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Pretest analysis of shake table response of a two-span steel girder bridge incorporating acceleratedbridge construction connections

Elmira SHOUSHTARI, M. Saiid SAIIDI, Ahmad ITANI, Mohamed A. MOUSTAFA

《结构与土木工程前沿（英文）》 2020年第14卷第1期页码 169-184 doi: 10.1007/s11709-019-0590-y

摘要： This paper presents pretest analysis of a shake table test model of a 0.35-scale, two-span, steel plate girder bridge. The objective of pretest analysis was to obtain an insight on the seismic response of the bridge model during the shake table tests. The bridge included seat type abutments, full-depth precast deck panels, and a two-column bent in which columns were pinned to the footing and integral with superstructure. Six accelerated bridge construction connections were incorporated in the bridge model. An analytical model was developed in OpenSees and was subjected to ten input bi-directional earthquake motions including near-fault and far-field records. The overall seismic response of the bridge was satisfactory for all the earthquake records at 100%, 150%, and 200% design level. All connections and capacity-protected components remained elastic, and the average ductility capacity surpassed the ductility demand even at 200% design level. Using experimental fragility curves developed for RC bridge columns, it was predicted that there was a probability of 45% that columns would undergo the imminent failure in the last run and a probability of 30% for their failure.

关键词： shake table test accelerated bridge construction steel girder bridge OpenSEES UHPC simple for dead continuous for live

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Precast steel–UHPC lightweight composite bridge for accelerated bridge construction

Shuwen DENG, Xudong SHAO, Xudong ZHAO, Yang WANG, Yan WANG

《结构与土木工程前沿（英文）》 2021年第15卷第2期页码 364-377 doi: 10.1007/s11709-021-0702-3

摘要： In this study, a fully precast steel–ultrahigh performance concrete (UHPC) lightweight composite bridge (LWCB) was proposed based on Mapu Bridge, aiming at accelerating construction in bridge engineering. Cast-in-place joints are generally the controlling factor of segmental structures. Therefore, an innovative girder-to-girder joint that is suitable for LWCB was developed. A specimen consisting of two prefabricated steel–UHPC composite girder parts and one post-cast joint part was fabricated to determine if the joint can effectively transfer load between girders. The flexural behavior of the specimen under a negative bending moment was explored. Finite element analyses of Mapu Bridge showed that the nominal stress of critical sections could meet the required stress, indicating that the design is reasonable. The fatigue performance of the UHPC deck was assessed based on past research, and results revealed that the fatigue performance could meet the design requirements. Based on the test results, a crack width prediction method for the joint interface, a simplified calculation method for the design moment, and a deflection calculation method for the steel–UHPC composite girder in consideration of the UHPC tensile stiffness effect were presented. Good agreements were achieved between the predicted values and test results.

关键词： accelerated bridge construction ultrahigh-performance concrete steel–UHPC composite bridge UHPC girder-to-girder joint

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Seismic performance of precast hollow bridge piers with different construction details

Zhiqiang WANG,Jiping GE,Hongyi WEI

《结构与土木工程前沿（英文）》 2014年第8卷第4期页码 399-413 doi: 10.1007/s11709-014-0273-7

摘要： Currently the design scheme of precast hollow concrete bridge piers will be adopted in bridge design in China, but there is no code including specific design details of precast segmental piers in high seismic risk area. For comparative study of seismic performance of the hollow bridge piers which had different design details, six specimens of hollow section bridge pier were designed and tested. The specimens consist of the monolithic cast-in-place concrete bridge pier, precast segmental prestressed pier with cast-in-place joint and precast segmental concrete bridge pier with dry joints. Results show that all specimens have good displacement capacity. The bridge pier with bonded prestressed strands exhibits better energy dissipation capacity and higher strength. The un-bonded prestressed strand bridge pier displays less residual plastic displacement and energy dissipation capacity. The bridge pier with both bonded prestressed strands at the edge of the section and un-bonded in the center of the section not only exhibits more ductility capacity and less residual plastic displacement, but also shows better energy dissipation capacity. Compared with experimental results of prestressed bridge columns, analytical result demonstrates the developed numerical analysis model would provide the reasonable and accurate results.

关键词： hollow pier seismic performance cyclic load precast concrete bridge columns

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三塔两跨悬索桥猫道设计与施工

周畅,杜洪池

《中国工程科学》 2010年第12卷第4期页码 63-67

摘要：

泰州大桥为国内外首座千米级三塔两跨悬索桥，中塔首次采用全钢结构，工程实践经验少，猫道系统作为悬索桥上部结构安装工程最为重要的临时施工设施，其设计和施工尤为重要。在分析三塔两跨悬索桥猫道设计与施工中存在的关键问题的基础上，泰州大桥猫道设计选择了不设抗风缆的四跨连续构造。叙述猫道结构的总体设计以及猫道承重索及扶手索、锚固系统、猫道面层、横向通道等细部设计，并分别描述了猫道牵引系统施工、承重索施工、面层系统施工等猫道施工工序，为今后三塔连跨悬索桥猫道设计与施工提供有力的参考依据。

关键词：悬索桥猫道施工

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Particle swarm optimization model to predict scour depth around a bridge pier

Shahaboddin SHAMSHIRBAND, Amir MOSAVI, Timon RABCZUK

《结构与土木工程前沿（英文）》 2020年第14卷第4期页码 855-866 doi: 10.1007/s11709-020-0619-2

摘要： Scour depth around bridge piers plays a vital role in the safety and stability of the bridges. The former approaches used in the prediction of scour depth are based on regression models or black box models in which the first one lacks enough accuracy while the later one does not provide a clear mathematical expression to easily employ it for other situations or cases. Therefore, this paper aims to develop new equations using particle swarm optimization as a metaheuristic approach to predict scour depth around bridge piers. To improve the efficiency of the proposed model, individual equations are derived for laboratory and field data. Moreover, sensitivity analysis is conducted to achieve the most effective parameters in the estimation of scour depth for both experimental and filed data sets. Comparing the results of the proposed model with those of existing regression-based equations reveal the superiority of the proposed method in terms of accuracy and uncertainty. Moreover, the ratio of pier width to flow depth and ratio of 50 (mean particle diameter) to flow depth for the laboratory and field data were recognized as the most effective parameters, respectively. The derived equations can be used as a suitable proxy to estimate scour depth in both experimental and prototype scales.

关键词： scour depth bridge design and construction particle swarm optimization computational mechanics artificial intelligence bridge pier

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Experimental monitoring of the strengthening construction of a segmental box girder bridge and field

Ali Fadhil NASER, Zonglin WANG

《结构与土木工程前沿（英文）》 2012年第6卷第3期页码 308-320 doi: 10.1007/s11709-012-0140-3

摘要： Prestressed concrete segmental box girder bridges are composed of short concrete segments that are either precast or cast in situ and then joined together by longitudinally post-tensioning internal, external, or mixed tendons. The objectives of this study are to monitor the construction process of the external prestressing tendons to strengthen the bridge structure and perform a field load test to measure the strain and the deflection of the anchorage devices of the external prestressing tendons to determine the state of these devices after tension forces are applied. The monitoring process of the external prestressing tendons construction includes inspecting the cracks in the diaphragm anchorage and the deviation block devices before the tension forces are applied to the external tendons; measuring the deformation of the steel deviation cross beam during the tension process; measuring the deformation of the box girder after different levels of tension forces are applied; measuring the elongation of the external tendons in each level of the tension; and measuring the natural frequency of the external tendons after the tension process is complete. The results of the monitoring process show that the measured values of the deformation, the elongation, and the natural frequency meet the requirements. Therefore, there is no damage during the construction and the tensioning of the external prestressing tendons. A field load test is performed to the anchorage beam, the steel deviation block devices, and the steel deviation cross beam. The field load test results of the anchorage devices show that the values of the strains, the stresses, and the deflection are less than the respective allowable limit values in the requirements. Therefore, the anchorage devices have sufficient strength, and the working state is good after the tension forces are applied to the external prestressing tendons.

关键词： prestressed concrete box girder monitoring external tendons strain deflection

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京沪高速铁路北京至沧州段桥梁工程施工与创新

杜嘉俊

《中国工程科学》 2009年第11卷第1期页码 22-25

摘要：

针对京沪高速铁路北京至沧州段桥梁工程特点，重点介绍了代表性特殊结构桥梁的施工方法、区域性地面沉降地区桥梁工后沉降的控制措施，以及保证350 km/h无砟轨道高平顺性的施工技术创新措施。

关键词：高速铁路桥梁施工创新

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苏通大桥300米高塔的设计与施工

罗承斌,周建林,田唯,戴捷

《中国工程科学》 2009年第11卷第3期页码 51-56

摘要：

苏通长江公路大桥索塔为世界上建成的最高桥塔。索塔锚固区采用钢混组合结构，其构造及受力机制复杂，结构耐久性问题需高度关注；300 m 塔高使得结构对风和环境因素相当敏感；高塔施工的抗风安全尤为重要。从索塔锚固区设计、索塔形态控制、抗风安全 3 个方面介绍苏通大桥索塔工程设计与施工的关键技术。

关键词：苏通大桥索塔的设计与施工

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Rational Understanding about Renaissance Path of China's Road and Bridge Engineering

Mao-run Feng,Zheng-song Zhao

《工程管理前沿（英文）》 2014年第1卷第1期页码 42-51 doi: 10.15302/J-FEM-2014013

摘要： At the turn of this century, China began the largest road and bridge development in the world, which has virtuously interacted with the social and economic development and has elevated the engineering technology to world-class level. Surveying the development of world transportation, and comparing the road and bridge construction efforts of Europe, U.S.A, Japan and China, general experiences of success can be derived as follows: It is greatly beneficial to give priority to transportation for economic development; it takes national strategy and social action to build up a transportation network; demand and innovation are the driving forces to upgrade road and bridge technology; management innovation and quality assurance can greatly improve development caliber. While rationally acknowledging China's transportation infrastructure achievements, we should reflect on issues with Chinese characteristics that have affected quality and efficiency, expose all construction practices that violate scientific law, overall management defects in road and bridge construction and maintenance, and search for new ways to strengthen social management and the creation of a healthy soft environment.

关键词： road network expressway bridge project technological innovation construction management social management

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预应力混凝土斜拉桥施工过程中的力学行为研究

张建民,肖汝诚

《中国工程科学》 2007年第9卷第5期页码 36-41

摘要：

斜拉桥施工过程中的力学行为研究是一项涉及斜拉桥质量和安全的关键技术问题。采用空间非线性有限元模拟了某大跨度预应力混凝土斜拉桥主梁的悬臂浇筑过程，引入一阶最优化计算方法来确定斜拉桥的合理施工状态，求出各施工阶段的斜拉索张拉索力和主梁的预抛高值，并讨论了物理非线性和几何非线性等因素对桥梁施工的影响，提出了减小非线性影响的措施。。

关键词：斜拉桥一阶分析法合理施工状态非线性

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苏通大桥主桥上部结构施工及控制技术研究

张鸿,罗承斌, 张永涛,游新鹏

《中国工程科学》 2009年第11卷第3期页码 85-91

摘要：

苏通大桥是目前世界上已建成的最大跨径斜拉桥，其主桥上部结构施工，主要包括边跨辅助跨以及索塔区大块梁段安装，标准梁段安装以及中跨合龙几个阶段。其中大块梁段采用浮吊整体吊装，标准梁段采用桥面双吊机系统进行吊装，中跨合龙采取顶推辅助合龙方法。同时在施工过程中采用了全过程自适应几何控制方法，通过全过程精确控制结构构件的无应力尺寸与形状，以及实现控制系统和被控制系统相适应来达到控制桥梁结构最终线形和内力的目标。为了解决长悬臂主梁风致振动条件下的测量问题，采用了包括基于GPS和基于全站仪的两种动态几何监测系统。对上部

关键词：苏通大桥上部结构施工方法施工控制几何控制抗风措施

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泰州大桥主梁施工阶段的颤振稳定性及管理对策

李承宬,陈艾荣,马如进

《中国工程科学》 2012年第14卷第5期页码 46-50

摘要：

以三塔两跨的泰州大桥为研究对象，根据有限元分析及全桥气弹模型风洞试验的结果，对主梁对称架设施工阶段的动力特性及颤振稳定性进行了研究。结合桥位地区30年的月极大风速分析，对主梁架设阶段的颤振稳定性进行了评价。最后提出了一套针对悬索桥施工阶段颤振稳定性评价及策略确定的流程，可供其他桥梁参考。

关键词：多塔悬索桥施工阶段颤振稳定性管理对策

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中国高速铁路桥梁建设关键技术

郑健

《中国工程科学》 2008年第10卷第7期页码 18-27

摘要：

桥梁设计与建造是高速铁路建设的关键。在京津城际铁路桥梁、武汉天兴洲公铁两用长江大桥、南京大胜关长江大桥等建设实践中，广泛借鉴世界高速铁路桥梁的先进技术和成功建设经验，在建设理念、技术标准、设计特点、技术运用等方面，进行深入的研究和积极的探索，并得到了充分地运用，逐步形成了具有中国特色的高速铁路桥梁建设关键技术。

关键词：高速铁路桥梁关键技术

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关于中国桥梁技术发展的思考 Review

周绪红, 张喜刚

《工程（英文）》 2019年第5卷第6期页码 1120-1130 doi: 10.1016/j.eng.2019.10.001

摘要：

在桥梁工程史上，需求一直是发展的首要驱动力。改革开放以来，在巨大的建设需求驱动下，中国桥梁完成了从“跟随者”向“竞争者”再向“引领者”的转变，在三个主要阶段实现了量和质的飞跃。中国桥梁工程迎来了新的未来。作为中国交通基础设施的重要组成部分，桥梁工程产业在新时期面临着如何支撑新型交通方式建设的挑战。本文基于对存量需求、增量需求和管理需求的基本分析，总结了中国桥梁技术的现状。我们认为，中国桥梁工程产业必须满足三大突出要求——高效建造、有效管养、长效服役。基于信息技术的智能化技术为桥梁工程创新提供了新机遇。因此，桥梁工程的发展路径亟需被改变。本文提出以发展智能化为特征的“第三代桥梁工程”的构想，同时对智能化桥梁的定位、发展重点、发展规划进行了探讨，为中国桥梁工程产业核心竞争力的提升提供了方向。

关键词：中国桥梁工程第三代桥梁工程智能桥梁科技计划施工技术管养技术信息技术

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陆上特大型沉井施工技术

邱琼海,林帆,姜江华

《中国工程科学》 2010年第12卷第4期页码 14-20

摘要：

泰州大桥主桥采用主跨2×1 080 m三塔两跨两锚碇悬索桥，其中南、北锚碇基础为特大型沉井，矩形平面尺寸为67.9 m×52.0 m，高度分别为41 m,57 m。针对锚碇基础覆盖层深厚、基础尺寸巨大、沉井下沉深度深等特点，通过施工技术的攻关，顺利完成了砂桩复合地基处理、沉井制作和拼装、钢壳沉井混凝土填充、混凝土沉井接高施工、水力机械冲吸式排水下沉和空气吸泥机吸泥下沉等多项施工工序，为今后陆上特大型沉井施工提供了借鉴。文章简要介绍了南、北锚碇陆上特大型沉井的施工技术。

关键词：悬索桥锚碇沉井拼装深井降水地基沉降空气吸泥桥梁施工