Application of Codes Performance‐Based Design Procedures for a Tall Building Using Recorded and Spectrally Modified Ground Motions

There is a growing tendency toward the performance‐based design of tall buildings, where any assessment using response history analysis requires a set of ground motion (GM) records. This paper considering a tall building as a case study investigates how judgment on the seismic safety of the structure is affected by the use of recorded or spectrally matched GMs. Three model structures are developed: (a) using conventional design procedure of Chapter 12 of ASCE 7‐16; (b) adopting linear analysis requirements of Chapter 16 of ASCE 7‐16; (c) designing for service‐level design earthquake of Los Angles Tall Building Structural Design Council (LATBSDC) procedure. It is shown that all of the structures give acceptable performance when subjected to simulated GMs, although this is not the case for amplitude‐scaled GMs based on ASCE 7‐16 and LATBSDC. Finally, to have an objective assessment of performance, independent of GM types, incremental dynamic analysis is employed to derive fragility and mean annual rate of exceeding (MAR). Results show that for anticipated drifts at Maximum Considered Earthquake (MCE) level, the structures provide acceptable MAR at the fundamental period. However, for the higher modes including the second and third periods, MAR values become acceptable only at drifts as large as 0.085.     

基于BIM的集成建筑设施管理系统架构与实现

本文针对建筑项目后期运维管理应用,提出了一种以BIM数据为基础,综合建筑设备管理、物业管理、建筑智能化管理于一体的集成建筑设施管理系统,将企业管理信息系统与智能化管理系统进一步集成;结合相关应用,对基于BIM的集成建筑设施管理系统架构、BIM集成、集成建筑设施管理系统数据库设计等关键问题进行了介绍。结果表明,基于BIM的集成建筑设施管理系统实现了传统建筑设施管理、物业管理、建筑智能化管理的集成与统一应用;系统应用BIM技术描述建筑对象,具有标准化、可视化等特点,是建筑设施管理系统的进一步优化与升级。     

BLM在房屋设施信息化管理中的应用

基于BLM理念实现房屋内部设施的信息化是城市建筑精细化管理的重要部分,是数字城市发展的必然趋势。本文首先分析房屋设施管理的数据资源,结合BLM相关理论和技术,设计房屋设施数据管理体系,在此基础上进行数据库建设和应用系统开发。将BLM理念和BIM技术应用于房屋设施数据的组织和管理,是建筑领域先进理念和技术在房屋建筑二维层面上的实现。     

Performance‐based design of high‐rise coupled wall systems

Coupled core walls provide an efficient lateral load‐resisting system. Performance of coupled wall systems depends primarily on ensuring that coupling beams provide adequate stiffness and strength. Current design guidelines, which are based on a strength‐based design approach, often result in beams with unrealistic details. Previous studies have also demonstrated that coupled core walls behave differently from what is assumed in a traditional strength‐based design approach. Therefore, currently available strength‐based design methodology is inadequate to address a large class of coupled core wall systems, and alternative design approaches are necessary. In this paper, a rational approach based on a performance‐based design method is demonstrated through the design and analysis of a prototype 30‐story coupled core wall structure. Critical responses of the prototype structure at different limit states under representative ground motions are compared in order to evaluate the adequacy of the performance‐based design method. Copyright © 2006 John Wiley & Sons, Ltd.     

AKR‐Prüfverfahren: Auf dem Weg zur Performance‐Prüfung

ASR Test Methods: On the Way to Performance Testing To avoid a deleterious alkali silica reaction in concrete structures (ASR) the alkali‐reactivity potential of aggregates must be known. Then appropriate preventive measures can be applied when reactive aggregates are used. In the past the alkali reactivity of dense aggregates was tested with the concrete prism test with the 40 °C fog chamber method. Comparative investigations with storage in an outdoor exposure site confirm, that reactive aggregates, that have to be tested according to Part 3 of the Alkali Guidelines of the German Committee for Reinforced Concrete (DAfStb), can be identified in the laboratory test. For a quick assessment the 60 °C concrete prism test can be used as an alternative. Its suitability was confirmed by a comparison to the 40 °C fog chamber method. The assessment of the suitability of specific concrete compositions in performance tests is necessary to avoid excluding aggregates or cements unnecessarily from application as well as to simulate an external supply of alkalis if necessary. These tests give information about the possible appearance of a deleterious ASR with a specific concrete composition depending on the exposure or humidity class of the concrete. To develop such a performance test, the Research Institute of the Cement Industry examined, amongst others, cores from affected and unaffected concrete pavements in concrete prism tests with the 40 °C fog chamber method and 60 °C concrete prism test with and without an external supply of alkalis.     

Sense‐Think‐Act Framework for Intelligent Building Energy Management

The realization of smart and energetically efficient buildings is contingent upon the successful implementation of two tasks that occur on distinct phases of the building life cycle: in the design and subsequent retrofitting phases, the selection and implementation of an effective energy concept, and, during the operation phase, the actuation of energy systems to ensure parsimonious energy use while retaining acceptable end‐user thermal comfort. Operational efficiencies are achieved through the use of Building Energy Management Systems tasked to deliver core Sense, Think, Act (STA) functionalities: Sense, using sensing modalities installed in the building; Think, utilizing, typically a rule‐based decision system; and Act, by sending actuation commands to controllable building elements. Providing the intelligence in this STA process can be a formidable task due to the complex interplay of many systems and occurrence of disturbances. In this article, an architectural and algorithmic framework is presented to provide streamlined implementation of this process. Important ingredients in this framework are: (S) a data access component capable of collecting and aggregating information from a number of heterogeneous sources (sensors, weather stations, weather forecasts); (T) a model‐based optimization methodology to generate intelligent operational decisions; and (A) an assessment and actuation component. An illustrative application of the proposed methodology in an office building is provided.     

Performance‐based plastic design method for tall hybrid coupled walls

The research presented herein involves a performance‐based design method for a tall hybrid coupled wall (HCW) system. For this study, HCW structures were designed with a performance‐based plastic design (PBPD) method. This approach directly accounts for inelastic structural behavior and considers design lateral force distribution at ultimate limit state. The design concept uses a pre‐selected target drift and yield mechanism as key performance limit states. The yield mechanism consists of shear yielding in the coupling beams and flexural yielding of reinforced concrete walls at the bases. HCW structures with varying heights and coupling ratios (CRs) were designed and subjected to a series of nonlinear dynamic analyses. The results indicated that the CR strongly influences the response of the structure. The structures could also be under‐designed when the inelastic distribution of lateral forces owing to higher modes was not properly considered. Finally, a design method to account for higher mode effects within the PBPD framework was presented. The method was validated using the results from nonlinear analyses. Copyright © 2016 John Wiley & Sons, Ltd.     

Performance‐based seismic design of an irregular tall building in Istanbul

Structural design of a 50‐story tall reinforced concrete residential building, which was planned to be constructed in Istanbul and given up afterwards by the investor, has been completed in accordance with the draft version of Seismic Design Code for Tall Buildings in Istanbul that adopts performance‐based seismic design as the basic approach as Tall Buildings Initiative Guidelines do. Seismic design of the building has formed the main part of the structural design process due to high seismicity of the proposed location and extremely irregular floor plan not conforming to usual tall building structures. The building consists of two individual buildings linked through sky floors at the top 12 stories whose design was one of the most challenging works. The building has been designed for design basis earthquake by elastic response spectrum analysis, and its seismic performance has been checked for maximum considered earthquake by nonlinear time‐history analyses carried out using PERFORM‐3D. Copyright © 2015 John Wiley & Sons, Ltd.     

基于BIM的建筑设备可视化运维管理系统研究

建筑设施设备的运维管理是建筑全生命周期中的重要阶段,传统的运维管理方式较为单一,存在数字化水平低,可视化程度低等问题,导致设备维护不精准、运维工作效率低,很难满足运维人员的管理需要。本文介绍了基于BIM的建筑设备可视化运维管理系统,详细阐述了系统构建的关键技术,并从设备信息管理、设备运行管理、空间管理、维修管理、能耗管理等方面介绍了该系统的运作流程和功能特点。该系统依托BIM三维可视化模型,以Web端和移动端作为载体,融合了BIM技术、互联网技术和物联网技术,可作为实际运维工作系统开发的理论参考。文末以某机场专机楼实际应用情况为例,分析了该系统的突出应用价值,同时也发现想要深入挖掘运维平台的应用价值,需要多方提前规划投入和高度配合,即便技术条件允许,在成本受控的情况下,运维平台也难以将其价值完整发挥。     

国内外消防培训基地训练设施的建设

消防培训基地训练设施是指消防培训基地内用于进行消防灭火救援训练和教学的场区、建筑、装置和设备。利用训练设施，可以为消防员提供必要的体能、基本技能、灭火、抢险救援技战术、火灾预防等训练，对于提高消防员身体、心理素质，增强在特殊环境下心理、生理适应能力和灭火救援技战术水平具有重要意义。     

Performance–cost optimization of tuned mass damper under low‐moderate seismic actions

In this paper, a multi‐objective optimization of a single tuned mass damper is proposed at the aim to control vibrations induced in building structures under low‐moderate earthquakes. The optimum design is carried out by considering both economic and performance criteria. The cost of the device is the economic objective that is assumed directly related to its mechanical parameters. At the aim to control the damage level and the behaviour of components and equipment, the ratio between the absolute accelerations of the protected structure and the unprotected one is assumed as the device performance. A multi‐objective optimization is then formulated, and Pareto optimum solutions are achieved by the Non‐dominated Sorting Genetic Algorithm in its second version. Finally, a sensitivity analysis of the optimum solution with respect to some input data is carried out. Copyright © 2016 John Wiley & Sons, Ltd.     

Toward a Trust‐Based Construction Management

Abstract: The growing complexity of AEC projects is increasing the importance of the building construction coordination role. Moreover, the uncertainty linked to the environment of the construction activity makes way for the notion of trust. The coordinator can make use of multiple tools/views for accomplishing his mission. This research work suggests analyzing data coming from these different views to consolidate trust indicators informing the coordinator about “trust in the correct progression of the construction activity.” The approach suggested in this article distinguishes between four aspects of the activity determining the global trust level: task progress, actor's performance, documents required to perform the task, and building elements resulting from the task. The proposal suggests introducing these trust indicators in a dashboard, included in a multiview interface, thus allowing the coordinator to identify the tasks with a low trust level and to understand the nature of dysfunctions. A prototype has been developed and integrated in a service‐based IT infrastructure. Results of an experiment stage are finally discussed to validate the approach.