Results 31 to 40 of about 3,519 (166)
Jianzhu Gangjiegou Jinzhan, 2018 大型商业建筑中庭的大悬挑梁和大跨连廊的结构设计往往由人致振动舒适度指标控制,有必要采用有效的减振措施。整理了各国的舒适度评价指标,把大型商场人行激励按照步频分为密集人流慢走和快走6个工况,采用调频质量阻尼器(TMD)系统对实际工程进行减振控制,包含单模态控制TMD、多模态控制MTMD和单模态控制MTMD。对8.678m跨度悬挑梁、26m跨度侧挑1.9m和3.9m钢连廊进行TMD系统减振分析,基本覆盖了大型商业建筑的需求。结果表明安装TMD、MTMD系统后结构的最大竖向加速度幅值明显减小 ...
胡振青, 蔡琪锐
doaj
, 2016 渤海海峡跨海通道工程以鲁东大学为代表的众多专家已研究、论证20 余年。工程建设意向方案有三:利用庙岛群岛作为桥墩的桥梁方案、南桥北隧方案、全海底隧道方案。笔者上世纪80 年代参与过胶州湾青黄通道论证,关注过渤海海峡跨海通道工程,并有机会考察国内外多个大型跨海通道工程。根据积累的经验,将渤海海峡跨海通道与胶州湾青黄通道做一些对比,得出的基本认识:桥梁易受气象、海洋环境影响和战争破坏,不赞同这种方案;桥隧方案与桥梁方案一样,只不过桥的距离短一些;若工程上马的话,建设全程海底电气化铁路隧道为宜 ...
刘洪滨
core
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study examines multilingual practices in research interviews, focusing on English lexical insertions in Chinese‐language research interviews with teachers of Chinese in Australian secondary schools, and treating these code‐switches as analytically meaningful rather than incidental.
Chengwen Yuan, Tianwei Zhang, Gary Bonar
wiley +1 more source
Comparative Study on Structure Scheme of the Large-span Floor [PDF]
, 2016 楼盖在多层建筑结构中作为竖向承重部件的同时，协调楼层水平抗侧力构件共同承担水平荷载作用。新出现的多层工业或公共建筑中，由于要求较大的无柱空间使得楼盖的跨度变大，综合考量楼盖结构的自重、承载力、变形刚度、抗震安全性能，选取安全可靠的楼盖结构体系成为了十分重要的工作。 本文根据一实际建筑的平面尺寸，以内部米无柱空间上的楼盖为例，分别采用常规钢筋混凝土密肋楼盖，钢筋混凝土空腹网架结构，钢网格空腹夹层楼盖，钢管桁架混凝土板组合楼盖结构四种体系进行设计试算。在满足相同使用要求，相同工程条件下，以安全、经济 ...
纪似玉
core
Prediction of water inflow after excavation of underground chamber group with long span and high buried depth [PDF]
Predict the water inflow after excavation of large underground caverns is crucial for the safe construction and operation of underground engineering. To predict the water inflow of underground caverns after excavation and provide guidance for drainage ...
Guanghong JU +5 more
core +1 more source
Policy Studies Journal, EarlyView.Abstract Studies of lobbying typically look at the extent to which interest groups realize political goals on issues they actively lobby for. Little is known, however, about the extent to which interest groups attain their political goals without making an active lobbying effort.
Marcel Hanegraaff +2 more
wiley +1 more source
, 2016 渤海海峡跨海通道建设项目既是21 世纪世界级的重大交通项目,也是贯通山东半岛与辽东半岛的重大社会性基础设施项目。除大桥本身设计方面需要解决的关键技术问题外,项目整体规划设计应按照国际一流水平标准,项目的各种设施和生态修复等工程应该在工艺设计、景观设计等方面精心雕琢,打造新型隧桥文化与旅游文化;并以高水平通道规划和建设带动长岛和通道两端的旅游资源保护和旅游开发建设,打造跨越渤海海峡的海上旅游大通道和世界级旅游景群,使跨海通道建设水平和知名度提升,生态环境更趋良好 ...
赵林, 赵林 白青娜 于睿
core
Model test study on bearing effect prestressing anchors in shallow buried tunnels [PDF]
The use of prestressing anchor active support technology in tunnel engineering is becoming morecommon.However, the support characteristics and mechanism of action have not been fully understood for shallow, large-span rocky tunnels.In order to ...
CAO Lixue +4 more
core +1 more source
Legislative Attention and Nonprofit Efficiency: A Link Across Sectoral Boundaries
Policy Studies Journal, EarlyView.ABSTRACT Government attention matters for nonprofit management and nonprofit‐government interactions. This study focuses on legislative attention, an important yet less‐studied aspect of government attention in public policy research, and examines its impact on nonprofit efficiency.
Yuhao Ba, Jessica Berrett, Jason Coupet
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2017 利用经试验验证的有限元模型对均匀温度和不均匀温度分布下轴向约束波纹腹板梁的悬链线效应进行了参数分析,选取荷载比、轴向约束刚度比、跨高比及倾角为主要参数,研究了钢梁的跨中挠度、梁端轴力和悬链线弯矩等随温度的变化规律,并给出了火灾下钢梁的临界温度。由于不均匀温度下产生的热弯曲,钢梁在压力阶段的挠度更大而轴力更小。但均匀温度下钢梁的破坏温度比不均匀温度情况时高。钢梁的悬链线温度和破坏温度都随着荷载比的增大而降低。相同荷载比作用下,不同跨高比钢梁的悬链线温度相同,但其破坏温度随跨高比的增大而升高 ...
陈恒超, 刘昌斌
doaj