Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 125

年份

2023 2

2022 6

2021 3

2020 10

2019 6

2018 3

2017 10

2016 2

2015 5

2014 3

2013 5

2012 7

2011 4

2010 13

2009 14

2008 7

2007 13

2006 2

2005 1

2003 2

展开︾

关键词

悬索桥 5

大跨度桥梁 3

斜拉桥 3

三塔悬索桥 2

关键技术 2

南京长江第四大桥 2

发展 2

大规格 2

大跨桥梁 2

抖振 2

泰州大桥 2

1860 MPa等级 1

32 m箱梁 1

4250 m 1

4Pi-SMLM 1

4Pi超分辨显微术 1

700 m跨径级别 1

CFD 1

HSLC钢 1

展开︾

检索范围：

排序：展示方式：

Structural design and mechanical responses of closely spaced super-span double tunnels in strongly weathered

Jiaxin HE; Shaohui HE; Xiabing LIU; Jinlei ZHENG

《结构与土木工程前沿（英文）》 2022年第16卷第6期页码 685-703 doi: 10.1007/s11709-022-0824-2

摘要： This paper presents a study of closely spaced double tunnels in Taizhou, China. One is Xiabei Mountain No. 2 four-line super-span high-speed railway tunnel (HRT), and the other is Xiabei Mountain double-line large-span subway tunnel (ST). The excavation spans of HRT and ST are 26.3 and 14 m, respectively. The two tunnels are located at different levels, and their separating distance is 17.2 m. Due to the short construction period, the HRT excavation was completed earlier than ST. The structural design of the HRT, taking account of the disturbance by the ST construction, was analyzed by a numerical simulation. It was found that the “yielding principle” design was more feasible than the “resistance principle” design when considering the safety and durability of the HRT secondary lining. The mechanical responses of the HRT during ST construction were comprehensively monitored and analyzed, including the vault settlement, horizontal convergence, surrounding rock pressure, and the internal stress in shotcrete and steel arch. Results show that the longitudinal influence range of the ST construction on the HRT was approximately 0.6–1.1 times the ST outer diameter; the disturbance was mainly generated in the ST upper bench excavation; and the final axial force of the HRT shotcrete was approximately 9–16 times that of the steel arch, which indicated that the shotcrete was the main bearing structure. The safety status of the HRT was assessed based on the monitoring data, and the minimum safety factors of the HRT shotcrete and steel arch were 1.61 and 1.89, respectively. Parametric studies were performed to show how the lining stress of HRT was affected by the relative angle, pillar width, ST excavation method and excavation footage. Finally, the design and construction optimization were proposed according to the monitoring data and parameter analysis results. This study might provide practical reference for similar projects.

关键词： double tunnels super-span structural design mechanical response numerical simulation field monitoring

HTML PDF 收藏

特大跨度斜拉桥施工几何控制原理的数值验证

黄灿,卜一之,张清华

《中国工程科学》 2009年第11卷第1期页码 87-91

摘要：

以苏通长江大桥为研究对象，通过数值仿真分析验证了几何控制原理的正确性。通过对施工过程中临时荷载和环境温度对于结构线形影响的系统分析和研究结果表明，在考虑施工全过程几何非线性影响的条件下，临时荷载及环境温度等因素仅影响施工过程中的结构状态，基本不影响成桥的结构线形和内力状态，几何控制原理适用于超大斜拉桥施工控制，采用几何控制原理能够获得良好的施工控制结果。

关键词：斜拉桥几何控制几何非线性数值验证

HTML PDF 收藏

Design and construction of super-long span bridges in China: Review and future perspectives

《结构与土木工程前沿（英文）》 2020年第14卷第4期页码 803-838 doi: 10.1007/s11709-020-0644-1

摘要： Super-long span bridges demand high design requirements and involve many difficulties when constructed, which is an important indicator to reflect the bridge technical level of a country. Over the past three decades, a large percentage of the new long-span bridges around the world were built in China, and thus, abundant technological innovations and experience have been accumulated during the design and construction. This paper aims to review and summarize the design and construction practices of the superstructure, the substructure, and the steel deck paving of the long-span bridges during the past decades as well as the current operation status of the existing long-span bridges in China. A future perspective was given on the developing trend of high-speed railway bridge, bridge over deep-sea, health monitoring and maintenance, intellectualization, standard system, and information technology, which is expected to guide the development direction for the construction of future super long-span bridges and promote China to become a strong bridge construction country.

关键词： long-span bridges steel box girder design technology construction technology review and future perspectives

HTML PDF 收藏

超大跨度斜拉桥空气静力和动力稳定性研究

张新军,孙海凌

《中国工程科学》 2014年第16卷第3期页码 50-58

摘要：

随着斜拉桥跨度的持续增长，结构更趋于轻柔，风作用下的结构稳定性已成为超千米主跨斜拉桥设计和研究的重要问题。采用大跨度桥梁三维非线性空气静力和动力稳定性分析方法，对1400m主跨的超大跨度斜拉桥进行了空气静力和动力稳定性分析，并与同等主跨的悬索桥进行对比，从抗风性能角度探讨了斜拉桥在超千米主跨桥梁中的适用性。在此基础上，分别就主梁的高度和宽度、桥塔结构型式、桥塔高跨比、边主跨比、辅助墩设置、斜拉索锚固方式等结构设计参数对超大跨度斜拉桥空气静力和动力稳定性的影响进行了分析，指出了关键的设计参数及其合理取值。结果表明：与同等主跨的悬索桥相比，斜拉桥的结构刚度更大，空气静力和动力稳定性更好，适宜采用于超千米主跨的大跨度桥梁；超大跨度斜拉桥在增大主梁高度、减小梁宽、采用倒Y形桥塔并增大塔高、减小边跨长度、边跨设置辅助墩以及部分斜拉索地锚等情况下，都可以获得比较好的空气静力和动力稳定性。

关键词：超大跨度斜拉桥空气静力稳定性空气动力稳定性设计参数

HTML PDF 收藏

Aerodynamic stability evolution tendency of suspension bridges with spans from 1000 to 5000 m

《结构与土木工程前沿（英文）》 doi: 10.1007/s11709-023-0980-z

摘要： Aerodynamic instability owing to aerostatic and flutter-related failures is a significant concern in the wind-resistant design of long-span suspension bridges. Based on the dynamic characteristics of suspension bridges with spans ranging from 888 to 1991 m, we proposed fitted equations for increasing spans and base frequencies. Finite element models of suspension bridges with increasing span from 1000 to 5000 m were constructed. The structural parameters were optimized to follow the fitted tendencies. To analyze the aerodynamic instability, streamlined single-box section (SBS), lattice truss section (LTS), narrow slotted section (NSS), and wide slotted section (WSS) were considered. We performed three-dimensional (3-D) full-mode flutter analysis and nonlinear aerostatic instability analysis. The flutter critical wind speed continuously decreases with span growth, showing an unlimited approaching phenomenon. Regarding aerostatic instability, the instability wind speed decreases with span to approximately 3000 m, and increases when the span is in the range of 3000 to 5000 m. Minimum aerostatic instability wind speed with SBS or LTS girder would be lower than observed maximal gust wind speed, indicating the probability of aerostatic instability. This study proposes that suspension bridge with span approximately 3000 m should be focused on both aerostatic instability and flutter, and more aerodynamic configuration optimistic optimizations for flutter are essential for super long-span suspension bridges with spans longer than 3000 m.

关键词： suspension bridge super long-span finite element model aerodynamic instability aerodynamic configuration

HTML PDF 收藏

Green Construction of National Speed Skating Oval

《工程管理前沿（英文）》 2022年第9卷第1期页码 170-176 doi: 10.1007/s42524-021-0177-x

关键词： super large-span cable net structure CO₂ Transcritical Direct-cooling Ice Making System dynamic high-precision construction measurement green construction National Speed Skating Oval

HTML PDF 收藏

超长大规格高强悬索桥主缆单元索股制造技术研究

张海良,沈旺,李刚,郭健

《中国工程科学》 2010年第12卷第7期页码 8-12

摘要：

以西堠门大桥国产1 770 MPa主缆索股制作技术为基础，进一步研究超长（≥4 250 m）大规格（≥169丝）高强度（1 860 MPa等级）主缆单元索股制造技术，同时对主缆索股的水平收放索技术和装置进行进一步的研究，为特大跨径悬索桥主缆单元索股的制造提供技术研究基础。

关键词：特大跨径大规格 1860 MPa等级 4250 m 疲劳试验放索试验

HTML PDF 收藏

CFRP拉索预应力超高性能混凝土斜拉桥力学性能分析

方志,任亮,凡凤红

《中国工程科学》 2012年第14卷第7期页码 53-59

摘要：

为了探讨碳纤维复合材料 (carbon fiber reinforced polymer, CFRP) 和超高性能活性粉末混凝土(reactive powder concrete, RPC)在超大跨度斜拉桥中应用的可行性，以主跨1 008 m的大跨度钢主梁斜拉桥设计方案为例，采用拉索的等强度原则将原桥钢索替换成CFRP索，考虑截面刚度、截面应力和局部稳定等要求，将原桥钢主梁替换成RPC主梁，拟订了一座等跨度的CFRP拉索、RPC主梁斜拉桥方案。采用有限元法分别对两种方案结构的静力特性、动力特性、稳定性能以及抗风性能等进行了分析与比较。结果表明：从结构受力性能角度而言，采用超高性能混凝土主梁和CFRP拉索构成千米级跨度混凝土斜拉桥的结构体系是可行的。

关键词：斜拉桥碳纤维(CFRP) 活性粉末混凝土力学性能

HTML PDF 收藏

Breeding strategies for increasing yield potential in super hybrid rice

Shihua CHENG,Xiaodeng ZHAN,Liyong CAO

《农业科学与工程前沿（英文）》 2015年第2卷第4期页码 277-282 doi: 10.15302/J-FASE-2015081

摘要： Super hybrid rice breeding is a new breeding method combining semi-dwarf breeding and heterosis breeding using germplasm and gene-environment interactions. This paper reviews the breeding strategies of super hybrid rice breeding in China, focusing on the utilization of heterosis of indica and japonica subspecies, construction of ideal plant architecture and pyramiding of disease resistant genes in restorer lines. To develop super hybrid rice, considerable effort should be made to explore genes related with high yield, good quality, resistance to pests and diseases, tolerance to stresses. Molecular breeding methods in combination with crossing techniques should be adopted in super hybrid rice breeding.

关键词： super hybrid rice breeding strategies yield potential

HTML PDF 收藏

Control mode selection for modal control of long-span arch bridge

Zhengying LI, Zhengliang LI,

《结构与土木工程前沿（英文）》 2009年第3卷第4期页码 401-406 doi: 10.1007/s11709-009-0052-z

摘要： For seismic control of arch bridge, a model reduction of long-span arch bridge was implemented based on modal analysis. As for the critical mode selection, an approach based on the maximum modal displacement was presented. This approach takes into consideration the effect of external seismic excitation and is more reasonable than only considering dynamic bridge characteristics based on a modal contribution ratio. The time domain and frequency domain analysis method were used to verify the simplified model of the Nimu arch bridge in Tibet as an example. The numerical results show that the method of maximal modal displacement better analyze long-span arch bridge when multisupport seismic excitation must be considered. The reduced-order system also is more in line with the performance of the original model.

关键词： selection reduced-order excitation long-span simplified

HTML PDF 收藏

Tool wear mechanisms in the machining of Nickel based super-alloys: A review

Waseem AKHTAR,Jianfei SUN,Pengfei SUN,Wuyi CHEN,Zawar SALEEM

《机械工程前沿（英文）》 2014年第9卷第2期页码 106-119 doi: 10.1007/s11465-014-0301-2

摘要：

Nickel based super-alloys are widely employed in aircraft engines and gas turbines due to their high temperature strength, corrosion resistance and, excellent thermal fatigue properties. Conversely, these alloys are very difficult to machine and cause rapid wear of the cutting tool, frequent tool changes are thus required resulting in low economy of the machining process. This study provides a detailed review of the tool wear mechanism in the machining of nickel based super-alloys. Typical tool wear mechanisms found by different researchers are analyzed in order to find out the most prevalent wear mechanism affecting the tool life. The review of existing works has revealed interesting findings about the tool wear mechanisms in the machining of these alloys. Adhesion wear is found to be the main phenomenon leading to the cutting tool wear in this study.

关键词： tool wear nickel based super-alloy wear mechanism

HTML PDF 收藏

Sulige Gas Field super project

Wenrui HU, Jingwei BAO, Pengcheng JI

《工程管理前沿（英文）》 2017年第4卷第3期页码 379-384 doi: 10.15302/J-FEM-2017107

HTML PDF 收藏

State-of-the-art of long-span bridge engineering in China

XIANG Haifan, GE Yaojun

《结构与土木工程前沿（英文）》 2007年第1卷第4期页码 379-388 doi: 10.1007/s11709-007-0051-x

摘要： This paper introduces the state-of-the-art of longspan bridge engineering in China with emphases on recent long-span bridge projects, bridge deck configuration and material, design codes of long-span bridges and improvement of aero

关键词： bridge engineering state-of-the-art long-span bridge configuration improvement

HTML PDF 收藏

综采大跨度回采巷道锚杆—锚索减跨支护技术研究

朱永建,罗一新,张道兵

《中国工程科学》 2010年第12卷第3期页码 51-55

摘要：

针对综采大跨度回采巷道顶板难以控制的现场实际，在分析了单层岩层稳定性的主要影响因素基础上，运用UDEC3.0数值模拟软件深入研究了由单层岩层组合而成的回采巷道顶板稳定性的影响因素及其变形破坏规律。提出了通过合理布置锚索的位置，达到锚杆—锚索协同支护的减跨作用，在此基础上发挥锚杆的组合梁（拱）及悬吊作用以控制大跨度回采巷道冒顶事故的新的支护思想，并将其应用于神东矿区补连塔煤矿大跨度回采巷道，取得了良好的现场应用效果。

关键词：大跨度回采巷道顶板锚杆—锚索减跨支护

HTML PDF 收藏

Innovative steel-UHPC composite bridge girders for long-span bridges

Xudong SHAO, Lu DENG, Junhui CAO

《结构与土木工程前沿（英文）》 2019年第13卷第4期页码 981-989 doi: 10.1007/s11709-019-0531-9

摘要： Steel and steel-concrete composite girders are two types of girders commonly used for long-span bridges. However, practice has shown that the two types of girders have some drawbacks. For steel girders, the orthotropic steel deck (OSD) is vulnerable to fatigue cracking and the asphalt overlay is susceptible to damage such as rutting and pot holes. While for steel-concrete composite girders, the concrete deck is generally thick and heavy, and the deck is prone to cracking because of its low tensile strength and high creep. Thus, to improve the serviceability and durability of girders for long-span bridges, three new types of steel-UHPC lightweight composite bridge girders are proposed, where UHPC denotes ultra-high performance concrete. The first two types consist of an OSD and a thin UHPC layer while the third type consists of a steel beam and a UHPC waffle deck. Due to excellent mechanical behaviors and impressive durability of UHPC, the steel-UHPC composite girders have the advantages of light weight, high strength, low creep coefficient, low risk of cracking, and excellent durability, making them competitive alternatives for long-span bridges. To date, the proposed steel-UHPC composite girders have been applied to 14 real bridges in China. It is expected that the application of the new steel-UHPC composite girders on long-span bridges will have a promising future.

关键词： steel-UHPC composite bridge girder long-span bridge orthotropic steel deck fatigue cracking durability