Results 21 to 30 of about 2,792 (156)
工程科学与技术研究, 2023 为了研究既有下穿式箱涵顶出过程中箱涵自身及土体应力变化规律，本文采用ABAQUS有限元软件建立依托工程箱涵与土体的三维模型并进行了数值分析研究。根据实际施工中箱涵与两侧路基的减阻情况，模拟了0m、2m、4m减阻高度的三种箱涵顶出工况。研究结果表明，三种工况的顶推力-位移曲线均可以分成两个阶段，在第一阶段末尾静摩擦力转为滑动摩擦力的一瞬间，顶推力到达最大值；顶出过程中箱涵底部的应力随减阻高度的增大而减小；减阻高度的增大可以降低箱涵侧面的土压力，有效减小路基在顶推过程中的变形。
省华 金 +3 more
semanticscholar +1 more source
Jianzhu Gangjiegou Jinzhan, 2020 在钢结构桥梁的施工设计中,钢梁安装受诸多因素的影响,为确保成桥阶段钢梁性能的充分发挥,对钢梁安装施工进行分析有其意义所在。以阜阳颖柳路泉河桥项目为背景,研究钢箱梁分块方案选择及其在滑道梁拖拉施工工序中的应力表现。通过采用ABAQUS中壳单元模拟板件、桁架单元模拟临时支撑,建立有限元模型,计算分析钢箱梁分块吊装及拖拉施工过程中的各项性能,以求验证该安装方案在实际施工过程中的安全性与可行性。
陈杰, 陈方尧, 张欢, 姜旭
doaj
Experimental study on attitude control of shield machine in soft and hard uneven strata [PDF]
A soft and hard uneven stratum is one of the wenk geological conditions which often encountered in the process of shield construction. When the shield machine excavate a soft and hard uneven stratum, the uneven force of the cutterhead can easily lead to ...
HUANG Dawei1, 2 , CHEN Kai1, 2, XU Changjie1, 2 , LU Wenjian1, 2, ZENG Xiaotao1, 2
core +1 more source
Sexuality, Gender &Policy, Volume 8, Issue 4, November 2025.ABSTRACT For over 30 years, the northern Mexican state of Chihuahua bordering Texas and New Mexico has experienced and witnessed multiple forms of violence across its rural and urban regions. Communities are besieged with cartel and gender‐based violence and the saturation of international corporations that pay less than livable wages for workers in ...
Sylvia Fernández Quintanilla +1 more
wiley +1 more source
, 2019 BIM 技术是集成各种相关信息的工程数据模型，其优势主要包括快速建模、施工模拟、施工进度管理及资源管理等。论文以实际工程为例，将BIM 技术应用到钢结构桥梁的加工制造过程，旨在通过BIM 技术直观可靠、降本增效的作用提升项目的信息化管理水平，并为同类工程的施工提供参考。
兴阔 王, 化劼 王, 宾 白
core +1 more source
Landscape‐scale predictions of future grassland conversion to cropland or development
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Grassland conservation planning often focuses on high‐risk landscapes, but many grassland conversion models are not designed to optimize conservation planning because they lack multidimensional risk assessments and are misaligned with ecological and conservation delivery scales.
Kevin W. Barnes +2 more
wiley +1 more source
, 2018 <p align="left">建筑信息模型在国内建筑施工企业应用刚刚起步，缺乏相关参考经验。本文以某建体育馆项目为例，运用鲁班BIM系列软件，对工程进行了三维模型创建、图纸会审、碰撞检查、三维可视化交底、施工模拟、数字化现场管理方面的BIM应用，有效的提高了施工效率，减少了返工、浪费，为工程如期投入使用提供了有力保障。</p>
刘 彬
core +1 more source
Methods in Ecology and Evolution, Volume 15, Issue 11, Page 1926-1939, November 2024.Abstract Simulation studies are essential tools to assess statistical methods. Functioning as controlled experiments, simulations generate data from known underlying processes. However, unclear or incomplete reporting of simulation studies can impact their interpretability and reproducibility, potentially leading to the misuse of statistical methods ...
Coralie Williams +6 more
wiley +1 more source
工程技术与管理, 2020 随着中国建筑行业的快速发展，为适应建筑行业对人才的需求，各大院校都单独设立了建筑工程施工技术专业。为了帮助学生更直观地掌握建筑工程施工技术，很多高校纷纷引进 BIM 虚拟仿真技术，通过仿真模拟建筑施工现场环境，让学生更加扎实的把握技术要领。论文结合 BIM 虚拟仿真技术的相关理论知识，对其在建筑工程施工技术教学中的实践情况进行了分析。
应祺 肖
semanticscholar +1 more source
Jianzhu Gangjiegou Jinzhan, 2020 白浪河无轴式摩天轮采用创新的固定立体环状结构形式,其施工过程中风荷载和温度作用影响显著。为保障结构的施工安全和安装精度,采用非线性分步建模技术对结构施工全过程进行模拟分析;基于模拟结果确定了结构合拢温度和变形预调值,并对结构施工过程和加载过程关键杆件进行监测。结果表明:施工过程中温度作用所引起的结构应力可达60MPa,在分析时应考虑构件安装温度的影响;采用正装迭代法确定结构变形预调值可有效控制结构的最终位形,合理选择合拢温度可降低竣工后结构的应力水平,最大应力降幅达40MPa ...
刘哲, 严加宝, 史奉伟
doaj