为解决传统剪力墙自重大,延性差等问题,本文提出了一种将剪力墙受力较小的中间部分开洞、并加人字支撑的新型“装配式轻质人字支撑抗震墙”,进而研究其抗震性能。以传统剪力墙的水平低周反复试验为基础,采用开发有限元软件OpenSees,对...为解决传统剪力墙自重大,延性差等问题,本文提出了一种将剪力墙受力较小的中间部分开洞、并加人字支撑的新型“装配式轻质人字支撑抗震墙”,进而研究其抗震性能。以传统剪力墙的水平低周反复试验为基础,采用开发有限元软件OpenSees,对其进行数值模拟分析,和试验结果比较吻合良好,验证了本文采用的数值分析方法的合理性。设计装配式轻质人字支撑抗震墙BJZC、采用OpenSees进行数值模拟研究其抗震性能,结果表明:装配式轻质人字支撑抗震墙BJZC的抗震性能满足设计要求,但自重明显减轻;且由于支撑的作用,可形成具有多道抗震防线的结构。In order to solve the problem of the traditional shear wall, such as the major weight and poor ductility, a new “assembled shear wall with lightweight herringbone brace” was designed, and the seismic performances were studied. Based on the horizontal low cycle loading test for the traditional shear wall, the OpenSees was used to analyze the seismic performance of the shear wall. The analysis results fit well with the test results, which show that the numerical analysis method is reasonable in this paper. Furthermore, the assembled shear wall with lightweight herringbone brace BJZC was designed, and the seismic performance of which was analyzed by using OpenSees. The results show that the seismic performance of assembled shear wall with lightweight herringbone brace can meet design requirement. Compared to the traditional shear wall, the mass of the new-type wall is lighter. And because of the brace function, it can form a structural system with multi-channel seismic defenses.展开更多
为探究冲击荷载和爆炸荷载作用下隧道变形行为特征,提出了一种模型试验与数值模拟相结合的方法来分析不同动态荷载条件下隧道的损伤行为和模式。以海螺沟隧道为研究对象,采用模型试验和数值模拟相结合的方式,首先对缩尺物理隧道模型进...为探究冲击荷载和爆炸荷载作用下隧道变形行为特征,提出了一种模型试验与数值模拟相结合的方法来分析不同动态荷载条件下隧道的损伤行为和模式。以海螺沟隧道为研究对象,采用模型试验和数值模拟相结合的方式,首先对缩尺物理隧道模型进行冲击测试,接着对隧道模型进行数值分析并完成验证,然后对比了小比例隧道模型和原型模型在冲击荷载下的隧道变形结果,最后分析了爆破荷载对原型隧道变形的影响。研究结果表明:本研究提出方法能够真实反映实际冲击荷载对隧道变形的影响;缩尺隧道模型的数值分析结果与试验结果较为吻合;在冲击荷载作用下,原型隧道顶部的约为缩尺物理模型的10倍;原型隧道数值模型在冲击荷载作用下顶部变形量与500 kg TNT爆破荷载造成的变形较为一致,利用冲击荷载可有效模拟爆破载荷对隧道拱顶的损伤情况;增大覆盖深度和减小冲击荷载是避免隧道造成重大损伤的有效举措。本研究的成果克服了地表爆破时现场测试的困难,为分析隧道在不同动态荷载作用下的破坏行为和模式提供一种低成本、安全可靠的测试方法,为优化爆破荷载的隧道安全、经济的设计提供技术支撑。展开更多
管材质量、腐蚀老化等易引起管道破损渗漏,造成土壤颗粒流失,进而产生地下空洞,逐渐导致城市地面塌陷发生危险事故。针对无压管线破损导致的颗粒流失问题,该文利用Hertz-Mindlin with JKR Cohesion接触模型对具有一定含水率的黏重黑土...管材质量、腐蚀老化等易引起管道破损渗漏,造成土壤颗粒流失,进而产生地下空洞,逐渐导致城市地面塌陷发生危险事故。针对无压管线破损导致的颗粒流失问题,该文利用Hertz-Mindlin with JKR Cohesion接触模型对具有一定含水率的黏重黑土开展数值分析。通过对比不同含水率土体、管道破碎口及管道埋深的颗粒流失和总法向力变化,重点研究初期水土流失带来的土壤松动情况。展开更多
混合式教学是指把学生作为教学活动的主体,将教学活动分解为不同的模块,为每一个模块制定教学目标,在教学活动中采用多种现代化教学手段以及恰当的教学方法,完成对学习者学习活动的引导和学习效果评价的教学模式。本文通过探索数值分析...混合式教学是指把学生作为教学活动的主体,将教学活动分解为不同的模块,为每一个模块制定教学目标,在教学活动中采用多种现代化教学手段以及恰当的教学方法,完成对学习者学习活动的引导和学习效果评价的教学模式。本文通过探索数值分析混合式教学的设计与实践,发挥线下课堂和线上课堂的教学优点,优化课堂教学活动,增强学生学习的主动性和积极性,同时提高学习效率,从而逐步提升数值分析的课堂教学效果。Hybrid teaching refers to a teaching model that takes students as the main body of teaching activities, decomposes teaching activities into different modules, sets teaching objectives for each module, uses various modern teaching methods and appropriate teaching methods in teaching activities, and guides learners’ learning activities and evaluates their learning effectiveness. This paper explores the design and practice of hybrid teaching for numerical analysis, leveraging the advantages of both offline and online classrooms, optimizing classroom teaching activities, enhancing students’ initiative and enthusiasm for learning, and improving learning efficiency, thereby gradually improving the effectiveness of numerical analysis classroom teaching.展开更多
文摘为解决传统剪力墙自重大,延性差等问题,本文提出了一种将剪力墙受力较小的中间部分开洞、并加人字支撑的新型“装配式轻质人字支撑抗震墙”,进而研究其抗震性能。以传统剪力墙的水平低周反复试验为基础,采用开发有限元软件OpenSees,对其进行数值模拟分析,和试验结果比较吻合良好,验证了本文采用的数值分析方法的合理性。设计装配式轻质人字支撑抗震墙BJZC、采用OpenSees进行数值模拟研究其抗震性能,结果表明:装配式轻质人字支撑抗震墙BJZC的抗震性能满足设计要求,但自重明显减轻;且由于支撑的作用,可形成具有多道抗震防线的结构。In order to solve the problem of the traditional shear wall, such as the major weight and poor ductility, a new “assembled shear wall with lightweight herringbone brace” was designed, and the seismic performances were studied. Based on the horizontal low cycle loading test for the traditional shear wall, the OpenSees was used to analyze the seismic performance of the shear wall. The analysis results fit well with the test results, which show that the numerical analysis method is reasonable in this paper. Furthermore, the assembled shear wall with lightweight herringbone brace BJZC was designed, and the seismic performance of which was analyzed by using OpenSees. The results show that the seismic performance of assembled shear wall with lightweight herringbone brace can meet design requirement. Compared to the traditional shear wall, the mass of the new-type wall is lighter. And because of the brace function, it can form a structural system with multi-channel seismic defenses.
文摘为探究冲击荷载和爆炸荷载作用下隧道变形行为特征,提出了一种模型试验与数值模拟相结合的方法来分析不同动态荷载条件下隧道的损伤行为和模式。以海螺沟隧道为研究对象,采用模型试验和数值模拟相结合的方式,首先对缩尺物理隧道模型进行冲击测试,接着对隧道模型进行数值分析并完成验证,然后对比了小比例隧道模型和原型模型在冲击荷载下的隧道变形结果,最后分析了爆破荷载对原型隧道变形的影响。研究结果表明:本研究提出方法能够真实反映实际冲击荷载对隧道变形的影响;缩尺隧道模型的数值分析结果与试验结果较为吻合;在冲击荷载作用下,原型隧道顶部的约为缩尺物理模型的10倍;原型隧道数值模型在冲击荷载作用下顶部变形量与500 kg TNT爆破荷载造成的变形较为一致,利用冲击荷载可有效模拟爆破载荷对隧道拱顶的损伤情况;增大覆盖深度和减小冲击荷载是避免隧道造成重大损伤的有效举措。本研究的成果克服了地表爆破时现场测试的困难,为分析隧道在不同动态荷载作用下的破坏行为和模式提供一种低成本、安全可靠的测试方法,为优化爆破荷载的隧道安全、经济的设计提供技术支撑。
文摘管材质量、腐蚀老化等易引起管道破损渗漏,造成土壤颗粒流失,进而产生地下空洞,逐渐导致城市地面塌陷发生危险事故。针对无压管线破损导致的颗粒流失问题,该文利用Hertz-Mindlin with JKR Cohesion接触模型对具有一定含水率的黏重黑土开展数值分析。通过对比不同含水率土体、管道破碎口及管道埋深的颗粒流失和总法向力变化,重点研究初期水土流失带来的土壤松动情况。
文摘混合式教学是指把学生作为教学活动的主体,将教学活动分解为不同的模块,为每一个模块制定教学目标,在教学活动中采用多种现代化教学手段以及恰当的教学方法,完成对学习者学习活动的引导和学习效果评价的教学模式。本文通过探索数值分析混合式教学的设计与实践,发挥线下课堂和线上课堂的教学优点,优化课堂教学活动,增强学生学习的主动性和积极性,同时提高学习效率,从而逐步提升数值分析的课堂教学效果。Hybrid teaching refers to a teaching model that takes students as the main body of teaching activities, decomposes teaching activities into different modules, sets teaching objectives for each module, uses various modern teaching methods and appropriate teaching methods in teaching activities, and guides learners’ learning activities and evaluates their learning effectiveness. This paper explores the design and practice of hybrid teaching for numerical analysis, leveraging the advantages of both offline and online classrooms, optimizing classroom teaching activities, enhancing students’ initiative and enthusiasm for learning, and improving learning efficiency, thereby gradually improving the effectiveness of numerical analysis classroom teaching.
