共查询到20条相似文献,搜索用时 109 毫秒
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针对火灾后某厂房钢屋架结构的鉴定进行了探讨,依据燃烧时间以及现场残留物的变形形态判定火灾温度,结合现场取样对原材料力学性能、现场对结构构件进行检测及结构构件分析校核计算来对车间进行结构鉴定及评级,为建筑物修复加固提供了依据。 相似文献
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对火灾后的某二层框架结构公寓大堂的现场进行了检测,通过观察混凝土表面颜色对火灾最高温度进行的分析,探讨了运用回弹和取芯方法对火灾后梁柱板构件混凝土强度影响程度进行的评估方法,以及通过变形测量对构件刚度变化进行的评估方法,最后根据现场检测结果评定了结构构件在火灾后的损伤程度,为结构构件的加固提供了依据。 相似文献
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通过对某商场地下室火灾后的检测鉴定,阐述了混凝土结构构件火灾后检测鉴定方法的程序和内容。根据对现场火灾发生情况的调查,并结合相关规范,对结构构件的相关性能指标进行了检测,对受火构件进行评级。并根据评级结果提出了相应的技术处理措施。 相似文献
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结合某项目地下车库的实际情况,详细叙述了对该项目地下车库不同区域内各种结构构件的现场检查检测情况,并根据现场检测情况,仔细分析各种结构构件出现变形的直接原因以及目前对地下车库整体结构的影响程度等进行了评判,最后综合考虑出现地下车库上浮的各种因素,分析其上浮破坏的原因及提出可行的处理措施。 相似文献
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某电石炉厂房及配料站由于遭受火灾,导致结构出现较大损伤,为了消除火灾事故后结构的安全隐患,需要对厂房进行全面的火灾后结构安全性检测鉴定和加固。现场调查分析了火灾后结构的受损情况,并对构件表面的过火温度进行了推定。在受损构件混凝土强度检测、钢筋力学性能检测、构件变形检测的基础上,考虑构件材料强度的折减,对受损结构的承载能力进行了验算校核,最终对该厂房及配料站火灾后结构的安全等级进行了评定,并探讨了加固修复的方案。 相似文献
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对工程设计中的建筑模型、结构模型以及结构力学分析模型之间的关系和采用边界表达技术描述的结构构件的空间拓扑关系进行分析,提炼与结构分析相关的构件几何关系。针对基于三维的建筑模型到结构模型转换过程中信息失真问题,结合空间直线段与三角形面片相交的数学推论,提出一种判断三维构件之间相交关系的简化算法,并基于此简化算法分别对线性和面类构件之间的相交节点进行归类和优化处理,并对各类构件之间相交节点定义优先权的程序算法进行设计。通过程序对简化算法和节点优化方法进行实例应用,结果表明,该方法有助于建筑结构模型转换中对基本构件信息正确地提取和定位,对促进工程设计中的协同工作具有一定的参考价值。 相似文献
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介绍了结构构件设计中轴压比、剪跨比、跨高比、配筋率等常用参数的含义,并详细研究了构件常用参数的具体估算方式,以更好的理解构件的各种性能指标及控制参数,设计出经济、安全的结构构件。 相似文献
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Gilberto Mosqueda Rodrigo Retamales Andre Filiatrault Andrei Reinhorn 《The Structural Design of Tall and Special Buildings》2009,18(4):387-404
The seismic vulnerability of non‐structural components and equipment with their expensive recovery and/or replacement costs has been demonstrated during past earthquakes. With the exception of the nuclear industry, the limited data collected from past earthquakes are not sufficient to completely characterize the seismic behaviour of non‐structural components and to develop effective mitigation measures. To address these limitations, the University at Buffalo has commissioned a dedicated non‐structural component simulator (University at Buffalo non‐structural component simulator (UB‐NCS)) composed of a two‐level testing frame capable of simultaneously subjecting both displacement and acceleration‐sensitive non‐structural components to realistic full‐scale floor motions expected within multi‐storey buildings. Current codes now require seismic qualification of important non‐structural components, and protocols for experimental qualification have been developed considering existing laboratory limitations. The new testing capabilities provided by the UB‐NCS are described to demonstrate the improved and more realistic qualification procedures that can be achieved. Results are presented from a test on two parallel partition walls aimed to verify the capabilities of the UB‐NCS. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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Sound protection of structural components made from mineral materials as a function of the setting time. For structural components made from mineral materials, e.g. slabs and walls made from masonry or concrete, screed or cavity floors, the acoustic properties relating to impact and airborne sound protection are expected to change over time. This is due to the fact that the strength increases during the setting process while the mass decreases during the drying process. This article describes the sound insulation characteristics of typical structural components over time during the setting/drying process and defines the intervals after which the state reached after 28 days can be determined with acceptable accuracy. 相似文献
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Jiangmeng Guo Luji Wang Jiazeng Shan 《The Structural Design of Tall and Special Buildings》2023,32(11-12):e2039
Hysteresis behavior of structural components has been one of the research focus for the structural engineering community for decades, comprehensively determines the structural performance and safety, and plays an important role in structural disaster mitigation. It is of great significance to continuously monitor structural responses and accurately characterize structural hysteresis. Currently, the nonlinear properties of real-world structural components cannot be obtained before its failure. Thus, a historical database is collected firstly. Then, a data-driven analysis method is proposed for predicting hysteresis behaviors of reinforced concrete (RC) columns. A bidirectional LSTM (BLSTM) network is developed to model and predict hysteresis curves. The data with unfixed lengths are specially processed to simultaneously guarantee a uniform size and avoid data loss, and the clipping layers are inserted in the model to clip off inferior predictions and improve the accuracy. This methodology is systematically studied and validated by employing a sythetic database generated by numerical simulation and the full-scale experiment database named PEER database. Result shows that proposed BLSTM can predict the hysteresis curves of the RC components with acceptable accuracy and robustness. Moreover, the interpretability analysis is performed on identifying the learning and prediction principle of the BLSTM model on hysteresis prediction and its accuracy variation under different model architectures. 相似文献
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大型轮式装载机动臂部件是关键结构件,在恶劣工作环境中,容易因破坏而失效。采用两种方法对其进行分析:一种是应用多体动力学与有限元相结合的方法,首先在ADAMS中建立装载机整体结构件系统的刚-弹耦合动力学模型,进行作业过程的动力学分析,然后在ANSYS中建立整体结构件系统的三维有限元模型,研究各部件间连接的模拟,对装载机工作过程典型工况进行有限元分析,获得动臂结构性能特征;另一种是应用传统方法,对动臂部件单独分析,找到动臂上的危险部位。对两种方法进行对比,结果表明:刚-弹耦合整体系统结构分析,可精确求得各铰点受力大小,使整个系统动力学仿真更加接近真实情况。基于刚-弹耦合的多体系统模型,考虑各部件间相互影响,可以更加直观地发现整体结构中的薄弱部位,而薄弱环节就是实际使用中出问题的部位,由此说明装载机刚一弹耦合整体系统结构分析的合理性与实用性。 相似文献
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浅探房屋建筑的结构概念设计 总被引:1,自引:1,他引:0
根据房屋建筑结构设计相关规范,结合地震情况,从场地选择、结构高宽比、结构平面及竖向布置、结构体系布置及结构构件等方面对结构抗震概念设计进行了探讨,以期设计抗震性能良好的建筑。 相似文献