查询词典 span roof

The cast-in-place reinforced concrete spatial core beamless roof is one kind of new beamless roof system, it is self-possessed lightly, the span is big, after is continues the belt capital of column the beamless roof, the plate beamless roof, the dense rib beamless roof, complies with the time to the beamless roof system request new beamless roof system, at present already entered the use in some engineering project upthrow, has obtained the good economic efficiency and the social efficiency.

现浇钢筋混凝土空心板无梁楼盖是一种新型的无梁楼盖体系，它自重轻，跨度大，是继带柱帽的无梁楼盖、平板无梁楼盖、密肋无梁楼盖之后，顺应了时代对无梁楼盖体系要求的新型无梁楼盖体系，目前已经在一些工程项目上投入使用，取得了良好的经济效益和社会效益。

The mechanical behavior of Shape Memory Alloys material is tested, and the constitutive model of the SMA is established. A kind of SMA combined rubber isolator is developed, and the isolation effect of the SMA combined rubber isolator for long-span bridge and tall building structures is numerically simulated, from which the adaptive isolation performance and the self-restoring capacity of the SMA combined rubber isolator are verified. A kind of SMA damper is developed, the mechanical behavior of the SMA damper is tested, and the model of restoring force of the SMA damper is established. The theory and method of adaptive control based on the SMA damper for the long-span bridge are built, and the effectiveness and reliability of the adaptive control for the long-span bridge using the SMA damper are verified through numerical simulation and model test. The MRF-04K type magnetorheological damper is developed, the mechanical behavior of the MR damper is tested, and the model of restoring force of the MR damper is established. The theory and method of adaptive control based on the MR damper for the long-span bridge and tall building structures are built, and the effectiveness and reliability of the adaptive control for the long-span bridge and tall building structures using the MR damper are verified through numerical simulation and model test. In addition, the theory and method of sub-structural damage identification for long-span bridge are derived, the influence of soil-structure dynamic interaction on the seismic isolation and control effects with different isolation and control measures and the damage responses and the sliding base-isolation of large structures under the excitation of underground explosion are investigated.

试验研究了形状记忆合金材料的力学性能，建立了SMA材料的本构模型；研制了一种SMA复合橡胶隔震支座，数值仿真分析了应用SMA复合橡胶支座的大跨桥梁和高层建筑结构的隔震效果，从而验证了SMA复合橡胶支座的自适应隔震性能及其震后自恢复能力；研制了一种SMA阻尼器，试验研究了SMA阻尼器的力学性能，建立了SMA阻尼器的恢复力模型，建立了基于SMA阻尼器的大跨桥梁结构自适应控制理论与方法，通过数值仿真与模型试验验证了大跨桥梁结构SMA阻尼器自适应控制的有效性与可靠性；研制了一种MRF-04K型磁流变阻尼器，试验研究了MR阻尼器的力学性能，建立了MR阻尼器的恢复力模型，建立了基于MR阻尼器的大跨桥梁和高层建筑结构的自适应控制理论与方法，通过数值仿真和模型试验验证了大跨桥梁和高层建筑结构MR阻尼器自适应控制的有效性与可靠性；还建立了大跨桥梁结构的子结构损伤识别的理论与方法，研究了土-结构动力相互作用对不同隔震和控制措施的减震控制效果的影响以及地下爆炸波作用下各类大型结构的灾害响应与滑移隔震。

The researches show that self-stability span is synthetical reflection of surrounding rock stability, so sub-classification standard can be constituted based on it. Surrounding rock self-stability span can divide into long-term stability span, basic stability span, temporary stability span and instability span.

研究结果显示：围岩自稳跨度是围岩自稳性的综合反映，围岩自稳跨度可分为长期稳定跨度、基本稳定跨度、暂时稳定跨度和不稳定跨度。

Common form of the roof surface: arch roof , shell-shaped roof of shoes, V-shaped hull roof , flat roof shell, wheel-shaped cable roof , saddle -shaped roof .

曲面屋顶常见形式有：拱屋顶、球鞋形网壳屋顶、V 形壳屋顶、扁壳屋顶、车轮形悬索屋顶、鞍形屋顶。

The text obtains some data that caving span of immediate roof is 30m, caving span of main roof at first weighting is 42m and caving span of main roof at periodic weighting is 14m. Mining influence range is determined about 40m through numerical modeling, namely about three advance pillars were in the range of mining influence.

利用数值模拟得出煤柱采场直接顶的垮落步距为30m，老顶的初次来压步距为42m，老顶的周期来压步距为14m；通过模拟超前支承压力，确定了采动影响范围约为40m，即采场超前的三个煤柱都在影响之内。

This paper presented the relationships between roof shapes and form coefficient under wind loads, drainage and corresponding loads caused by rain. The paper also discussed the relationship between roof shape and roof structural height and span and the relationship between roof shape and connection styles. These relationships will influence both safety and price of roof structure.

阐述了屋面形状与风载体型系数、屋面排水及相应雨水荷载的关系问题，讨论了屋面结构形式与屋面跨度和厚度的关系问题、屋面形状与钢结构节点形式的关系问题，这些问题对大型场馆钢结构屋面的安全性、经济性均有显著影响。

It is important to reduce the span of the hard roof to avoid its impact load on supports. However, at longwall top coal caving face, the periodical weight of roof is a main factor that crushes the top coal, which is beneficial to the top coal recovery. How to use the roof pressure safely is of crucial importance in top coal caving. Based on field monitoring, theoretical analysis of strata movement, the numerical model of compound structure of hard roof stepped cantilever and the top coal cantilever beam is built, and the parameters of the model are also determined. The elasto-plastic finite element method is used to analyze the effect of hard coal fracture under the abutment pressure of hard roof, and the cracking coefficient is defined according to the stress state of the element.

通过对岩层移动的现场观测，建立了&两硬&条件综放采场台阶悬臂—悬臂梁组合的煤岩组合结构力学模型，并以此煤岩结构为基础，建立&两硬&条件综放采场顶煤压裂的有限元数值模型，分析了坚硬顶板不同来压步距对坚硬顶煤的压裂效应，并确定了合理的支架阻力，从而对坚硬顶板进行有效的控制，消除坚硬项板对采场的冲击隐患，同时保证采场矿压对坚硬顶煤的有效压裂，达到提高顶煤回收率之目的，由此形成了坚硬顶煤、坚硬顶板条件下综放采场围岩控制的基本理论和方法。

Aiming at bottom roof caving and support impact problems induced with abrupt large scale caving upper roof in face 21303 of Daliuta mine, this paper put forward the motion parameter at roof caving and calculation formula of roof shear breaking force with the help of theorem of momentum, theorem of moment of momentum and D' Alembert principle. Roof caving process was simulated by Ansys Ls-DYNA program, and maxim impact force was got. The theoretical research outcomes in the paper were applied in face 21303 of Daliuta mine, and were accordant with actual observing status of roof caving process.

针对神东煤炭公司大柳塔煤矿活井21303综采工作面，上层采空区顶板突然大规模垮落对下层顶板及支架的突然冲击问题，文章采用动量定理、动量矩定理、达朗伯原理推出了顶板垮落瞬间的运动量及顶板切顶垮落所需要的剪力值计算公式，用ANSYS LS-DYNA程序对顶板垮落过程进行了数值计算，得到了最大冲击力，在大柳塔煤矿活井21303综采工作面对顶板垮落特征进行了实际观测和理论成果验证。

Based on the present findings, it appears that all the Taiwan WAIS-Ⅲ working memory index, the single Arithmetic and the Digit Span subtests, and the span scores of the Digit Span subtest could adequately discriminate individuals without working memory impairment, but had poor sensitivity on detecting the patients who evidenced working memory impairment. Accordingly, it is suggested that clinicians should gauge the working memory index by a composite of the Arithmetic, the Digit Span, and the Letter-Number Sequencing subtests if possible. Otherwise, a caveat should be taken with care to interpret the working memory index, as estimated by a composite of the Arithmetic and the Digit Span subtests, because the chance of the increasing false negative rate becomes ineludible.

综合上述，显见WAIS-Ⅲ中文版中之工作记忆指数、单一算术及单一记忆广度分测验、或记忆广度分测验之各项广度值在区分患者有无工作记忆功能异常上皆拥有良好之区辨力，但对侦测工作记忆功能异常患者的敏感度普遍不佳，建议临床工作者应尽量取得算术、记忆广度、与数－字序列等三项分测验组合所估算之工作记忆指数；若在有限条件下，临床工作者仅能以算术与记忆广度两项分测验之组合所估算之工作记忆指数来评估受试者工作记忆，应留意假阴性比例上升的问题。

The indoor experiment of mechanical parameters of rock is performed to provide a series of mechanical parameters of rock-mass needed in numerical simulation of abandoned stope disposal.(3) The minimal roof span, the minimal cantilever roof span and roof cutting depth are studied by the 3D non-linearity FEM code ANSYS.

开展了室内岩石力学参数试验，提出了数值模拟研究所需要的岩体力学参数；(3)应用三维ANSYS有限元程序研究了顶板极限跨度、悬臂状态下的顶板极限跨度和切顶深度。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。