大跨度大扭矩梁式转换层施工

ＴＲＡＮＳＦＥＲＥＤＳＴＯＲＥＹＣＯＮＳＴＲＵＣＴＩＯＮＯＦＡＢＩＧＳＰＡＮＡＮＤＨＥＡＶＹＭＯＭＥＮＴＴＷＩＳＴＥＤＢＥＡＭＢＵＩＬＤＩＮＧＤＩＮＧＹｏｎｇＬＩＱｉａｎＧＵＺｈｏｎｇｗｅｎ丁勇，浙江省第四建筑工程公司技术管理处，３１０１４，杭州收稿...     

成都王府井商城东楼A座结构转换梁施工技术

成都王府井商城东楼Ａ座结构转换梁施工技术罗近元罗严刘玲ＴＨＥＢＥＡＭ－ＴＲＡＮＳＦＥＲＲＩＮＧＴＥＣＨＮＯＬＯＧＹＦＯＲＣＯＮＳＴＲＵＣＴＩＯＮＯＦＥＡＳＴＡ－ＢＵＩＬＤＩＮＧＳＴＲＵＣＴＵＲＥＯＦＷＡＮＧＦＵＪＩＮＧＣＯＭＭＥＲＣＩＡＬＣＩＴＹＩ...     

UPVC排水管在高层建筑中的应用

ＵＰＶＣ排水管在高层建筑中的应用曲申酉，肖睿书，闫利国，刘宗秋（广西建筑综合设计院）ＲＥＳＥＡＲＣＨＯＮＡＰＰＬＹＩＮＧＵＰＶＣＤＲＡＩＮＰＩＰＥＳＩＮＨＩＧＨ－ＲＩＳＥＢＵＩＬＤＩＮＧＳ￥ｏｎＳｈｅｎｙｏｕ；ＸｉａｏＲｕｉｓｈｕ；ＹａｎＬｉｇｕｏ；...     

DEVELOPMENT INSIGHT

ＤＥＶＥＬＯＰＭＥＮＴＩＮＳＩＧＨＴＮＥＷＲＥＧＵＬＡＴＩＯＮＦＯＲＬＡＮＤＴＲＡＮＳＦＥＲＴｈｅＳｔａｔｅＬａｎｄＡｄｍｉｎｉｓｔｒａｔｉｏｎｈａｓｒｅｃｅｎｔｌｙｉｓｓｕｅｄｎｅｗｒｅｇｕｌａｔｉｏｎｆｏｒｌａｎｄｔｒａｎｓｆｅｒｉｎＣｈｉｎａ．...     

结构机理学（4）──桁架

结构机理学（４）──桁架丁大钧（东南大学）ＭＥＣＨＡＮＩＳＭＯＬＯＧＥＯＦＳＴＲＵＣＴＵＲＥＳ（４）－－ＴＲＵＳＳ￥ＤｉｎｇＤａｊｕｎ（ＳｏｕｔｈｅａｓｔＵｍｉｖｅｒｓｉｔｙ）４．１在图４．ｌａ中，已知梁内上下部分分别承受由边缘向中性轴逐渐减小的压应...     

我国新型模板推广应用中的新情况及对策建议

我国新型模板推广应用中的新情况及对策建议王绍民ＮＥＷＳＴＡＴＵＳＡＮＤＴＲＥＡＴＭＥＮＴＳＵＧＧＥＳＴＩＯＮＳＦＯＲＰＯＰＵＬＡＲＩＺＡＴＩＯＮＯＦＯＵＲＣＯＵＮＴＲＹ＇ＳＮＥＷＦＯＲＭＷＯＲＫＳＷＡＮＧＳｈａｏｍｉｎ王绍民，中国模板协会，常务理事...     

蜂窝梁的应用和计算方法

蜂窝梁的应用和计算方法王洪范，王立新（吉林建筑工程学院）ＴＨＥＡＰＰＬＩＣＡＴＩＯＮＡＮＤＣＡＬＣＵＬＡＴＩＯＮＭＥＴＨＯＤＯＦＣＡＳＴＥＬＬＡＴＥＤＢＥＡＭＳ￥ＷａｎｇＨｏｎｇｆａｎ；ＷａｎｇＬｉｘｉｎ（ＪｉｌｉｎＡｒｃｈｉｔｅｃｔｕｒｅａｎｄＣｉ...     

工具挑梁套管式升降脚手架的研制与工程应用

工具挑梁套管式升降脚手架的研制与工程应用郭正兴陈亚平陶春来ＭＡＮＵＦＡＣＴＵＲＥＲＥＳＥＡＲＣＨＡＮＤＣＯＮＳＴＲＵＣＴＩＯＮＡＰＰＬＩＣＡＴＩＯＮＯＦＥＱＵＩＰＰＥＤＣＡＮＴＩＬＥＶＥＲＳＯＣＫＥＴＪＯＩＮＴＰＩＰＥＬＩＦＴＳＣＡＦＦＯＬＤＧＵＯＺ...     

钢管混凝土柱双钢筋密肋楼板升板结构试验建筑的设计与施工

钢管混凝土柱双钢筋密肋楼板升板结构试验建筑的设计与施工张晋元赵奎生杨少元ＤＥＳＩＧＮＡＮＤＣＯＮＳＴＲＵＣＴＩＯＮＯＦＴＨＥＳＴＥＥＬＴＵＢＥＲＥＩＮＦＯＲＣＥＤＣＯＮＣＲＥＴＥＣＯＬＵＭＮＡＮＤＤＯＵＢＬＥ－ＲＥＩＮＦＯＲＣＥＤＲＩＢＢＥＤＦＬＯＯ...     

升降脚手架的型式与发展综述

升降脚手架的型式与发展综述郭正兴ＡＣＯＭＰＲＥＨＥＮＳＩＶＥＩＮＴＲＯＤＵＣＴＩＯＮＡＢＯＵＴＴＹＰＥＳＡＮＤＤＥＶＥＬＯＰＭＥＮＴＳＯＦＬＩＦＴＳＣＡＦＦＯＬＤＧＵＯＺｈｅｎｇｘｉｎｇ升降脚手架因其经济效益显著已得到了大量应用，但在大面积推广应用...     

巨型空间钢框架结构的二阶实用分析

为了探讨巨型空间钢框架结构二阶分析的实用方法,从简化结构的计算模型入手,采用连续化概念和刚度等效原则,将立体格构式巨型构件等效为三维实腹式构件,在对巨型梁柱的节点域进行等效后获得巨型钢框架结构的三维等效模型,据此建立结构的二阶分析刚度方程,并用数值算例检验了该方法的实用性与可靠性。方法可供结构方案设计或初步设计时参考。     

Zur Leistungsfähigkeit,korrekten Anwendung und Kontrolle von EDV‐Programmen für die Berechnung räumlicher Stabwerke im Stahlbau (Teil 1)

On performance, correct use and control of computer programs for structural analysis of three‐dimensional steel frameworks. Structural analysis of three‐dimensional steel frameworks is normally carried out by means of computer programs based on second or higher order theory. The present article classifies under special consideration of equivalent imperfections, whether these simplified theories are adequate or if additional terms are necessary to obtain sufficiently accurate results in practical engineering in any case. For software producers and users, several simple examples are presented, in order to demonstrate the general performance of a software. Furthermore important hints are given for the correct use of computational software developed for statical framework calculation.     

Linear and nonlinear seismic response of a 52‐storey steel frame building

This paper presents the results of a study on the seismic behaviour of a well‐instrumented 52‐storey steel frame building in Los Angeles, California. This building has been subjected to ground motions from several earthquakes among which the records obtained during the 1991 Sierra Madre earthquake and the 1994 Northridge earthquake were selected for this study. Detailed time and frequency domain analyses of the recorded motions from these two earthquakes were conducted to determine the dynamic characteristics of the structure. This information was used to calibrate a three dimensional dynamic computer model of the building. Nonlinear dynamic computer analyses were then employed to investigate the response of the structure during severe ground shaking. The results of this study showed that by performing a linear three‐dimensional analysis, the response of the building during past earthquakes can be reproduced with confidence. The results also show that because of the torsional response of this high‐rise building is not negligible, two‐dimensional analysis is not feasible for reliably predicting its nonlinear response during earthquakes. By further performing a nonlinear three‐dimensional analysis, the state and sequence of damage could also be predicted. The study also included an investigation of the effectiveness of pushover analysis for predicting the nonlinear behaviour of the building. This type of analysis has the deficiency of excluding the participation of higher modes, which is obvious for high‐rise buildings, especially for shaking from near‐field type ground motions. Improvements to the pushover analysis for such a type of shaking were explored. Copyright © 2000 John Wiley & Sons, Ltd.     

非饱和土孔隙气、水、汽、热耦合运动之模拟(英文)

旨在介绍一个描述非饱和土孔隙气、水、汽、热耦合运动的理论模型。该模型假定孔隙气和孔隙水运动分别遵循达西定律 ,而影响水蒸汽运动的两种主要因素分别是分子扩散和孔隙气运动 ,其中受分子扩散影响的孔隙水蒸汽运动可用Fick定律描述。热转移则主要包括了三种形式 ,即传导、对流和汽化潜热。根据有限单元法 ,编制了一个三维的计算机程序用以模拟非饱和土孔隙气、水、汽、热的耦合运动。通过数值分析与干沙试验结果之比较 ,验证了文中之理论模型和计算机程序的可靠性     

Three-sided heating of I-beams in composite construction exposed to fire

A new and simplified model to analyse the thermal response of steel I-beams in composite construction exposed to the standard fire is presented. The model includes a convection and radiation heat transfer module, a resistance-capacitance formulation for heat conduction in the steel beam and a correlation for estimating heat conduction from the upper flange to the concrete slab. The radiation component accounts for the emission and absorption of radiation by the main combustion products of the standard fire. Heat transfer to the concrete is estimated using computer modelling of a number of case studies. The two dimensional I-beam section is represented by three lumped masses concentrated at nodes located at the centres of the lower flange, web and upper flange and connected by conduction paths. Comparison between measured and computed temperature profiles shows good correlation for most of the case studies investigated.     

伽辽金边界元法在平面问题极限分析中的应用

基于极限分析的下限定理,利用伽辽金边界元方法对二维结构进行离散,建立了结构极限（下限）分析的计算格式。利用弹塑性增量算法中同一增量步上不同迭代步的应力差作为基矢量构造了自平衡应力场,然后通过复合形法直接求解该非线性规划问题,得到了二维结构极限载荷下限乘子。计算结果表明了本文采用的方法的有效性。     

Probleme bei der Berechnung von Stahlbetonkonstruktionen mittels dreidimensionalen Gesamtmodellen

Design of three‐dimensional Finite Element Models In practice, complex three‐dimensional finite element models of an entire structure are used more and more often to design a reinforced concrete building. As daily experience shows, results from computer analysis are often trusted with blind faith. For reasons of time, the required checking of the model as well as a clear documentation of the main results remain undone. This development raises questions regarding the safety of structures in the future. The various problems of a complex 3‐d finite element analysis will be demonstrated by a simple structure, an arch bridge. It will be shown, that no software is able to design this bridge, at least in parts. An independent checking of the computer results is always required.     

考虑节点域变形效应的空间支撑钢框架结构二阶弹塑性分析

详细推导了基于非线性连续介质力学理论和考虑剪切效应的稳定插值函数所建立的严格三维梁柱单元虚功增量方程和切线刚度方程, 该方程包含了轴向、剪切、双向弯曲与扭转及其各耦合效应。提出的三维单元简化塑性区模型可模拟塑性扩展。建立了考虑支撑效应的节点域剪切变形模型, 该模型可更真实地反映节点域的变形影响。使用包括几何、材料非线性和节点域变形影响的数值算例来检验本文方法和所编计算机程序的可行性、有效性与精确度。算例表明: 利用该程序, 每个构件只需一个单元即可准确预测三维结构的极限荷载与失稳模态, 可提高结构非线性空间性能的分析效率。该程序可用于三维结构的非线性全过程分析, 为建立高层钢结构的高等分析方法奠定了基础。     

三维离散元法中地下水及锚杆的模拟

基于采用动态松弛法求解的三维离散单元法,提出了地下水、锚杆的三维分析方法,给出了相应的算法和公式,并通过算例进行了验证。     

Computer‐assisted environmental design system: Regional information visualizer

The author has been developing computer‐assisted environmental design systems. One is a computer mapping system. Another is a landscape simulation system. This paper reports only a computer mapping system on account of space considerations. The computer mapping system deals with a wide area, based on a small‐scale map drawn on a scale of 1:25 000. This system is combined with a commercially available CAD system, database management (DBM) system, and databases to visualize the regional information in Keihanna Science City (KSC) and the lower reaches of Yodo River (LRYR), Japan. It is emphasized that a three‐dimensional representation of the digital terrain model has been generated. The visualized data can be imported and exported among some application programs using a standard CAD data format. Thus, CG techniques such as texture mapping can be used easily. Consequently, the system expands the visualization of the regional information in cooperation with some platforms. This paper reports the developing process of the system and the conversion process of the visualized data.