the development trends of machine learning technology in the field of additive manufacturing.

关键词： additive manufacturing machine learning material design process optimization intersection of disciplines embedded machine learning

Numerical Tests of Fracture Saturation in reinforced Concrete Structure

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Numerical Tests of Fracture Saturation in Reinforced Concret...

Fluid-solid coupling numerical simulation of micro-disturbance grouting treatment for excessive deformation of shield tunnel

2.07国际计算力学研讨会

作者： Juanxia Zhang~(1*) chun’an Tang~2.Xiuyan Zhou~1 Xianzhang Guo~3 1 Northeastern university at Qinhuangdao Hebei Qinghuangdao 066004 {2. 2.department of Hydraulic and civil engineering of dalian university of technology dalian 1602. {2. 3 School of resource and civil engineering of Northeastern university Shenyang 11000 {2.

＜正＞Cracking significantly affects the behaviors of reinforced concrete structures and periodically distributed fracture spacing phenomenon exist in the failure mode of the reinforced concrete structure,In this paper,a three dimension numerical test code named realistic Failure process Analysis was used to study the mechanisms of the fracture nucleation,formation,infill and saturation of the reinforced concrete structure. The numerical test results agree well with the experimental result not only on failure mode but also on the stress-strain distribution *** stress field distribution is gained by five numerical tests results for the samples with different crack spacing,and in which it can be indicated the form mechanisms of fracture spacing phenomenon,and the numerical tests give the stress distribution rules by the ratio of fracture spacing to concrete protection thickness of the reinforced concrete samples.

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Underground Space 2024年第6期19卷 87-100页

作者： Yanjie Zhang Zheng Cao chun Liu Hongwei Huang College of civil engineering and Architecture Henan University of TechnologyZhengzhou 450001China School of Earth Sciences and engineering Nanjing UniversityNanjing 210023China Key Laboratory of Geotechnical and Underground engineering of Ministry of Education Tongji UniversityShanghai 200092China department of Geotechnical engineering College of Civil EngineeringTongji UniversityShanghai 200092China

Micro-disturbance grouting is a recovery technique to reduce the excessive deformation of operational shield tunnels in urban *** grout mass behaves as a fluid in the ground before hardening to form a grout–soil mixture,which highlights the necessity of using fluid–solid coupling method in the simulation of grouting *** a discrete element modeling environment,this paper proposes a novel fluid-solid coupling method based on the pore density flow *** demonstrate the effectiveness of this method,it is applied to numerical simulation of micro-disturbance grouting process for treatment of large transverse deformation of a shield tunnel in Shanghai Metro,*** simulation results reveal the mechanism of recovering tunnel convergence by micro-disturbance grouting in terms of compaction and fracture of soil,energy analysis during grouting,and mechanical response of soil-tunnel interaction ***,the influence of the three main grouting parameters(i.e.,grouting pressure,grouting distance,and grouting height)on tunnel deformation recovery efficiency is evaluated through parametric *** order to efficiently recover large transverse deformation of shield tunnel in Shanghai Metro,it is suggested that the grouting pressure should be about 0.55 Mpa,the grouting height should be in the range of 6.2.7.0 m,and the grouting distance should be in the range of 3.0–3.6 *** results provide a valuable reference for grouting treatment projects of over-deformed shield tunnel in soft soil areas.

关键词： Fluid-solid coupling Discrete element method pore density flow Micro-disturbance grouting Soil-tunnel interaction

Effect of reinforcement Speciality on Average Fracture Spacing of reinforced Concrete Specimen

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Effect of Reinforcement Speciality on Average Fracture Spaci...

periods and Energy Dissipations of a Novel TLD rectangular Tank with Angle-adjustable Baffles

第五届国际材料与热加工物理模拟及数值模拟学术会议

作者： Juanxia ZHANG 1 a chun’an TANG2.b Xianzhang GUO3 c Xiuyan ZHOU1 d Shengguang ZHUO1 a Yandong pENG1 a 1Northeastern university at Qinhuangdao Qinhuangdao {2. 066004) 2.3} of Hydraulic and civil engineering of dalian university of technology dalian {2. 1.602.) 3 School of resource and civil engineering of Northeastern university Shenyang {2. 110004)

A numerical test code named rFpA （realistic Failure process Analysis） was used to investigate the crack distribution rule of the reinforced concrete specimen under axial tension. The results indicate that the periodically distributed fracture spacing phenomenon exists in the failure process of the reinforced concrete structure and the effect of reinforcement characteristic on the mechanical behavior and average crack spacing of reinforced concrete specimen were also studied with five samples with different elastic modulus value of reinforcement. The elastic modulus value of reinforcement is considered to be an important factor not only to significantly influence on the average crack spacing but also to control the ultimate strain of the specimen, in addition, the average crack spacing is increased and the ultimate strain of the specimen is also increased with the decrease of the elastic modulus value of the reinforcement.

关键词： 3D, Numerical test reinforcement concrete Crack distribution

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Journal of Shanghai Jiaotong university(Science) 2008年第2期13卷 139-144页

作者：尚春雨赵金城 department of civil {2. Shanghai Jiaotong University

A novel tuned liquid damper (TLD) rectangular tank with two angle-adjustable baffles was pre- *** numerical analysis was performed using the commercial code *** standard kinetic energy and dissipation rate turbulent model was employed,which was solved using volume of fluid (VOF) method able to treat both the free surface motion and the viscous stresses over the rigid walls *** relationship between the natural periods of water and the angles of its baffles was studied by numerical sim- ulating of a case,and the changes of energy dissipations were *** natural periods and dampers of the novel TLD can be changed in a wide range by adjusting the baffles' angle,thus it is more effective in controlling the vibration of structures in a wide frequency range.

关键词： tuned liquid damper angle-adjustable baffle turbulent eddies energy dissipation

Some Consideration on Elastic pile Foundation Analysis by poulos

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岩石力学与工程学报 2001年第6期20卷 882-885页

作者： cheng Yungming (department of {2. and Structural engineering, The Hong Kong polytechnic university, Hong Kong, china) 香港工业大学香港

The elastic pile foundation analysis by poulos is well developed and has been adopted by some countries in their design guideline. In die vertical load analysis, the author has discovered that the approach by poulos is sensitive to the number of segments used fix-analysis and can lead to some unreasonable results for pile in finite depth of soil. In the lateral load analysis, the group interaction factor which is claimed to be a linear relation of the departure angle β by poulos is found to be a linear relation of sin2.β by the author.

关键词： pile elastic analysis vertical and horizontal load

Effect of specimen thickness on Mode Ⅱ fracture toughness of rock

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Journal of Central South university of technology 2001年第2期8卷 114-119页

作者： rAO Qiu hua 1,SUN Zong qi 1,WANG Gui yao 2.XU Ji cheng 3,ZHANG Jing yi 3 (1.College of resources, Environment and civil {2., Central South university, Changsha 410083, china 2.river and Sea department, Changsha Communications Univer College of resources Environment and Civil Engineering Central South University Changsha China river and Sea department Changsha Communications University Changsha China Open Lab of Mechanics Central South University Changsha China

Anti symmetric four point bending specimens with different thickness, without and with guiding grooves, were used to conduct Mode Ⅱ fracture test and study the effect of specimen thickness on Mode Ⅱ fracture toughness of rock. Numerical calculations show that the occurrence of Mode Ⅱ fracture in the specimens without guiding grooves (when the inner and outer loading points are moved close to the notch plane) and with guiding grooves is attributed to a favorable stress condition created for Mode Ⅱ fracture, i.e. tensile stress at the notch tip is depressed to be lower than the tensile strength or to be compressive stress, and the ratio of shear stress to tensile stress at notch tip is very high. The measured value of Mode Ⅱ fracture toughness K ⅡC decreases with the increase of the specimen thickness or the net thickness of specimen. This is because a thick specimen promotes a plane strain state and thus results in a relatively small fracture toughness.

关键词： Mode Ⅱ fracture toughness rock fracture stress analysis specimen thickness

Stability of radial Basis Collocation Method for Transient Dynamics

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Journal of Shanghai Jiaotong university(Science) 2010年第5期15卷 615-621页

作者：罗汉中陈俊贤胡馨云黄醒春 School of Naval Architecture Ocean and Civil EngineeringShanghai Jiaotong University civil and Environmental engineering {2. University of CaliforniaLos Angeles (UCLA)los Angeles 90024United States Mathematics department Tunghai University

Strong form collocation with radial basis approximation is introduced for the numerical solution of transient *** Neumann stability analysis of this radial basis collocation method is performed to obtain the stability conditions for second order wave equation with central difference temporal *** shape parameter of the radial basis functions not only has strong influence on the spatial stability and accuracy,but also has profound influence on the temporal *** studies are conducted and show reasonable agreement with stability *** of selecting shape parameters as well as spatial discretization for solution stability are also presented.

关键词： radial basis collocation method (rBCM) stability analysis von Neumann method