共查询到19条相似文献,搜索用时 109 毫秒
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厦门某燃气电厂2×350MW级燃气-蒸汽联合循环发电机组采用SIEMENS公司设计,机岛预留孔洞、预埋件,预埋螺栓繁多;且基础钢筋密集,采用钢筋直径较大,预埋件埋设分布广泛,梁底、梁侧、梁顶、剪力墙侧面、剪力墙顶面均有预埋件分布,钢筋绑扎和预埋件安装冲突严重,施工顺序出现反复交替施工现象(预埋件安装-钢筋绑扎-预埋件安装-钢筋绑扎-预埋件按装)。本文对如何保证预埋件和螺栓的位置准确,介绍了一些成功的经验。 相似文献
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凝土剪力墙施工质量是整个建筑工程中最为关键之一,也是建筑物的根本,如何确保剪力墙受力筋保护层偏差、剪力墙受力筋间距、绑扎横向钢筋间距、预埋件水平高差成为剪力墙施工质量控制要点。通过如何控制剪力墙施工质量,及施工过程中重点工序的控制提高混凝土剪力墙施工合格率。 相似文献
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为了提高装配式钢结构基础定位螺栓的安装速度以及定位精度,在传统预埋螺栓工艺的基础上进行改良。基础螺栓采用在非承台施工位置整体提前制作,待承台底部钢筋绑扎完成后,用机具吊装已经制作好的整体螺栓放置到承台里面;待承台的面部钢筋绑扎完成后,将螺栓整体一次安装、定位。实践表明:与传统预埋螺栓工艺相比,该技术能够将承台钢筋绑扎完成到浇筑混凝土之间的技术间隔时间降低到零,投入到现场的工人只有传统工艺的1/3。混凝土浇筑完成后,螺栓定位精度满足要求,不需要采用火焰二次矫正。 相似文献
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现浇混凝土空心无梁楼盖施工可以从施工工艺、技术要点、构造要求、质量控制和质量标准5个主要方面来控制施工质量.
1.施工工艺
楼层测量放线→结构模板安装→顶板结构模板放线(定位水泥空心管)→清扫模板→安装暗梁及顶板下部钢筋、保护层垫块→水泥空心管定位钢筋网片及水泥空心管安装→定位网片与底层钢筋绑扎固定(抗浮拉结)及安装预埋件→检查验收预埋件及空心管敷设质量→安装上部钢筋→定位钢筋网片与上部钢筋绑扎固定→水泥空心管修补→隐蔽工程验收→搭设混凝土浇筑施工马凳→敷设混凝土泵送管→管底混凝土浇筑振实→上部混凝土浇筑振实→找平搓毛. 相似文献
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以某高层剪力墙结构住宅建筑为例,结合工作经验,对其钢筋工程绑扎施工做了简要介绍,主要从基础底板和基础梁钢筋绑扎、剪力墙及暗柱钢筋绑扎、独立柱钢筋绑扎、梁板钢筋绑扎等方面进行了探讨,以供参考。 相似文献
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为解决装配式建筑剪力墙T形节点钢筋绑扎施工中容易出现的"扳、弯、割、少"等钢筋绑扎质量问题,在施工过程中,对钢筋绑扎方法进行了创新。通过采用分段提升绑扎的方法,简化了施工流程,降低了现场施工绑扎难度,提高了施工效率及节点部位的施工质量,保证了装配式剪力墙节点处的安全性能,具有一定的推广价值。 相似文献
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随着建筑行业的迅猛发展,在高层建筑中大范围的使用剪力墙结构,而钢筋绑扎在剪力墙中属于非常重要的一部分,钢筋绑扎在一定程度上影响着剪力墙结构的可靠性以及稳定性。本文细致的分析了剪力墙中钢筋绑扎的施工技术,并简要的论述了剪力墙钢筋绑扎施工技术中经常出现的质量问题,对出现的问题给予适当的解决方法以及预防措施。 相似文献
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Shear strength of the connection between a steel coupling beam and a reinforced concrete shear wall in a hybrid wall system 总被引:1,自引:0,他引:1
Wan-Shin Park Sun-Kyoung Hwang Il Seung Yang 《Journal of Constructional Steel Research》2005,61(7):912-941
No specific guidelines are available for computing the shear strength of the connection between a steel coupling beam and a reinforced concrete shear wall in a hybrid wall system. There were carried out analytical and experimental studies on the connection between a steel coupling beam and a concrete shear wall in a hybrid wall system. The bearing stress at failure in the concrete below the embedded steel coupling beam section is related to the concrete compressive strength and the ratio of the width of the embedded steel coupling beam section to the thickness of the shear walls. Experiments were carried out to determine the factors influencing the shear strength of the connection between a steel coupling beam and a reinforced concrete shear wall. The test variables included the reinforcement details that confer a ductile behaviour in the connection between a steel coupling beam and a shear wall, i.e., the auxiliary stud bolts attached to the steel beam flanges and the transverse ties at the top and the bottom steel beam flanges. In addition, additional test were conducted to verify the strength equations of the connection between a steel coupling beam and a reinforced concrete shear wall. The proposed equations in this study were in good agreement with both our test results and other test data from the literature. 相似文献
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本文从转换层与其相邻上层结构的侧向刚度比、结构的嵌固部位以及0.2V0系数调整这三个方面,总结了框支剪力墙结构设计时应注意的问题。介绍了斜柱转换在工程中的应用,并对一实际工程分别采用斜柱转换和实腹梁转换的计算结果进行对比分析。结果表明:斜柱转换能明显改善转换层与其相邻上层结构的侧向刚度比,降低转换梁的截面尺寸,节省建筑的使用空间。 相似文献
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枫苑饭店改扩建工程设计与施工 总被引:3,自引:0,他引:3
对枫苑饭店改扩建工程加层和改造设计过程中各关键部分的方案确定、计算方法和构造措施等方面进行了较为系统的分析讨论。阐述了在地基基础、框架梁、柱、剪力墙的加固措施和新旧楼层连接中的处理方法。并重点针对粘钢、植筋等技术手段在工程中的应用进行了总结 相似文献
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钢梁-混凝土墙铰接节点栓钉预埋件的设计计算 总被引:2,自引:0,他引:2
针对钢梁-混凝土墙铰接连接节点中的栓钉预埋件,总结了埋置于混凝土墙中的栓钉的抗拉和抗剪承载力的计算方法,并对栓钉预埋件的受力计算进行了讨论。通过对收集到的国内外29个试验结果的验算,给出了栓钉预埋件的设计计算方法,可供工程设计参考。 相似文献
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Plate-reinforced composite (PRC) coupling beam is fabricated by embedding a vertical steel plate into a conventional-reinforced concrete coupling beam to enhance its strength and ductility. Shear studs are welded on the steel plate surfaces to allow for proper load transfer between the concrete and steel plate. The present study focuses on the evaluation of internal load distributions and load sharing on the embedded steel plate as well as at the shear studs in composite coupling beams using the nonlinear finite element package ATENA. The proposed two-dimensional finite element model is able to simulate the overall load-deflection behaviour and internal load distributions of coupling beams subjected to bending and shear forces. The reliability of the model is demonstrated by comparisons with the available experimental results. This is followed by an extensive and carefully planned parametric study using the calibrated finite element model. Numerical results on the effects of steel plate geometry, span-depth ratio of beams and steel reinforcement ratios at beam spans and in wall regions are presented and discussed in this paper. The finite element model provides a better understanding of the behaviour of shear studs as well as plate anchorage in the wall regions and embedded beam region. Based on the numerical results, equations for quantifying the shear stud forces are established and a set of non-dimensional design charts for determining the internal forces of the embedded steel plates is constructed. Both of them are useful for engineers to design PRC coupling beams. 相似文献
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正交胶合木(cross-laminated timber,CLT)-钢混合结构中,CLT剪力墙的抗侧能力主要取决于墙体与下部构件的抗剪连接.目前,角钢式抗剪连接件是工程中的主要连接形式,该类CLT墙体抗侧时,破坏往往集中在抗剪节点域,而CLT墙体受力并不大.为充分发挥CLT强度和刚度较大的优势,本文探索CLT墙与其下楼... 相似文献
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Wan-Shin Park 《Journal of Constructional Steel Research》2005,61(11):1492-1524
Steel coupling beams in a hybrid coupled shear wall provide a viable alternative for concrete coupling beams coupling individual reinforced concrete wall piers. Due to the lack of information, current design methods for calculating embedment lengths are silent about cases in which hybrid coupled walls have connection details of stud bolts and horizontal ties. In this work, an analytical study was carried out to develop a model for calculating the embedment lengths of embedded steel sections. Five models for calculating embedment lengths in a hybrid coupled wall are developed as variations of the Prestressed Concrete Institute guidelines for steel brackets attached to reinforced concrete columns. In addition, experimental studies on the hybrid coupled shear wall were carried out. The main test variables were the ratios of the coupling beam strength to the connection strength. The test results indicate that it is more advantageous to design the coupling beams as shear yielding members since the shear-critical coupling beam exhibits a more desirable mode of energy dissipation than the flexure-critical coupling beam. 相似文献