Fasad kaca struktur dilengkapi bolt mulai berkembang ke tahap penggunaan teknik yang lebih matang dan menjadi sistem fasad lutsinar yang paling tersedia khususnya untuk rumah kedai, laluan pejalan kaki dan kawasan lobi dalam bangunan.
Sistem fasad kaca titik tetap, juga dikenali sebagai sistem kaca labah-labah adalah sangat terkenal dan dianggap pilihan fasad yang lebih elegan berbanding sistem fasad kaca berbingkai. Sistem ini ditetapkan pada struktur sokongan menggunakan pemasangan bolt istimewa dan struktur lengan labah-labah yang memerlukan panel kaca didrill dan tempered. Akibatnya, kaca menjadi rapuh terutamanya di kawasan berlakunya tekanan puncak apabila daya dikenakan. Oleh itu, taburan tekanan terhadap sistem kaca berbolt titik tetap yang dikenakan beban statik dikaji berasaskan model berangka dan analisis parametrik. Model berangka dibina mengikut spesifikasi yang dinyatakan dalam projek penyelidikan yang lepas, dilaksanakan menggunakan perisian Abaqus dan dikenakan beban mampatan semasa ujian lenturan tiga titik. Model disahkan dengan membandingkan keputusan eksperimen yang lepas dengan keputusan berangka. Taburan tekanan terhadap panel kaca dianalisis melalui analisis unsur terhingga bukan linear. Pengaruh bilangan sambungan bolt, jarak lubang dari tepi panel, ruang di antara dua lubang bolt berturut-turut, diameter lubang sambungan bolt, susunan sambungan bolt dan ketebalan panel kaca terhadap taburan tekanan boleh ditentukan melalui kajian parametrik. Peningkatan bilangan sambungan bolt, jarak lubang dari tepi panel, diameter lubang sambungan bolt dan ketebalan panel kaca serta susunan sambungan bolt berbentuk berlian akan membawa kesan positif terhadap tegasan principal maksimum.
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Bolted structural glass facades have evolved to the point where the technique appears to have matured and become the most transparent facade system available mainly for storefront, walkways and lobby areas in buildings. The point fixed glass façade system (PFGFS), also known as a spider glass system, is popular and considered to be a more elegant façade option compared to the framed glass façade system. The system is fixed to the support structure using special bolt fittings and structural spider arms, which implies that the glass must be drilled and tempered. Consequently, the glass is significantly weakened exactly at the position where peak stresses occur when forces are applied. In this research, the stress distribution on point-fixed bolted glass system subjected to static loading are investigated by means of numerical modelling and parametric analyses. A numerical model was constructed according to the specifications specified in past research project, implemented using ABAQUS software and subjected to a compressive load during three points bending test. The model was validated by comparing the past experimental results with the numerical results. By means of nonlinear
finite element analyses, the stress distribution of the glass panel has been investigated. The influence of the number of connectors, hole-to-edge distance, spacing of the bolt connections, hole diameter, arrangement of connectors and thickness of glass pane on stress distribution were determined through the parametric study. Increasing the number of bolts, the hole-to-edge distance, the bolt hole diameter and the glass thickness as well as the diamond pattern of bolts arrangement, have shown the positive effect on the maximum principal stress.
An investigation on stress concentration of point-fixed bolted glass system subjected to static loading / Farhana Faisal