Engineering Mechanics in High-Rise Building with Irregular Planner

2014 ◽  
Vol 540 ◽  
pp. 193-196
Author(s):  
Lu Jiang Yang ◽  
De Wen Liu ◽  
Zhong Li Guo ◽  
Jing Li ◽  
Bi Hui Dai
Keyword(s):  
Architectural Design ◽  
Seismic Load ◽  
Building Structure ◽  
Maximum Displacement ◽  
High Rise ◽  
Unit Structure ◽  
General Plan ◽  
Structural Calculation ◽  
Displacement Angle ◽  
Force Displacement

Plane functional layout and total controlling plan of the general plan in the building always are abnormal. Furthermore the floor size and horizontal stiffness in the same floor are different tremendously, otherwise there are many dislocation floor in the same floor, according to different function in the same floor. Irregular plane in the building may happen according to the situation above. It is harmful to the force,, displacement and deformation in irregular plane. In order to research the essence of the irregular plane and avoid it, firstly the irregular plane is introduced, also we have distinguished stretch joint, settlement joint and, seismic joint according to the force theory of structure, and then we have used PKPM structural calculation program to build model, simulating the force in two improved models on the dead load, live load and horizontal seismic load, we have gotten the maximum displacement, maximum displacement angle, velocity, acceleration, shear force and moment, then we have analysised and compared displacement, movement and force. Finally, we have concluded:“Architectural design should be adopted by regular plane designing rule，it should not be adopted by irregular plane designing rule；for the building structure which body is complex and irregular plane，the designer should install the seismic joint in the appropriate parts according to actual needs，make the irregular building structure into several regular unit structure which could resist the horizontal load.”

Engineering Mechanics in Whipping Effect of High-Rise Building

2014 ◽  
Vol 540 ◽  
pp. 173-176 ◽  
Author(s):  
Lu Jiang Yang ◽  
De Wen Liu ◽  
Zhong Li Guo ◽  
Jing Li ◽  
Bi Hui Dai
Keyword(s):  
Horizontal Displacement ◽  
Seismic Load ◽  
Maximum Displacement ◽  
Vertical Stiffness ◽  
High Rise ◽  
High Rise Building ◽  
Building Models ◽  
Cantilever Structure ◽  
Displacement Angle ◽  
Engineering Mechanics

When the vertical stiffness is fixed up uneven, and there is some prominence in top, or he vertical stiffness changes suddenly, the amplitudethe and horizontal displacement of the top in high-rise building will increases fiercely, this phenomenon is whipping lash effect. It is harmful to the whipping lash effect in the top of the high-rise building when it is forced, moved and deformed, the phenomenon of whipping lash effect is evident in high-rise building. In order to research the essence of the whipping lash effect and avoid it, firstly the whipping lash effect is introduced, also we have distinguished the whipping lash effect and cantilever structure by analysising the non-statically structure and statically structure. Then we have made three different high-rise building models which are put on the dead load, live load and horizontal seismic load, also we have gotten the maximum displacement, maximum displacement angle, velocity, acceleration, shear force and moment, then we have analysised and compared displacement, movement and force. Finally, we have concluded:“The vertical stiffness should be fixed up consistency and changed uniformly in order to reduce the influence of the whipping lash effect in the high-rise building.

scholarly journals A Quantitative Method for Evaluation of Visual Privacy in Residential Environments

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 272
Author(s):  
He Zheng ◽  
Bo Wu ◽  
Heyi Wei ◽  
Jinbiao Yan ◽  
Jianfeng Zhu
Keyword(s):  
Urban Areas ◽  
Architectural Design ◽  
Ground Level ◽  
High Density ◽  
Rapid Expansion ◽  
High Rise ◽  
Visual Exposure ◽  
Building Management ◽  
Visual Privacy ◽  
Building Level

With the rapid expansion of high-rise and high-density buildings in urban areas, visual privacy has become one of the major concerns affecting human environmental quality. Evaluation of residents’ visual exposure to outsiders has attracted more attention in the past decades. This paper presents a quantitative indicator; namely, the Potential Visual Exposure Index (PVEI), to assess visual privacy by introducing the damage of potential visual incursion from public spaces and neighborhoods in high-density residences. The method for computing the PVEI mainly consists of three steps: extracting targets and potential observers in a built environment, conducting intervisibility analysis and identifying visible sightlines, and integrating sightlines from building level and ground level to compute the PVEI value of each building opening. To validate the proposed PVEI, a case study with a sample building located at the center of Kowloon, Hong Kong, was evaluated. The results were in accordance with the common-sense notion that lower floors are subjected to poor visual privacy, and privacy is relatively well-preserved in upper floors in a building. However, residents of middle floors may suffer the worst circumstances with respect to visual privacy. The PVEI can be a useful indicator to assess visual privacy and can provide valuable information in architectural design, hotel room selection, and building management.

Material Characterization and Mid-Span Bending Capacity With Finite Element Simulated Predictions

2011 ◽  
Author(s):  
Walter Anderson ◽  
Ahmadreza Eshghinejad ◽  
Mohammad Elahinia
Keyword(s):  
Finite Element ◽  
Load Capacity ◽  
Tensile Tests ◽  
Unified Model ◽  
Radius Of Curvature ◽  
Maximum Displacement ◽  
Test Fixture ◽  
Different Temperatures ◽  
Bending Capacity ◽  
Force Displacement

Intelligent materials have been the subject of research for many years. Shape memory alloys (SMAs) are a type of intelligent material that has been targeted for many different uses; such as actuators, sensors and structural supports. SMAs are attractive as actuators due to their large energy density. Although a great deal of information is available on the axial load capacity and on the tip force for SMA tweezer-like devices, there is not enough information about the load capacity at mid-span, especially at the macro-level. Imposed displacement at mid-span experimental evaluation of an SMA beam in the austenitic and martensitic regimes has been studied. To this end, a specimen of near equi-atomic nitinol was heat-treated (shape set) into a ‘U’ shape and loaded into a custom test fixture such that the boundary conditions of the beam are approximated as roller-roller; and the sample was deformed at different temperatures while reaction forces were measured. The displacement is near maximum displacement of the U shape without causing a change in concavity, thus full-scale capacity is shown. Additionally, Unified Model (finite element) predictions of the experimental response are also presented, with good agreement. Due to the robust nature of the Unified Model, geometric parameter variations (wire diameter and radius of curvature) were then simulated to encompass the design envelop for such an actuator. The material properties needed as inputs to the Unified Model were obtained from constant temperature tensile tests of a specimen subjected to the same heat treatment (shape set straight). The resultant critical stresses were then extracted using the tangent method similar to the one described in ASTM F-2082. It is worth noting that the specimen was trained before the stress value extraction, but the transversely loaded specimen was not trained due to the difficulty involved (inherent uneven stress distribution). The contribution of this work is the presentation of experimental results for transverse (mid-span) loading of a nitinol wire and the simulation results allowing for design of a proper actuator with known constraints on force, displacement or temperature (2 of 3 needed). In other words, this work could be used as a type of 3D look-up table; e.g. for a desired force/displacement, the required temperatures are given. Future work includes developing a sensor-less control strategy for simultaneous force/displacement control.

scholarly journals An Overview of High-Rise Buildings in Jakarta since 1967 to 2020

2021 ◽  
Vol 933 (1) ◽  
pp. 012001
Author(s):  
M F Effendi ◽  
I F Ridzqo ◽  
S W Dharmatanna
Keyword(s):  
Architectural Design ◽  
Tall Buildings ◽  
Building Design ◽  
Building Construction ◽  
Urban Habitat ◽  
Design Development ◽  
High Rise ◽  
High Rise Building ◽  
Environmentally Safe ◽  
Construction Knowledge

Abstract High-rise buildings in big cities are crucial for business, economic, educational, residential, and entertainment activities in recent times. The technology discoveries in various fields that support high-rise building construction such as structure, mechanical, electrical, and materials have opened up opportunities for comfortable and environmentally safe architectural work. The first milestone of high-rise building construction knowledge in Indonesia was the completion of the thirteen-floors Sarinah retail building in 1967. Indonesia, especially in Jakarta, then experienced rapid growth of high-rise buildings construction. However, there is limited research on the development of high-rise building designs in Indonesia, especially from an architectural design perspective. It leads to the lack of literature on high-rise building design in Indonesia. By utilizing a publicly accessible database from the Council of Tall Buildings and Urban Habitat and recent literature called Designing Tall Building by Mark Sarkisian, this paper explores the design development of high-rise buildings in Jakarta from time to time in the aspects of architecture, structure and sustainability.

scholarly journals Seismic performance evaluation of high-rise steel buildings dependent on wind exposures

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401983511
Author(s):  
Seonwoong Kim
Keyword(s):  
Seismic Performance ◽  
Response Spectrum ◽  
Slenderness Ratio ◽  
Lateral Force ◽  
Lateral Load ◽  
Seismic Load ◽  
Strong Wind ◽  
Steel Buildings ◽  
High Rise ◽  
Moderate Seismicity

The lateral load-resisting system of high-rise buildings in regions of low and moderate seismicity and strong wind such as the typhoon in the Korean peninsula considers the wind load as the governed lateral force so that the practical structural engineer tends to skip the evaluation against the seismic load. This study is to investigate wind-designed steel diagrid buildings located in these regions and check the possibility of the elastic design of them out. To this end, first, the diagrid high-rise buildings were designed to satisfy the wind serviceability criteria specified in KBC 2016. Then, the response spectrum analyses were performed under various slenderness ratio and wind exposures. The analyses demonstrated the good seismic performance of these wind-designed diagrid high-rise buildings because of the significant over-strength induced by the lateral load-resisting system of high-rise buildings. Also, the analysis results showed that the elastic seismic design process of some diagrid high-rise buildings may be accepted based on slenderness ratios in all wind exposures.

STRUCTURAL AND GEOTECHNICAL DESIGN OF A HIGH-RISE BUILDING USING A 3D BIM GENERATED MODEL

2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Ahmed Romaih ◽  
Sama Taha ◽  
Mina Naguib ◽  
Salma Ibrahim ◽  
Youssef Halabi ◽  
...  
Keyword(s):  
Architectural Design ◽  
High Water ◽  
Building Site ◽  
American University ◽  
High Rise ◽  
High Rise Building ◽  
Building Information ◽  
Geotechnical Design ◽  
Graduation Project ◽  
Full Design

This paper presents the work performed by an undergraduate student group at the American University in Cairo as a first phase of their graduation project that mimics a state-of-the-art industrial experience in structural and geotechnical design of a high-rise building using building information model (BIM). A 3-D BIM was developed for the structure and used to generate an analytical model which is exported to a structural numerical analysis program, followed by a full design of the building elements and foundation. The considered building is 218 m high, in which the architectural design requires a successive 2-degrees twist per floor through the building height, resulting in a total twist of 80 degrees between the first and last floors. The architect also retracted the slabs every six stories from a group of columns, leaving 24 m-height laterally unsupported peripheral columns. As such, the vertical and horizontal building irregularities present challenges in the structural modeling and design and requires thorough analyses, particularly for seismic and wind considerations. Due to the high water table at the building site and the existence of a 12.5 underground basement, a special dewatering technique was proposed, along with the full tanking design consideration of the building basement.

The Analysis of Cantilever on Catastrophe to Irregular High-Rise Structure in Earthquake

2012 ◽  
Vol 166-169 ◽  
pp. 2364-2367
Author(s):  
Jia Hui Zhang ◽  
Zhong Ming Xiong ◽  
Zhi Qiang Chen ◽  
Ling Bo Kong
Keyword(s):  
Engineering Design ◽  
Seismic Response ◽  
Seismic Design ◽  
Building Structure ◽  
Reverse Effect ◽  
High Rise ◽  
Earthquake Action ◽  
Architectural Development

Anomalistic architecture especially overhanging structure has become a trend of architectural development, Based on the characteristics of a large vertical eccentric, more prominent facade and strong reverse effect,overhanging structure is often serious super-norm and extremely detrimental to the seismic design[1], Now it has become an important part of seismic review. By the analysis and comparison on the coupling of the translational and torsional seismic response from ANSYS program[2]. The behavior of seismic catastrophe of cantilever building structure is studied under bi-directional earthquake action and the change law of cantilever member with the length is obtained, the suggestions on engineering design are put forward for future seismic design of such structures.

Seismic Evaluation of Buildings with Plan Irregularity

2016 ◽  
Vol 857 ◽  
pp. 225-230 ◽  
Author(s):  
Ann Thomas Jereen ◽  
Soumya Anand ◽  
Binu M. Issac
Keyword(s):  
Lateral Stiffness ◽  
Lateral Loads ◽  
Base Shear ◽  
Seismic Evaluation ◽  
Maximum Displacement ◽  
Engineering Construction ◽  
High Rise ◽  
Story Drift ◽  
Modern Technologies ◽  
Plan Configuration

With the application of modern technologies in Civil Engineering, construction of high rise buildings with irregular plan configuration is increasing very quickly. Multi-story buildings are prone to lateral loads from wind or earthquake, which necessitates the need of seismic studies. Buildings can be designed to reduce these lateral loads by many methods; which is why the action of structural diaphragms have to be studied. Several studies have shown the effect of plan configuration on base shear, displacement and story drift, torsional buckling. The lateral stiffness of the building frame affects the maximum displacement of the structure due to earthquake. Study is done on various plan configuration buildings and the action of structural diaphragm on its performance during earthquake is studied.

scholarly journals Structural Glass Systems under Fire: Overview of Design Issues, Experimental Research, and Developments

2017 ◽  
Vol 2017 ◽  
pp. 1-18 ◽  
Author(s):  
Chiara Bedon
Keyword(s):  
Architectural Design ◽  
Constructional Material ◽  
Careful Consideration ◽  
Structural Glass ◽  
Design Concepts ◽  
High Rise ◽  
Standard Glass ◽  
Load Carrying ◽  
Actual Design ◽  
Thermal Phenomena

Architectural design concepts incorporating glass beams, panels, or generally load-carrying elements and stiffeners for buildings, claddings, windows, and partitions are largely considered in modern high-rise constructions. A multitude of aspects, including motivations related to transparency, aesthetics, illumination, and energy conservation, progressively increased the use and interest for such a still rather innovative constructional material. However, compared to other traditional materials for buildings, standard glass is typically characterized by brittle behaviour and limited tensile resistance. The intrinsic properties of glass, moreover, together with typically limited thickness-to-size ratios for glazing elements, or the mutual interaction of glass components with adjacent constructional elements as a part of full assemblies they belong (i.e., fixing systems, sealants, etc.), as well as the combination of mechanical and thermal phenomena, make glass structures highly vulnerable. Special safety design rules are hence required, especially under extreme loading conditions. In this review paper, a state of the art on structural glass systems exposed to fire is presented. Careful consideration is paid for actual design methods and general regulations, as well as for existing research outcomes—both at the material and assembly levels—giving evidence of current challenges, issues, and developments.

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