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基于大数据理念的道桥结构健全性评价方法分析
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作者 李亮 李广慧 《建筑技术开发》 2019年第16期140-141,共2页
近年来,道桥结构趋向于向大跨度、多样式、复合型发展,在满足使用性能以及美观的同时也带来一些新的课题。采用大数据理念以及MEMS建立道桥结构安全性评价技术,通过收集研究对象资料,从理论上掌握其力学特性,并结合同类型桥梁数据建立... 近年来,道桥结构趋向于向大跨度、多样式、复合型发展,在满足使用性能以及美观的同时也带来一些新的课题。采用大数据理念以及MEMS建立道桥结构安全性评价技术,通过收集研究对象资料,从理论上掌握其力学特性,并结合同类型桥梁数据建立样本库;针对实测道桥对象进行振动测试试验,利用获取的加速度波形进行分析并提取振动频率、振型以及变形等基本特性值;融合理论计算与类比数据库及实测试验结果,引入大数据分析技术对具有相似结构类型的道桥进行分类汇总并提取其共性分析其不同点。通过对比分析实测数据与样本数据库,建立基于大数据的道桥结构健全性评价方法并确认该方法的可行性。 展开更多
关键词 道桥结构 健全性评价 大数据分析技术
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浅谈道桥结构的加固技术
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作者 郭锋 郭丰 《科技资讯》 2012年第24期43-43,共1页
随着我国交通事业的飞速发展,道路桥梁负荷不断增加,在自然与人为等因素作用下,部分道桥出现老化、破损现象,超出原先设计的承载标准,已不能适应现代交通运输的发展要求,因此迫切需要采用加固技术对现有损毁道桥进行修复,提高承载能力... 随着我国交通事业的飞速发展,道路桥梁负荷不断增加,在自然与人为等因素作用下,部分道桥出现老化、破损现象,超出原先设计的承载标准,已不能适应现代交通运输的发展要求,因此迫切需要采用加固技术对现有损毁道桥进行修复,提高承载能力。本文首先分析了道桥的病害成因,接着介绍了道桥加固流程,最后阐述了两种种值得借鉴的先进道桥加固技术。 展开更多
关键词 道桥结构 加固技术 预应力 锚喷
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桥道系结构形式对中承式钢管混凝土拱桥受力影响分析 被引量:5
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作者 周水兴 胡免缢 周先颖 《公路交通科技》 CAS CSCD 北大核心 2005年第4期57-60,共4页
在分析中承式钢管混凝土拱桥常用桥道系结构形式特点的基础上,首次提出一种新型的桥道系结构形式———简支连续组合桥道系,并运用大型结构有限元分析软件MSC Nastran进行数值仿真计算,研究不同桥道系结构形式对桥梁结构静、动力特征的... 在分析中承式钢管混凝土拱桥常用桥道系结构形式特点的基础上,首次提出一种新型的桥道系结构形式———简支连续组合桥道系,并运用大型结构有限元分析软件MSC Nastran进行数值仿真计算,研究不同桥道系结构形式对桥梁结构静、动力特征的影响。通过对比分析发现:不同桥道系结构形式对钢管混凝土拱肋的受力性能、结构的整体稳定性及动力性能的影响没有显著差异;简支连续组合桥道系较好地继承了简支和连续桥道系的优点,是中承式钢管混凝土拱桥的合理桥道系结构形式。 展开更多
关键词 中承式钢管混凝土拱 结构形式 结构分析
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浅谈道路桥梁结构问题及解决措施
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作者 迟冬梅 《科技创新与应用》 2012年第13期154-154,共1页
随着经济的发展,城市交通的进步,我国的道路和桥梁的建设数量日益增多。城市的道路桥梁建设存在着很多具体施工问题,难度较大,既要考虑具体施工位置问题,也要保证施工中遇到的临时问题能够很好的适时解决,施工位置的地质情况和施工过程... 随着经济的发展,城市交通的进步,我国的道路和桥梁的建设数量日益增多。城市的道路桥梁建设存在着很多具体施工问题,难度较大,既要考虑具体施工位置问题,也要保证施工中遇到的临时问题能够很好的适时解决,施工位置的地质情况和施工过程中面临的恶劣天气问题都会严重影响工程的正常进程,所以施工过程中必须充分考虑道路桥梁结构中遇到的问题,及时的采取相应的措施加以解决,本文将重点分析具体的道路桥梁结构中涉及到得问题和解决措施。 展开更多
关键词 道桥结构 病害问题 加固方法
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地面堆载对匝道桥结构的影响
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作者 王慧鹏 《科学家》 2015年第10期114-115,共2页
桥梁结构安全通常易受到位于桥梁附近地面堆载分染的影响,可基于道桥设计利用监测桥梁墩顶及其支座、梁体、伸缩缝等部位结构进行推测。本文通过分析某匝道桥的基本情况,通过对桥梁结构变位状况进行初步监测,并基于对桩基受力、桥梁... 桥梁结构安全通常易受到位于桥梁附近地面堆载分染的影响,可基于道桥设计利用监测桥梁墩顶及其支座、梁体、伸缩缝等部位结构进行推测。本文通过分析某匝道桥的基本情况,通过对桥梁结构变位状况进行初步监测,并基于对桩基受力、桥梁结构位移、桥墩及桥梁上部结构的初步探讨,对影响地面堆载的程度进行分析研究,基于此作为对桥梁后期加固维修施工的设计提供重要参考依据。 展开更多
关键词 地面堆载 施工 道桥结构
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论道桥施工中防水路基面施工技术 被引量:7
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作者 刘可 《北方交通》 2017年第5期93-94,98,共3页
对导致道桥防水路基面受损因素的分析,对相关施工技术进行初步探讨,有针对性地提出相应解决措施。
关键词 道桥结构 防水路基面 施工技术
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试析道路与桥梁基础施工技术要点 被引量:10
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作者 王欣 《黑龙江科技信息》 2014年第19期238-238,共1页
城市道桥施工结束后,道桥就会承载起城市交通运输,为了能够保证交通运输的安全,避免因为道桥出现问题而影响交通顺畅。现根据掌握的道桥情况,针对于城市道桥结构可能出现的病害成因进行分析,同时也对于施工过程中的问题进行整理,下面就... 城市道桥施工结束后,道桥就会承载起城市交通运输,为了能够保证交通运输的安全,避免因为道桥出现问题而影响交通顺畅。现根据掌握的道桥情况,针对于城市道桥结构可能出现的病害成因进行分析,同时也对于施工过程中的问题进行整理,下面就浅谈一下关于城市道桥施工要点。 展开更多
关键词 道桥结构 成因检测 技术要点
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Application and optimization design of non-obstructive particle damping-phononic crystal vibration isolator in viaduct structure-borne noise reduction
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作者 SHI Duo-jia ZHAO Cai-you +3 位作者 ZHANG Xin-hao ZHENG Jun-yuan WEI Na-chao WANG Ping 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第7期2513-2531,共19页
The problems associated with vibrations of viaducts and low-frequency structural noise radiation caused by train excitation continue to increase in importance.A new floating-slab track vibration isolator-non-obstructi... The problems associated with vibrations of viaducts and low-frequency structural noise radiation caused by train excitation continue to increase in importance.A new floating-slab track vibration isolator-non-obstructive particle damping-phononic crystal vibration isolator is proposed herein,which uses the particle damping vibration absorption technology and bandgap vibration control theory.The vibration reduction performance of the NOPD-PCVI was analyzed from the perspective of vibration control.The paper explores the structure-borne noise reduction performance of the NOPD-PCVIs installed on different bridge structures under varying service conditions encountered in practical engineering applications.The load transferred to the bridge is obtained from a coupled train-FST-bridge analytical model considering the different structural parameters of bridges.The vibration responses are obtained using the finite element method,while the structural noise radiation is simulated using the frequency-domain boundary element method.Using the particle swarm optimization algorithm,the parameters of the NOPD-PCVI are optimized so that its frequency bandgap matches the dominant bridge structural noise frequency range.The noise reduction performance of the NOPD-PCVIs is compared to the steel-spring isolation under different service conditions. 展开更多
关键词 non-obstructive particle damping phononic crystal vibration isolator band gap optimization floating-slab track bridge structure-borne noise control particle swarm optimization
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大跨悬索桥设计若干技术问题
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作者 陆宗林 《OVM通讯》 2000年第3期27-29,共3页
我国已开始进入建设现代化大跨径悬索桥的进程。本文结合国情和工作实践,对大跨径悬索桥的总体布置,大缆和桥道梁构造和工艺的若干技术问题进行了探讨。
关键词 悬索 设计 总体布置 吊索 结构 大跨径
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Longitudinal forces of continuously welded track on high-speed railway cable-stayed bridge considering impact of adjacent bridges 被引量:32
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作者 戴公连 闫斌 《Journal of Central South University》 SCIE EI CAS 2012年第8期2348-2353,共6页
A proven beam-track contact model was used to analyze the track-structure interaction of CWR (continuously welded track) on bridge. Considering the impact of adjacent bridges, the tower-cable-track-beam-pier-pile fini... A proven beam-track contact model was used to analyze the track-structure interaction of CWR (continuously welded track) on bridge. Considering the impact of adjacent bridges, the tower-cable-track-beam-pier-pile finite element model of the cable-stayed bridge was established. Taking a bridge group including 40-32m simply-supported beam and (32+80+112)m single-tower cable-stayed bridge and 17-32m simply-supported beam on the Kunming-Shanghai high-speed railway as an example, the characteristics of CWR longitudinal force on the cable-stayed bridge were studied. It is shown that adjacent bridges must be considered in the calculation of the track expansion force and bending force on cable-stayed bridge. When the span amount of adjacent bridges is too numerous, it can be simplified as six spans; the fixed bearing of adjacent simply-supported beams should be placed on the side near the cable-stayed bridge; the track expansion device should be set at the bridge tower to reduce the track force near the bridge abutment. 展开更多
关键词 high-speed railway continuously welded track cable-stayed bridge simply-supported beam
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Seismic Fragility of Approach Bridge for the Large Port Terminals
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作者 LIU Xinyue 《International English Education Research》 2016年第4期48-50,共3页
In order to study the seismic performance of typical approach bridge for port project, the seismic vulnerability model was created. 100 of the earthquake motion records are selected from the database of Pacific Earthq... In order to study the seismic performance of typical approach bridge for port project, the seismic vulnerability model was created. 100 of the earthquake motion records are selected from the database of Pacific Earthquake Research Centre, In order to obtain the maximum responses of structure dynamic response, the model was calculated by using non-linear time history analysis. Then reliability analysis method was used to generate the fragility curves of bridge components. And compared two kinds of bearing made differences to structure' s vulnerability. Researches show that bearing is easy to breakdown with earthquake action. Isolation bearing has good effect, and significantly reduces failure probability, fmaUy the fragility curves obtained can be used to evaluate the seismic performance of continuous beam bridge for port project, and provide the basis for seismic design of bridges for port project. 展开更多
关键词 Port project Approach bridge Seismic vulnerability Isolation bearing
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Elastic-plastic seismic response of CRTS II slab ballastless track system on high-speed railway bridges 被引量:11
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作者 YAN Bin LIU Shi +2 位作者 PU Hao DAI GongLian CAI XiaoPei 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2017年第6期865-871,共7页
China railways track structure II (CRTS II) slab ballastless track on bridge is one kind of track structures unique to China. Its main bearing component of longitudinal force is the continuous base plate rather than ... China railways track structure II (CRTS II) slab ballastless track on bridge is one kind of track structures unique to China. Its main bearing component of longitudinal force is the continuous base plate rather than rail. And the track-bridge interaction is weakened by the sliding layer installed between base plate and bridge deck. In order to study the dynamic response of CRTS II slab ballastless track on bridge under seismic action, a 3D nonlinear dynamic model for simply-supported bridges and CRTS II track was established, which considered structures such as steel rail, fasteners, track plate, mortar layer, base plate, sliding layer, bridge, consolidation, anchors, stoppers, etc. Then its force and deformation features under different intensities of seismic excitation were studied. As revealed, the seismic response of the system increases with the increase of seismic intensity. The peak stresses of rail, track plate and base plate all occur at the abutment or anchors. Both track plate and base plate are about to crack. Besides, the rapid relative displacement between base plate and bridge deck due to the small friction coefficient of sliding layer is beneficial to improve the seismic performance of the system. During the earthquake, a large vertical displacement appears in base plate which leads to frequent collisions between stoppers and base plate, as a result, stoppers may be damaged. 展开更多
关键词 railway engineering simply supported beam ballastless track seismic response elastic-plastic collision finite element analysis
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